| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * builtin-record.c |
| * |
| * Builtin record command: Record the profile of a workload |
| * (or a CPU, or a PID) into the perf.data output file - for |
| * later analysis via perf report. |
| */ |
| #include "builtin.h" |
| |
| #include "util/build-id.h" |
| #include <subcmd/parse-options.h> |
| #include <internal/xyarray.h> |
| #include "util/parse-events.h" |
| #include "util/config.h" |
| |
| #include "util/callchain.h" |
| #include "util/cgroup.h" |
| #include "util/header.h" |
| #include "util/event.h" |
| #include "util/evlist.h" |
| #include "util/evsel.h" |
| #include "util/debug.h" |
| #include "util/mmap.h" |
| #include "util/mutex.h" |
| #include "util/target.h" |
| #include "util/session.h" |
| #include "util/tool.h" |
| #include "util/symbol.h" |
| #include "util/record.h" |
| #include "util/cpumap.h" |
| #include "util/thread_map.h" |
| #include "util/data.h" |
| #include "util/perf_regs.h" |
| #include "util/auxtrace.h" |
| #include "util/tsc.h" |
| #include "util/parse-branch-options.h" |
| #include "util/parse-regs-options.h" |
| #include "util/perf_api_probe.h" |
| #include "util/llvm-utils.h" |
| #include "util/bpf-loader.h" |
| #include "util/trigger.h" |
| #include "util/perf-hooks.h" |
| #include "util/cpu-set-sched.h" |
| #include "util/synthetic-events.h" |
| #include "util/time-utils.h" |
| #include "util/units.h" |
| #include "util/bpf-event.h" |
| #include "util/util.h" |
| #include "util/pfm.h" |
| #include "util/clockid.h" |
| #include "util/pmu-hybrid.h" |
| #include "util/evlist-hybrid.h" |
| #include "util/off_cpu.h" |
| #include "asm/bug.h" |
| #include "perf.h" |
| #include "cputopo.h" |
| |
| #include <errno.h> |
| #include <inttypes.h> |
| #include <locale.h> |
| #include <poll.h> |
| #include <pthread.h> |
| #include <unistd.h> |
| #ifndef HAVE_GETTID |
| #include <syscall.h> |
| #endif |
| #include <sched.h> |
| #include <signal.h> |
| #ifdef HAVE_EVENTFD_SUPPORT |
| #include <sys/eventfd.h> |
| #endif |
| #include <sys/mman.h> |
| #include <sys/wait.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <linux/err.h> |
| #include <linux/string.h> |
| #include <linux/time64.h> |
| #include <linux/zalloc.h> |
| #include <linux/bitmap.h> |
| #include <sys/time.h> |
| |
| struct switch_output { |
| bool enabled; |
| bool signal; |
| unsigned long size; |
| unsigned long time; |
| const char *str; |
| bool set; |
| char **filenames; |
| int num_files; |
| int cur_file; |
| }; |
| |
| struct thread_mask { |
| struct mmap_cpu_mask maps; |
| struct mmap_cpu_mask affinity; |
| }; |
| |
| struct record_thread { |
| pid_t tid; |
| struct thread_mask *mask; |
| struct { |
| int msg[2]; |
| int ack[2]; |
| } pipes; |
| struct fdarray pollfd; |
| int ctlfd_pos; |
| int nr_mmaps; |
| struct mmap **maps; |
| struct mmap **overwrite_maps; |
| struct record *rec; |
| unsigned long long samples; |
| unsigned long waking; |
| u64 bytes_written; |
| u64 bytes_transferred; |
| u64 bytes_compressed; |
| }; |
| |
| static __thread struct record_thread *thread; |
| |
| enum thread_msg { |
| THREAD_MSG__UNDEFINED = 0, |
| THREAD_MSG__READY, |
| THREAD_MSG__MAX, |
| }; |
| |
| static const char *thread_msg_tags[THREAD_MSG__MAX] = { |
| "UNDEFINED", "READY" |
| }; |
| |
| enum thread_spec { |
| THREAD_SPEC__UNDEFINED = 0, |
| THREAD_SPEC__CPU, |
| THREAD_SPEC__CORE, |
| THREAD_SPEC__PACKAGE, |
| THREAD_SPEC__NUMA, |
| THREAD_SPEC__USER, |
| THREAD_SPEC__MAX, |
| }; |
| |
| static const char *thread_spec_tags[THREAD_SPEC__MAX] = { |
| "undefined", "cpu", "core", "package", "numa", "user" |
| }; |
| |
| struct pollfd_index_map { |
| int evlist_pollfd_index; |
| int thread_pollfd_index; |
| }; |
| |
| struct record { |
| struct perf_tool tool; |
| struct record_opts opts; |
| u64 bytes_written; |
| u64 thread_bytes_written; |
| struct perf_data data; |
| struct auxtrace_record *itr; |
| struct evlist *evlist; |
| struct perf_session *session; |
| struct evlist *sb_evlist; |
| pthread_t thread_id; |
| int realtime_prio; |
| bool switch_output_event_set; |
| bool no_buildid; |
| bool no_buildid_set; |
| bool no_buildid_cache; |
| bool no_buildid_cache_set; |
| bool buildid_all; |
| bool buildid_mmap; |
| bool timestamp_filename; |
| bool timestamp_boundary; |
| bool off_cpu; |
| struct switch_output switch_output; |
| unsigned long long samples; |
| unsigned long output_max_size; /* = 0: unlimited */ |
| struct perf_debuginfod debuginfod; |
| int nr_threads; |
| struct thread_mask *thread_masks; |
| struct record_thread *thread_data; |
| struct pollfd_index_map *index_map; |
| size_t index_map_sz; |
| size_t index_map_cnt; |
| }; |
| |
| static volatile int done; |
| |
| static volatile int auxtrace_record__snapshot_started; |
| static DEFINE_TRIGGER(auxtrace_snapshot_trigger); |
| static DEFINE_TRIGGER(switch_output_trigger); |
| |
| static const char *affinity_tags[PERF_AFFINITY_MAX] = { |
| "SYS", "NODE", "CPU" |
| }; |
| |
| #ifndef HAVE_GETTID |
| static inline pid_t gettid(void) |
| { |
| return (pid_t)syscall(__NR_gettid); |
| } |
| #endif |
| |
| static int record__threads_enabled(struct record *rec) |
| { |
| return rec->opts.threads_spec; |
| } |
| |
| static bool switch_output_signal(struct record *rec) |
| { |
| return rec->switch_output.signal && |
| trigger_is_ready(&switch_output_trigger); |
| } |
| |
| static bool switch_output_size(struct record *rec) |
| { |
| return rec->switch_output.size && |
| trigger_is_ready(&switch_output_trigger) && |
| (rec->bytes_written >= rec->switch_output.size); |
| } |
| |
| static bool switch_output_time(struct record *rec) |
| { |
| return rec->switch_output.time && |
| trigger_is_ready(&switch_output_trigger); |
| } |
| |
| static u64 record__bytes_written(struct record *rec) |
| { |
| return rec->bytes_written + rec->thread_bytes_written; |
| } |
| |
| static bool record__output_max_size_exceeded(struct record *rec) |
| { |
| return rec->output_max_size && |
| (record__bytes_written(rec) >= rec->output_max_size); |
| } |
| |
| static int record__write(struct record *rec, struct mmap *map __maybe_unused, |
| void *bf, size_t size) |
| { |
| struct perf_data_file *file = &rec->session->data->file; |
| |
| if (map && map->file) |
| file = map->file; |
| |
| if (perf_data_file__write(file, bf, size) < 0) { |
| pr_err("failed to write perf data, error: %m\n"); |
| return -1; |
| } |
| |
| if (map && map->file) { |
| thread->bytes_written += size; |
| rec->thread_bytes_written += size; |
| } else { |
| rec->bytes_written += size; |
| } |
| |
| if (record__output_max_size_exceeded(rec) && !done) { |
| fprintf(stderr, "[ perf record: perf size limit reached (%" PRIu64 " KB)," |
| " stopping session ]\n", |
| record__bytes_written(rec) >> 10); |
| done = 1; |
| } |
| |
| if (switch_output_size(rec)) |
| trigger_hit(&switch_output_trigger); |
| |
| return 0; |
| } |
| |
| static int record__aio_enabled(struct record *rec); |
| static int record__comp_enabled(struct record *rec); |
| static size_t zstd_compress(struct perf_session *session, struct mmap *map, |
| void *dst, size_t dst_size, void *src, size_t src_size); |
| |
| #ifdef HAVE_AIO_SUPPORT |
| static int record__aio_write(struct aiocb *cblock, int trace_fd, |
| void *buf, size_t size, off_t off) |
| { |
| int rc; |
| |
| cblock->aio_fildes = trace_fd; |
| cblock->aio_buf = buf; |
| cblock->aio_nbytes = size; |
| cblock->aio_offset = off; |
| cblock->aio_sigevent.sigev_notify = SIGEV_NONE; |
| |
| do { |
| rc = aio_write(cblock); |
| if (rc == 0) { |
| break; |
| } else if (errno != EAGAIN) { |
| cblock->aio_fildes = -1; |
| pr_err("failed to queue perf data, error: %m\n"); |
| break; |
| } |
| } while (1); |
| |
| return rc; |
| } |
| |
| static int record__aio_complete(struct mmap *md, struct aiocb *cblock) |
| { |
| void *rem_buf; |
| off_t rem_off; |
| size_t rem_size; |
| int rc, aio_errno; |
| ssize_t aio_ret, written; |
| |
| aio_errno = aio_error(cblock); |
| if (aio_errno == EINPROGRESS) |
| return 0; |
| |
| written = aio_ret = aio_return(cblock); |
| if (aio_ret < 0) { |
| if (aio_errno != EINTR) |
| pr_err("failed to write perf data, error: %m\n"); |
| written = 0; |
| } |
| |
| rem_size = cblock->aio_nbytes - written; |
| |
| if (rem_size == 0) { |
| cblock->aio_fildes = -1; |
| /* |
| * md->refcount is incremented in record__aio_pushfn() for |
| * every aio write request started in record__aio_push() so |
| * decrement it because the request is now complete. |
| */ |
| perf_mmap__put(&md->core); |
| rc = 1; |
| } else { |
| /* |
| * aio write request may require restart with the |
| * reminder if the kernel didn't write whole |
| * chunk at once. |
| */ |
| rem_off = cblock->aio_offset + written; |
| rem_buf = (void *)(cblock->aio_buf + written); |
| record__aio_write(cblock, cblock->aio_fildes, |
| rem_buf, rem_size, rem_off); |
| rc = 0; |
| } |
| |
| return rc; |
| } |
| |
| static int record__aio_sync(struct mmap *md, bool sync_all) |
| { |
| struct aiocb **aiocb = md->aio.aiocb; |
| struct aiocb *cblocks = md->aio.cblocks; |
| struct timespec timeout = { 0, 1000 * 1000 * 1 }; /* 1ms */ |
| int i, do_suspend; |
| |
| do { |
| do_suspend = 0; |
| for (i = 0; i < md->aio.nr_cblocks; ++i) { |
| if (cblocks[i].aio_fildes == -1 || record__aio_complete(md, &cblocks[i])) { |
| if (sync_all) |
| aiocb[i] = NULL; |
| else |
| return i; |
| } else { |
| /* |
| * Started aio write is not complete yet |
| * so it has to be waited before the |
| * next allocation. |
| */ |
| aiocb[i] = &cblocks[i]; |
| do_suspend = 1; |
| } |
| } |
| if (!do_suspend) |
| return -1; |
| |
| while (aio_suspend((const struct aiocb **)aiocb, md->aio.nr_cblocks, &timeout)) { |
| if (!(errno == EAGAIN || errno == EINTR)) |
| pr_err("failed to sync perf data, error: %m\n"); |
| } |
| } while (1); |
| } |
| |
| struct record_aio { |
| struct record *rec; |
| void *data; |
| size_t size; |
| }; |
| |
| static int record__aio_pushfn(struct mmap *map, void *to, void *buf, size_t size) |
| { |
| struct record_aio *aio = to; |
| |
| /* |
| * map->core.base data pointed by buf is copied into free map->aio.data[] buffer |
| * to release space in the kernel buffer as fast as possible, calling |
| * perf_mmap__consume() from perf_mmap__push() function. |
| * |
| * That lets the kernel to proceed with storing more profiling data into |
| * the kernel buffer earlier than other per-cpu kernel buffers are handled. |
| * |
| * Coping can be done in two steps in case the chunk of profiling data |
| * crosses the upper bound of the kernel buffer. In this case we first move |
| * part of data from map->start till the upper bound and then the reminder |
| * from the beginning of the kernel buffer till the end of the data chunk. |
| */ |
| |
| if (record__comp_enabled(aio->rec)) { |
| size = zstd_compress(aio->rec->session, NULL, aio->data + aio->size, |
| mmap__mmap_len(map) - aio->size, |
| buf, size); |
| } else { |
| memcpy(aio->data + aio->size, buf, size); |
| } |
| |
| if (!aio->size) { |
| /* |
| * Increment map->refcount to guard map->aio.data[] buffer |
| * from premature deallocation because map object can be |
| * released earlier than aio write request started on |
| * map->aio.data[] buffer is complete. |
| * |
| * perf_mmap__put() is done at record__aio_complete() |
| * after started aio request completion or at record__aio_push() |
| * if the request failed to start. |
| */ |
| perf_mmap__get(&map->core); |
| } |
| |
| aio->size += size; |
| |
| return size; |
| } |
| |
| static int record__aio_push(struct record *rec, struct mmap *map, off_t *off) |
| { |
| int ret, idx; |
| int trace_fd = rec->session->data->file.fd; |
| struct record_aio aio = { .rec = rec, .size = 0 }; |
| |
| /* |
| * Call record__aio_sync() to wait till map->aio.data[] buffer |
| * becomes available after previous aio write operation. |
| */ |
| |
| idx = record__aio_sync(map, false); |
| aio.data = map->aio.data[idx]; |
| ret = perf_mmap__push(map, &aio, record__aio_pushfn); |
| if (ret != 0) /* ret > 0 - no data, ret < 0 - error */ |
| return ret; |
| |
| rec->samples++; |
| ret = record__aio_write(&(map->aio.cblocks[idx]), trace_fd, aio.data, aio.size, *off); |
| if (!ret) { |
| *off += aio.size; |
| rec->bytes_written += aio.size; |
| if (switch_output_size(rec)) |
| trigger_hit(&switch_output_trigger); |
| } else { |
| /* |
| * Decrement map->refcount incremented in record__aio_pushfn() |
| * back if record__aio_write() operation failed to start, otherwise |
| * map->refcount is decremented in record__aio_complete() after |
| * aio write operation finishes successfully. |
| */ |
| perf_mmap__put(&map->core); |
| } |
| |
| return ret; |
| } |
| |
| static off_t record__aio_get_pos(int trace_fd) |
| { |
| return lseek(trace_fd, 0, SEEK_CUR); |
| } |
| |
| static void record__aio_set_pos(int trace_fd, off_t pos) |
| { |
| lseek(trace_fd, pos, SEEK_SET); |
| } |
| |
| static void record__aio_mmap_read_sync(struct record *rec) |
| { |
| int i; |
| struct evlist *evlist = rec->evlist; |
| struct mmap *maps = evlist->mmap; |
| |
| if (!record__aio_enabled(rec)) |
| return; |
| |
| for (i = 0; i < evlist->core.nr_mmaps; i++) { |
| struct mmap *map = &maps[i]; |
| |
| if (map->core.base) |
| record__aio_sync(map, true); |
| } |
| } |
| |
| static int nr_cblocks_default = 1; |
| static int nr_cblocks_max = 4; |
| |
| static int record__aio_parse(const struct option *opt, |
| const char *str, |
| int unset) |
| { |
| struct record_opts *opts = (struct record_opts *)opt->value; |
| |
| if (unset) { |
| opts->nr_cblocks = 0; |
| } else { |
| if (str) |
| opts->nr_cblocks = strtol(str, NULL, 0); |
| if (!opts->nr_cblocks) |
| opts->nr_cblocks = nr_cblocks_default; |
| } |
| |
| return 0; |
| } |
| #else /* HAVE_AIO_SUPPORT */ |
| static int nr_cblocks_max = 0; |
| |
| static int record__aio_push(struct record *rec __maybe_unused, struct mmap *map __maybe_unused, |
| off_t *off __maybe_unused) |
| { |
| return -1; |
| } |
| |
| static off_t record__aio_get_pos(int trace_fd __maybe_unused) |
| { |
| return -1; |
| } |
| |
| static void record__aio_set_pos(int trace_fd __maybe_unused, off_t pos __maybe_unused) |
| { |
| } |
| |
| static void record__aio_mmap_read_sync(struct record *rec __maybe_unused) |
| { |
| } |
| #endif |
| |
| static int record__aio_enabled(struct record *rec) |
| { |
| return rec->opts.nr_cblocks > 0; |
| } |
| |
| #define MMAP_FLUSH_DEFAULT 1 |
| static int record__mmap_flush_parse(const struct option *opt, |
| const char *str, |
| int unset) |
| { |
| int flush_max; |
| struct record_opts *opts = (struct record_opts *)opt->value; |
| static struct parse_tag tags[] = { |
| { .tag = 'B', .mult = 1 }, |
| { .tag = 'K', .mult = 1 << 10 }, |
| { .tag = 'M', .mult = 1 << 20 }, |
| { .tag = 'G', .mult = 1 << 30 }, |
| { .tag = 0 }, |
| }; |
| |
| if (unset) |
| return 0; |
| |
| if (str) { |
| opts->mmap_flush = parse_tag_value(str, tags); |
| if (opts->mmap_flush == (int)-1) |
| opts->mmap_flush = strtol(str, NULL, 0); |
| } |
| |
| if (!opts->mmap_flush) |
| opts->mmap_flush = MMAP_FLUSH_DEFAULT; |
| |
| flush_max = evlist__mmap_size(opts->mmap_pages); |
| flush_max /= 4; |
| if (opts->mmap_flush > flush_max) |
| opts->mmap_flush = flush_max; |
| |
| return 0; |
| } |
| |
| #ifdef HAVE_ZSTD_SUPPORT |
| static unsigned int comp_level_default = 1; |
| |
| static int record__parse_comp_level(const struct option *opt, const char *str, int unset) |
| { |
| struct record_opts *opts = opt->value; |
| |
| if (unset) { |
| opts->comp_level = 0; |
| } else { |
| if (str) |
| opts->comp_level = strtol(str, NULL, 0); |
| if (!opts->comp_level) |
| opts->comp_level = comp_level_default; |
| } |
| |
| return 0; |
| } |
| #endif |
| static unsigned int comp_level_max = 22; |
| |
| static int record__comp_enabled(struct record *rec) |
| { |
| return rec->opts.comp_level > 0; |
| } |
| |
| static int process_synthesized_event(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample __maybe_unused, |
| struct machine *machine __maybe_unused) |
| { |
| struct record *rec = container_of(tool, struct record, tool); |
| return record__write(rec, NULL, event, event->header.size); |
| } |
| |
| static struct mutex synth_lock; |
| |
| static int process_locked_synthesized_event(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample __maybe_unused, |
| struct machine *machine __maybe_unused) |
| { |
| int ret; |
| |
| mutex_lock(&synth_lock); |
| ret = process_synthesized_event(tool, event, sample, machine); |
| mutex_unlock(&synth_lock); |
| return ret; |
| } |
| |
| static int record__pushfn(struct mmap *map, void *to, void *bf, size_t size) |
| { |
| struct record *rec = to; |
| |
| if (record__comp_enabled(rec)) { |
| size = zstd_compress(rec->session, map, map->data, mmap__mmap_len(map), bf, size); |
| bf = map->data; |
| } |
| |
| thread->samples++; |
| return record__write(rec, map, bf, size); |
| } |
| |
| static volatile int signr = -1; |
| static volatile int child_finished; |
| #ifdef HAVE_EVENTFD_SUPPORT |
| static volatile int done_fd = -1; |
| #endif |
| |
| static void sig_handler(int sig) |
| { |
| if (sig == SIGCHLD) |
| child_finished = 1; |
| else |
| signr = sig; |
| |
| done = 1; |
| #ifdef HAVE_EVENTFD_SUPPORT |
| if (done_fd >= 0) { |
| u64 tmp = 1; |
| int orig_errno = errno; |
| |
| /* |
| * It is possible for this signal handler to run after done is |
| * checked in the main loop, but before the perf counter fds are |
| * polled. If this happens, the poll() will continue to wait |
| * even though done is set, and will only break out if either |
| * another signal is received, or the counters are ready for |
| * read. To ensure the poll() doesn't sleep when done is set, |
| * use an eventfd (done_fd) to wake up the poll(). |
| */ |
| if (write(done_fd, &tmp, sizeof(tmp)) < 0) |
| pr_err("failed to signal wakeup fd, error: %m\n"); |
| |
| errno = orig_errno; |
| } |
| #endif // HAVE_EVENTFD_SUPPORT |
| } |
| |
| static void sigsegv_handler(int sig) |
| { |
| perf_hooks__recover(); |
| sighandler_dump_stack(sig); |
| } |
| |
| static void record__sig_exit(void) |
| { |
| if (signr == -1) |
| return; |
| |
| signal(signr, SIG_DFL); |
| raise(signr); |
| } |
| |
| #ifdef HAVE_AUXTRACE_SUPPORT |
| |
| static int record__process_auxtrace(struct perf_tool *tool, |
| struct mmap *map, |
| union perf_event *event, void *data1, |
| size_t len1, void *data2, size_t len2) |
| { |
| struct record *rec = container_of(tool, struct record, tool); |
| struct perf_data *data = &rec->data; |
| size_t padding; |
| u8 pad[8] = {0}; |
| |
| if (!perf_data__is_pipe(data) && perf_data__is_single_file(data)) { |
| off_t file_offset; |
| int fd = perf_data__fd(data); |
| int err; |
| |
| file_offset = lseek(fd, 0, SEEK_CUR); |
| if (file_offset == -1) |
| return -1; |
| err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index, |
| event, file_offset); |
| if (err) |
| return err; |
| } |
| |
| /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */ |
| padding = (len1 + len2) & 7; |
| if (padding) |
| padding = 8 - padding; |
| |
| record__write(rec, map, event, event->header.size); |
| record__write(rec, map, data1, len1); |
| if (len2) |
| record__write(rec, map, data2, len2); |
| record__write(rec, map, &pad, padding); |
| |
| return 0; |
| } |
| |
| static int record__auxtrace_mmap_read(struct record *rec, |
| struct mmap *map) |
| { |
| int ret; |
| |
| ret = auxtrace_mmap__read(map, rec->itr, &rec->tool, |
| record__process_auxtrace); |
| if (ret < 0) |
| return ret; |
| |
| if (ret) |
| rec->samples++; |
| |
| return 0; |
| } |
| |
| static int record__auxtrace_mmap_read_snapshot(struct record *rec, |
| struct mmap *map) |
| { |
| int ret; |
| |
| ret = auxtrace_mmap__read_snapshot(map, rec->itr, &rec->tool, |
| record__process_auxtrace, |
| rec->opts.auxtrace_snapshot_size); |
| if (ret < 0) |
| return ret; |
| |
| if (ret) |
| rec->samples++; |
| |
| return 0; |
| } |
| |
| static int record__auxtrace_read_snapshot_all(struct record *rec) |
| { |
| int i; |
| int rc = 0; |
| |
| for (i = 0; i < rec->evlist->core.nr_mmaps; i++) { |
| struct mmap *map = &rec->evlist->mmap[i]; |
| |
| if (!map->auxtrace_mmap.base) |
| continue; |
| |
| if (record__auxtrace_mmap_read_snapshot(rec, map) != 0) { |
| rc = -1; |
| goto out; |
| } |
| } |
| out: |
| return rc; |
| } |
| |
| static void record__read_auxtrace_snapshot(struct record *rec, bool on_exit) |
| { |
| pr_debug("Recording AUX area tracing snapshot\n"); |
| if (record__auxtrace_read_snapshot_all(rec) < 0) { |
| trigger_error(&auxtrace_snapshot_trigger); |
| } else { |
| if (auxtrace_record__snapshot_finish(rec->itr, on_exit)) |
| trigger_error(&auxtrace_snapshot_trigger); |
| else |
| trigger_ready(&auxtrace_snapshot_trigger); |
| } |
| } |
| |
| static int record__auxtrace_snapshot_exit(struct record *rec) |
| { |
| if (trigger_is_error(&auxtrace_snapshot_trigger)) |
| return 0; |
| |
| if (!auxtrace_record__snapshot_started && |
| auxtrace_record__snapshot_start(rec->itr)) |
| return -1; |
| |
| record__read_auxtrace_snapshot(rec, true); |
| if (trigger_is_error(&auxtrace_snapshot_trigger)) |
| return -1; |
| |
| return 0; |
| } |
| |
| static int record__auxtrace_init(struct record *rec) |
| { |
| int err; |
| |
| if ((rec->opts.auxtrace_snapshot_opts || rec->opts.auxtrace_sample_opts) |
| && record__threads_enabled(rec)) { |
| pr_err("AUX area tracing options are not available in parallel streaming mode.\n"); |
| return -EINVAL; |
| } |
| |
| if (!rec->itr) { |
| rec->itr = auxtrace_record__init(rec->evlist, &err); |
| if (err) |
| return err; |
| } |
| |
| err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts, |
| rec->opts.auxtrace_snapshot_opts); |
| if (err) |
| return err; |
| |
| err = auxtrace_parse_sample_options(rec->itr, rec->evlist, &rec->opts, |
| rec->opts.auxtrace_sample_opts); |
| if (err) |
| return err; |
| |
| auxtrace_regroup_aux_output(rec->evlist); |
| |
| return auxtrace_parse_filters(rec->evlist); |
| } |
| |
| #else |
| |
| static inline |
| int record__auxtrace_mmap_read(struct record *rec __maybe_unused, |
| struct mmap *map __maybe_unused) |
| { |
| return 0; |
| } |
| |
| static inline |
| void record__read_auxtrace_snapshot(struct record *rec __maybe_unused, |
| bool on_exit __maybe_unused) |
| { |
| } |
| |
| static inline |
| int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused) |
| { |
| return 0; |
| } |
| |
| static inline |
| int record__auxtrace_snapshot_exit(struct record *rec __maybe_unused) |
| { |
| return 0; |
| } |
| |
| static int record__auxtrace_init(struct record *rec __maybe_unused) |
| { |
| return 0; |
| } |
| |
| #endif |
| |
| static int record__config_text_poke(struct evlist *evlist) |
| { |
| struct evsel *evsel; |
| |
| /* Nothing to do if text poke is already configured */ |
| evlist__for_each_entry(evlist, evsel) { |
| if (evsel->core.attr.text_poke) |
| return 0; |
| } |
| |
| evsel = evlist__add_dummy_on_all_cpus(evlist); |
| if (!evsel) |
| return -ENOMEM; |
| |
| evsel->core.attr.text_poke = 1; |
| evsel->core.attr.ksymbol = 1; |
| evsel->immediate = true; |
| evsel__set_sample_bit(evsel, TIME); |
| |
| return 0; |
| } |
| |
| static int record__config_off_cpu(struct record *rec) |
| { |
| return off_cpu_prepare(rec->evlist, &rec->opts.target, &rec->opts); |
| } |
| |
| static bool record__kcore_readable(struct machine *machine) |
| { |
| char kcore[PATH_MAX]; |
| int fd; |
| |
| scnprintf(kcore, sizeof(kcore), "%s/proc/kcore", machine->root_dir); |
| |
| fd = open(kcore, O_RDONLY); |
| if (fd < 0) |
| return false; |
| |
| close(fd); |
| |
| return true; |
| } |
| |
| static int record__kcore_copy(struct machine *machine, struct perf_data *data) |
| { |
| char from_dir[PATH_MAX]; |
| char kcore_dir[PATH_MAX]; |
| int ret; |
| |
| snprintf(from_dir, sizeof(from_dir), "%s/proc", machine->root_dir); |
| |
| ret = perf_data__make_kcore_dir(data, kcore_dir, sizeof(kcore_dir)); |
| if (ret) |
| return ret; |
| |
| return kcore_copy(from_dir, kcore_dir); |
| } |
| |
| static void record__thread_data_init_pipes(struct record_thread *thread_data) |
| { |
| thread_data->pipes.msg[0] = -1; |
| thread_data->pipes.msg[1] = -1; |
| thread_data->pipes.ack[0] = -1; |
| thread_data->pipes.ack[1] = -1; |
| } |
| |
| static int record__thread_data_open_pipes(struct record_thread *thread_data) |
| { |
| if (pipe(thread_data->pipes.msg)) |
| return -EINVAL; |
| |
| if (pipe(thread_data->pipes.ack)) { |
| close(thread_data->pipes.msg[0]); |
| thread_data->pipes.msg[0] = -1; |
| close(thread_data->pipes.msg[1]); |
| thread_data->pipes.msg[1] = -1; |
| return -EINVAL; |
| } |
| |
| pr_debug2("thread_data[%p]: msg=[%d,%d], ack=[%d,%d]\n", thread_data, |
| thread_data->pipes.msg[0], thread_data->pipes.msg[1], |
| thread_data->pipes.ack[0], thread_data->pipes.ack[1]); |
| |
| return 0; |
| } |
| |
| static void record__thread_data_close_pipes(struct record_thread *thread_data) |
| { |
| if (thread_data->pipes.msg[0] != -1) { |
| close(thread_data->pipes.msg[0]); |
| thread_data->pipes.msg[0] = -1; |
| } |
| if (thread_data->pipes.msg[1] != -1) { |
| close(thread_data->pipes.msg[1]); |
| thread_data->pipes.msg[1] = -1; |
| } |
| if (thread_data->pipes.ack[0] != -1) { |
| close(thread_data->pipes.ack[0]); |
| thread_data->pipes.ack[0] = -1; |
| } |
| if (thread_data->pipes.ack[1] != -1) { |
| close(thread_data->pipes.ack[1]); |
| thread_data->pipes.ack[1] = -1; |
| } |
| } |
| |
| static bool evlist__per_thread(struct evlist *evlist) |
| { |
| return cpu_map__is_dummy(evlist->core.user_requested_cpus); |
| } |
| |
| static int record__thread_data_init_maps(struct record_thread *thread_data, struct evlist *evlist) |
| { |
| int m, tm, nr_mmaps = evlist->core.nr_mmaps; |
| struct mmap *mmap = evlist->mmap; |
| struct mmap *overwrite_mmap = evlist->overwrite_mmap; |
| struct perf_cpu_map *cpus = evlist->core.all_cpus; |
| bool per_thread = evlist__per_thread(evlist); |
| |
| if (per_thread) |
| thread_data->nr_mmaps = nr_mmaps; |
| else |
| thread_data->nr_mmaps = bitmap_weight(thread_data->mask->maps.bits, |
| thread_data->mask->maps.nbits); |
| if (mmap) { |
| thread_data->maps = zalloc(thread_data->nr_mmaps * sizeof(struct mmap *)); |
| if (!thread_data->maps) |
| return -ENOMEM; |
| } |
| if (overwrite_mmap) { |
| thread_data->overwrite_maps = zalloc(thread_data->nr_mmaps * sizeof(struct mmap *)); |
| if (!thread_data->overwrite_maps) { |
| zfree(&thread_data->maps); |
| return -ENOMEM; |
| } |
| } |
| pr_debug2("thread_data[%p]: nr_mmaps=%d, maps=%p, ow_maps=%p\n", thread_data, |
| thread_data->nr_mmaps, thread_data->maps, thread_data->overwrite_maps); |
| |
| for (m = 0, tm = 0; m < nr_mmaps && tm < thread_data->nr_mmaps; m++) { |
| if (per_thread || |
| test_bit(perf_cpu_map__cpu(cpus, m).cpu, thread_data->mask->maps.bits)) { |
| if (thread_data->maps) { |
| thread_data->maps[tm] = &mmap[m]; |
| pr_debug2("thread_data[%p]: cpu%d: maps[%d] -> mmap[%d]\n", |
| thread_data, perf_cpu_map__cpu(cpus, m).cpu, tm, m); |
| } |
| if (thread_data->overwrite_maps) { |
| thread_data->overwrite_maps[tm] = &overwrite_mmap[m]; |
| pr_debug2("thread_data[%p]: cpu%d: ow_maps[%d] -> ow_mmap[%d]\n", |
| thread_data, perf_cpu_map__cpu(cpus, m).cpu, tm, m); |
| } |
| tm++; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int record__thread_data_init_pollfd(struct record_thread *thread_data, struct evlist *evlist) |
| { |
| int f, tm, pos; |
| struct mmap *map, *overwrite_map; |
| |
| fdarray__init(&thread_data->pollfd, 64); |
| |
| for (tm = 0; tm < thread_data->nr_mmaps; tm++) { |
| map = thread_data->maps ? thread_data->maps[tm] : NULL; |
| overwrite_map = thread_data->overwrite_maps ? |
| thread_data->overwrite_maps[tm] : NULL; |
| |
| for (f = 0; f < evlist->core.pollfd.nr; f++) { |
| void *ptr = evlist->core.pollfd.priv[f].ptr; |
| |
| if ((map && ptr == map) || (overwrite_map && ptr == overwrite_map)) { |
| pos = fdarray__dup_entry_from(&thread_data->pollfd, f, |
| &evlist->core.pollfd); |
| if (pos < 0) |
| return pos; |
| pr_debug2("thread_data[%p]: pollfd[%d] <- event_fd=%d\n", |
| thread_data, pos, evlist->core.pollfd.entries[f].fd); |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void record__free_thread_data(struct record *rec) |
| { |
| int t; |
| struct record_thread *thread_data = rec->thread_data; |
| |
| if (thread_data == NULL) |
| return; |
| |
| for (t = 0; t < rec->nr_threads; t++) { |
| record__thread_data_close_pipes(&thread_data[t]); |
| zfree(&thread_data[t].maps); |
| zfree(&thread_data[t].overwrite_maps); |
| fdarray__exit(&thread_data[t].pollfd); |
| } |
| |
| zfree(&rec->thread_data); |
| } |
| |
| static int record__map_thread_evlist_pollfd_indexes(struct record *rec, |
| int evlist_pollfd_index, |
| int thread_pollfd_index) |
| { |
| size_t x = rec->index_map_cnt; |
| |
| if (realloc_array_as_needed(rec->index_map, rec->index_map_sz, x, NULL)) |
| return -ENOMEM; |
| rec->index_map[x].evlist_pollfd_index = evlist_pollfd_index; |
| rec->index_map[x].thread_pollfd_index = thread_pollfd_index; |
| rec->index_map_cnt += 1; |
| return 0; |
| } |
| |
| static int record__update_evlist_pollfd_from_thread(struct record *rec, |
| struct evlist *evlist, |
| struct record_thread *thread_data) |
| { |
| struct pollfd *e_entries = evlist->core.pollfd.entries; |
| struct pollfd *t_entries = thread_data->pollfd.entries; |
| int err = 0; |
| size_t i; |
| |
| for (i = 0; i < rec->index_map_cnt; i++) { |
| int e_pos = rec->index_map[i].evlist_pollfd_index; |
| int t_pos = rec->index_map[i].thread_pollfd_index; |
| |
| if (e_entries[e_pos].fd != t_entries[t_pos].fd || |
| e_entries[e_pos].events != t_entries[t_pos].events) { |
| pr_err("Thread and evlist pollfd index mismatch\n"); |
| err = -EINVAL; |
| continue; |
| } |
| e_entries[e_pos].revents = t_entries[t_pos].revents; |
| } |
| return err; |
| } |
| |
| static int record__dup_non_perf_events(struct record *rec, |
| struct evlist *evlist, |
| struct record_thread *thread_data) |
| { |
| struct fdarray *fda = &evlist->core.pollfd; |
| int i, ret; |
| |
| for (i = 0; i < fda->nr; i++) { |
| if (!(fda->priv[i].flags & fdarray_flag__non_perf_event)) |
| continue; |
| ret = fdarray__dup_entry_from(&thread_data->pollfd, i, fda); |
| if (ret < 0) { |
| pr_err("Failed to duplicate descriptor in main thread pollfd\n"); |
| return ret; |
| } |
| pr_debug2("thread_data[%p]: pollfd[%d] <- non_perf_event fd=%d\n", |
| thread_data, ret, fda->entries[i].fd); |
| ret = record__map_thread_evlist_pollfd_indexes(rec, i, ret); |
| if (ret < 0) { |
| pr_err("Failed to map thread and evlist pollfd indexes\n"); |
| return ret; |
| } |
| } |
| return 0; |
| } |
| |
| static int record__alloc_thread_data(struct record *rec, struct evlist *evlist) |
| { |
| int t, ret; |
| struct record_thread *thread_data; |
| |
| rec->thread_data = zalloc(rec->nr_threads * sizeof(*(rec->thread_data))); |
| if (!rec->thread_data) { |
| pr_err("Failed to allocate thread data\n"); |
| return -ENOMEM; |
| } |
| thread_data = rec->thread_data; |
| |
| for (t = 0; t < rec->nr_threads; t++) |
| record__thread_data_init_pipes(&thread_data[t]); |
| |
| for (t = 0; t < rec->nr_threads; t++) { |
| thread_data[t].rec = rec; |
| thread_data[t].mask = &rec->thread_masks[t]; |
| ret = record__thread_data_init_maps(&thread_data[t], evlist); |
| if (ret) { |
| pr_err("Failed to initialize thread[%d] maps\n", t); |
| goto out_free; |
| } |
| ret = record__thread_data_init_pollfd(&thread_data[t], evlist); |
| if (ret) { |
| pr_err("Failed to initialize thread[%d] pollfd\n", t); |
| goto out_free; |
| } |
| if (t) { |
| thread_data[t].tid = -1; |
| ret = record__thread_data_open_pipes(&thread_data[t]); |
| if (ret) { |
| pr_err("Failed to open thread[%d] communication pipes\n", t); |
| goto out_free; |
| } |
| ret = fdarray__add(&thread_data[t].pollfd, thread_data[t].pipes.msg[0], |
| POLLIN | POLLERR | POLLHUP, fdarray_flag__nonfilterable); |
| if (ret < 0) { |
| pr_err("Failed to add descriptor to thread[%d] pollfd\n", t); |
| goto out_free; |
| } |
| thread_data[t].ctlfd_pos = ret; |
| pr_debug2("thread_data[%p]: pollfd[%d] <- ctl_fd=%d\n", |
| thread_data, thread_data[t].ctlfd_pos, |
| thread_data[t].pipes.msg[0]); |
| } else { |
| thread_data[t].tid = gettid(); |
| |
| ret = record__dup_non_perf_events(rec, evlist, &thread_data[t]); |
| if (ret < 0) |
| goto out_free; |
| |
| thread_data[t].ctlfd_pos = -1; /* Not used */ |
| } |
| } |
| |
| return 0; |
| |
| out_free: |
| record__free_thread_data(rec); |
| |
| return ret; |
| } |
| |
| static int record__mmap_evlist(struct record *rec, |
| struct evlist *evlist) |
| { |
| int i, ret; |
| struct record_opts *opts = &rec->opts; |
| bool auxtrace_overwrite = opts->auxtrace_snapshot_mode || |
| opts->auxtrace_sample_mode; |
| char msg[512]; |
| |
| if (opts->affinity != PERF_AFFINITY_SYS) |
| cpu__setup_cpunode_map(); |
| |
| if (evlist__mmap_ex(evlist, opts->mmap_pages, |
| opts->auxtrace_mmap_pages, |
| auxtrace_overwrite, |
| opts->nr_cblocks, opts->affinity, |
| opts->mmap_flush, opts->comp_level) < 0) { |
| if (errno == EPERM) { |
| pr_err("Permission error mapping pages.\n" |
| "Consider increasing " |
| "/proc/sys/kernel/perf_event_mlock_kb,\n" |
| "or try again with a smaller value of -m/--mmap_pages.\n" |
| "(current value: %u,%u)\n", |
| opts->mmap_pages, opts->auxtrace_mmap_pages); |
| return -errno; |
| } else { |
| pr_err("failed to mmap with %d (%s)\n", errno, |
| str_error_r(errno, msg, sizeof(msg))); |
| if (errno) |
| return -errno; |
| else |
| return -EINVAL; |
| } |
| } |
| |
| if (evlist__initialize_ctlfd(evlist, opts->ctl_fd, opts->ctl_fd_ack)) |
| return -1; |
| |
| ret = record__alloc_thread_data(rec, evlist); |
| if (ret) |
| return ret; |
| |
| if (record__threads_enabled(rec)) { |
| ret = perf_data__create_dir(&rec->data, evlist->core.nr_mmaps); |
| if (ret) { |
| pr_err("Failed to create data directory: %s\n", strerror(-ret)); |
| return ret; |
| } |
| for (i = 0; i < evlist->core.nr_mmaps; i++) { |
| if (evlist->mmap) |
| evlist->mmap[i].file = &rec->data.dir.files[i]; |
| if (evlist->overwrite_mmap) |
| evlist->overwrite_mmap[i].file = &rec->data.dir.files[i]; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int record__mmap(struct record *rec) |
| { |
| return record__mmap_evlist(rec, rec->evlist); |
| } |
| |
| static int record__open(struct record *rec) |
| { |
| char msg[BUFSIZ]; |
| struct evsel *pos; |
| struct evlist *evlist = rec->evlist; |
| struct perf_session *session = rec->session; |
| struct record_opts *opts = &rec->opts; |
| int rc = 0; |
| |
| /* |
| * For initial_delay, system wide or a hybrid system, we need to add a |
| * dummy event so that we can track PERF_RECORD_MMAP to cover the delay |
| * of waiting or event synthesis. |
| */ |
| if (opts->initial_delay || target__has_cpu(&opts->target) || |
| perf_pmu__has_hybrid()) { |
| pos = evlist__get_tracking_event(evlist); |
| if (!evsel__is_dummy_event(pos)) { |
| /* Set up dummy event. */ |
| if (evlist__add_dummy(evlist)) |
| return -ENOMEM; |
| pos = evlist__last(evlist); |
| evlist__set_tracking_event(evlist, pos); |
| } |
| |
| /* |
| * Enable the dummy event when the process is forked for |
| * initial_delay, immediately for system wide. |
| */ |
| if (opts->initial_delay && !pos->immediate && |
| !target__has_cpu(&opts->target)) |
| pos->core.attr.enable_on_exec = 1; |
| else |
| pos->immediate = 1; |
| } |
| |
| evlist__config(evlist, opts, &callchain_param); |
| |
| evlist__for_each_entry(evlist, pos) { |
| try_again: |
| if (evsel__open(pos, pos->core.cpus, pos->core.threads) < 0) { |
| if (evsel__fallback(pos, errno, msg, sizeof(msg))) { |
| if (verbose > 0) |
| ui__warning("%s\n", msg); |
| goto try_again; |
| } |
| if ((errno == EINVAL || errno == EBADF) && |
| pos->core.leader != &pos->core && |
| pos->weak_group) { |
| pos = evlist__reset_weak_group(evlist, pos, true); |
| goto try_again; |
| } |
| rc = -errno; |
| evsel__open_strerror(pos, &opts->target, errno, msg, sizeof(msg)); |
| ui__error("%s\n", msg); |
| goto out; |
| } |
| |
| pos->supported = true; |
| } |
| |
| if (symbol_conf.kptr_restrict && !evlist__exclude_kernel(evlist)) { |
| pr_warning( |
| "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" |
| "check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n" |
| "Samples in kernel functions may not be resolved if a suitable vmlinux\n" |
| "file is not found in the buildid cache or in the vmlinux path.\n\n" |
| "Samples in kernel modules won't be resolved at all.\n\n" |
| "If some relocation was applied (e.g. kexec) symbols may be misresolved\n" |
| "even with a suitable vmlinux or kallsyms file.\n\n"); |
| } |
| |
| if (evlist__apply_filters(evlist, &pos)) { |
| pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", |
| pos->filter, evsel__name(pos), errno, |
| str_error_r(errno, msg, sizeof(msg))); |
| rc = -1; |
| goto out; |
| } |
| |
| rc = record__mmap(rec); |
| if (rc) |
| goto out; |
| |
| session->evlist = evlist; |
| perf_session__set_id_hdr_size(session); |
| out: |
| return rc; |
| } |
| |
| static void set_timestamp_boundary(struct record *rec, u64 sample_time) |
| { |
| if (rec->evlist->first_sample_time == 0) |
| rec->evlist->first_sample_time = sample_time; |
| |
| if (sample_time) |
| rec->evlist->last_sample_time = sample_time; |
| } |
| |
| static int process_sample_event(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct evsel *evsel, |
| struct machine *machine) |
| { |
| struct record *rec = container_of(tool, struct record, tool); |
| |
| set_timestamp_boundary(rec, sample->time); |
| |
| if (rec->buildid_all) |
| return 0; |
| |
| rec->samples++; |
| return build_id__mark_dso_hit(tool, event, sample, evsel, machine); |
| } |
| |
| static int process_buildids(struct record *rec) |
| { |
| struct perf_session *session = rec->session; |
| |
| if (perf_data__size(&rec->data) == 0) |
| return 0; |
| |
| /* |
| * During this process, it'll load kernel map and replace the |
| * dso->long_name to a real pathname it found. In this case |
| * we prefer the vmlinux path like |
| * /lib/modules/3.16.4/build/vmlinux |
| * |
| * rather than build-id path (in debug directory). |
| * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551 |
| */ |
| symbol_conf.ignore_vmlinux_buildid = true; |
| |
| /* |
| * If --buildid-all is given, it marks all DSO regardless of hits, |
| * so no need to process samples. But if timestamp_boundary is enabled, |
| * it still needs to walk on all samples to get the timestamps of |
| * first/last samples. |
| */ |
| if (rec->buildid_all && !rec->timestamp_boundary) |
| rec->tool.sample = NULL; |
| |
| return perf_session__process_events(session); |
| } |
| |
| static void perf_event__synthesize_guest_os(struct machine *machine, void *data) |
| { |
| int err; |
| struct perf_tool *tool = data; |
| /* |
| *As for guest kernel when processing subcommand record&report, |
| *we arrange module mmap prior to guest kernel mmap and trigger |
| *a preload dso because default guest module symbols are loaded |
| *from guest kallsyms instead of /lib/modules/XXX/XXX. This |
| *method is used to avoid symbol missing when the first addr is |
| *in module instead of in guest kernel. |
| */ |
| err = perf_event__synthesize_modules(tool, process_synthesized_event, |
| machine); |
| if (err < 0) |
| pr_err("Couldn't record guest kernel [%d]'s reference" |
| " relocation symbol.\n", machine->pid); |
| |
| /* |
| * We use _stext for guest kernel because guest kernel's /proc/kallsyms |
| * have no _text sometimes. |
| */ |
| err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
| machine); |
| if (err < 0) |
| pr_err("Couldn't record guest kernel [%d]'s reference" |
| " relocation symbol.\n", machine->pid); |
| } |
| |
| static struct perf_event_header finished_round_event = { |
| .size = sizeof(struct perf_event_header), |
| .type = PERF_RECORD_FINISHED_ROUND, |
| }; |
| |
| static struct perf_event_header finished_init_event = { |
| .size = sizeof(struct perf_event_header), |
| .type = PERF_RECORD_FINISHED_INIT, |
| }; |
| |
| static void record__adjust_affinity(struct record *rec, struct mmap *map) |
| { |
| if (rec->opts.affinity != PERF_AFFINITY_SYS && |
| !bitmap_equal(thread->mask->affinity.bits, map->affinity_mask.bits, |
| thread->mask->affinity.nbits)) { |
| bitmap_zero(thread->mask->affinity.bits, thread->mask->affinity.nbits); |
| bitmap_or(thread->mask->affinity.bits, thread->mask->affinity.bits, |
| map->affinity_mask.bits, thread->mask->affinity.nbits); |
| sched_setaffinity(0, MMAP_CPU_MASK_BYTES(&thread->mask->affinity), |
| (cpu_set_t *)thread->mask->affinity.bits); |
| if (verbose == 2) { |
| pr_debug("threads[%d]: running on cpu%d: ", thread->tid, sched_getcpu()); |
| mmap_cpu_mask__scnprintf(&thread->mask->affinity, "affinity"); |
| } |
| } |
| } |
| |
| static size_t process_comp_header(void *record, size_t increment) |
| { |
| struct perf_record_compressed *event = record; |
| size_t size = sizeof(*event); |
| |
| if (increment) { |
| event->header.size += increment; |
| return increment; |
| } |
| |
| event->header.type = PERF_RECORD_COMPRESSED; |
| event->header.size = size; |
| |
| return size; |
| } |
| |
| static size_t zstd_compress(struct perf_session *session, struct mmap *map, |
| void *dst, size_t dst_size, void *src, size_t src_size) |
| { |
| size_t compressed; |
| size_t max_record_size = PERF_SAMPLE_MAX_SIZE - sizeof(struct perf_record_compressed) - 1; |
| struct zstd_data *zstd_data = &session->zstd_data; |
| |
| if (map && map->file) |
| zstd_data = &map->zstd_data; |
| |
| compressed = zstd_compress_stream_to_records(zstd_data, dst, dst_size, src, src_size, |
| max_record_size, process_comp_header); |
| |
| if (map && map->file) { |
| thread->bytes_transferred += src_size; |
| thread->bytes_compressed += compressed; |
| } else { |
| session->bytes_transferred += src_size; |
| session->bytes_compressed += compressed; |
| } |
| |
| return compressed; |
| } |
| |
| static int record__mmap_read_evlist(struct record *rec, struct evlist *evlist, |
| bool overwrite, bool synch) |
| { |
| u64 bytes_written = rec->bytes_written; |
| int i; |
| int rc = 0; |
| int nr_mmaps; |
| struct mmap **maps; |
| int trace_fd = rec->data.file.fd; |
| off_t off = 0; |
| |
| if (!evlist) |
| return 0; |
| |
| nr_mmaps = thread->nr_mmaps; |
| maps = overwrite ? thread->overwrite_maps : thread->maps; |
| |
| if (!maps) |
| return 0; |
| |
| if (overwrite && evlist->bkw_mmap_state != BKW_MMAP_DATA_PENDING) |
| return 0; |
| |
| if (record__aio_enabled(rec)) |
| off = record__aio_get_pos(trace_fd); |
| |
| for (i = 0; i < nr_mmaps; i++) { |
| u64 flush = 0; |
| struct mmap *map = maps[i]; |
| |
| if (map->core.base) { |
| record__adjust_affinity(rec, map); |
| if (synch) { |
| flush = map->core.flush; |
| map->core.flush = 1; |
| } |
| if (!record__aio_enabled(rec)) { |
| if (perf_mmap__push(map, rec, record__pushfn) < 0) { |
| if (synch) |
| map->core.flush = flush; |
| rc = -1; |
| goto out; |
| } |
| } else { |
| if (record__aio_push(rec, map, &off) < 0) { |
| record__aio_set_pos(trace_fd, off); |
| if (synch) |
| map->core.flush = flush; |
| rc = -1; |
| goto out; |
| } |
| } |
| if (synch) |
| map->core.flush = flush; |
| } |
| |
| if (map->auxtrace_mmap.base && !rec->opts.auxtrace_snapshot_mode && |
| !rec->opts.auxtrace_sample_mode && |
| record__auxtrace_mmap_read(rec, map) != 0) { |
| rc = -1; |
| goto out; |
| } |
| } |
| |
| if (record__aio_enabled(rec)) |
| record__aio_set_pos(trace_fd, off); |
| |
| /* |
| * Mark the round finished in case we wrote |
| * at least one event. |
| * |
| * No need for round events in directory mode, |
| * because per-cpu maps and files have data |
| * sorted by kernel. |
| */ |
| if (!record__threads_enabled(rec) && bytes_written != rec->bytes_written) |
| rc = record__write(rec, NULL, &finished_round_event, sizeof(finished_round_event)); |
| |
| if (overwrite) |
| evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY); |
| out: |
| return rc; |
| } |
| |
| static int record__mmap_read_all(struct record *rec, bool synch) |
| { |
| int err; |
| |
| err = record__mmap_read_evlist(rec, rec->evlist, false, synch); |
| if (err) |
| return err; |
| |
| return record__mmap_read_evlist(rec, rec->evlist, true, synch); |
| } |
| |
| static void record__thread_munmap_filtered(struct fdarray *fda, int fd, |
| void *arg __maybe_unused) |
| { |
| struct perf_mmap *map = fda->priv[fd].ptr; |
| |
| if (map) |
| perf_mmap__put(map); |
| } |
| |
| static void *record__thread(void *arg) |
| { |
| enum thread_msg msg = THREAD_MSG__READY; |
| bool terminate = false; |
| struct fdarray *pollfd; |
| int err, ctlfd_pos; |
| |
| thread = arg; |
| thread->tid = gettid(); |
| |
| err = write(thread->pipes.ack[1], &msg, sizeof(msg)); |
| if (err == -1) |
| pr_warning("threads[%d]: failed to notify on start: %s\n", |
| thread->tid, strerror(errno)); |
| |
| pr_debug("threads[%d]: started on cpu%d\n", thread->tid, sched_getcpu()); |
| |
| pollfd = &thread->pollfd; |
| ctlfd_pos = thread->ctlfd_pos; |
| |
| for (;;) { |
| unsigned long long hits = thread->samples; |
| |
| if (record__mmap_read_all(thread->rec, false) < 0 || terminate) |
| break; |
| |
| if (hits == thread->samples) { |
| |
| err = fdarray__poll(pollfd, -1); |
| /* |
| * Propagate error, only if there's any. Ignore positive |
| * number of returned events and interrupt error. |
| */ |
| if (err > 0 || (err < 0 && errno == EINTR)) |
| err = 0; |
| thread->waking++; |
| |
| if (fdarray__filter(pollfd, POLLERR | POLLHUP, |
| record__thread_munmap_filtered, NULL) == 0) |
| break; |
| } |
| |
| if (pollfd->entries[ctlfd_pos].revents & POLLHUP) { |
| terminate = true; |
| close(thread->pipes.msg[0]); |
| thread->pipes.msg[0] = -1; |
| pollfd->entries[ctlfd_pos].fd = -1; |
| pollfd->entries[ctlfd_pos].events = 0; |
| } |
| |
| pollfd->entries[ctlfd_pos].revents = 0; |
| } |
| record__mmap_read_all(thread->rec, true); |
| |
| err = write(thread->pipes.ack[1], &msg, sizeof(msg)); |
| if (err == -1) |
| pr_warning("threads[%d]: failed to notify on termination: %s\n", |
| thread->tid, strerror(errno)); |
| |
| return NULL; |
| } |
| |
| static void record__init_features(struct record *rec) |
| { |
| struct perf_session *session = rec->session; |
| int feat; |
| |
| for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) |
| perf_header__set_feat(&session->header, feat); |
| |
| if (rec->no_buildid) |
| perf_header__clear_feat(&session->header, HEADER_BUILD_ID); |
| |
| if (!have_tracepoints(&rec->evlist->core.entries)) |
| perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); |
| |
| if (!rec->opts.branch_stack) |
| perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); |
| |
| if (!rec->opts.full_auxtrace) |
| perf_header__clear_feat(&session->header, HEADER_AUXTRACE); |
| |
| if (!(rec->opts.use_clockid && rec->opts.clockid_res_ns)) |
| perf_header__clear_feat(&session->header, HEADER_CLOCKID); |
| |
| if (!rec->opts.use_clockid) |
| perf_header__clear_feat(&session->header, HEADER_CLOCK_DATA); |
| |
| if (!record__threads_enabled(rec)) |
| perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT); |
| |
| if (!record__comp_enabled(rec)) |
| perf_header__clear_feat(&session->header, HEADER_COMPRESSED); |
| |
| perf_header__clear_feat(&session->header, HEADER_STAT); |
| } |
| |
| static void |
| record__finish_output(struct record *rec) |
| { |
| int i; |
| struct perf_data *data = &rec->data; |
| int fd = perf_data__fd(data); |
| |
| if (data->is_pipe) |
| return; |
| |
| rec->session->header.data_size += rec->bytes_written; |
| data->file.size = lseek(perf_data__fd(data), 0, SEEK_CUR); |
| if (record__threads_enabled(rec)) { |
| for (i = 0; i < data->dir.nr; i++) |
| data->dir.files[i].size = lseek(data->dir.files[i].fd, 0, SEEK_CUR); |
| } |
| |
| if (!rec->no_buildid) { |
| process_buildids(rec); |
| |
| if (rec->buildid_all) |
| dsos__hit_all(rec->session); |
| } |
| perf_session__write_header(rec->session, rec->evlist, fd, true); |
| |
| return; |
| } |
| |
| static int record__synthesize_workload(struct record *rec, bool tail) |
| { |
| int err; |
| struct perf_thread_map *thread_map; |
| bool needs_mmap = rec->opts.synth & PERF_SYNTH_MMAP; |
| |
| if (rec->opts.tail_synthesize != tail) |
| return 0; |
| |
| thread_map = thread_map__new_by_tid(rec->evlist->workload.pid); |
| if (thread_map == NULL) |
| return -1; |
| |
| err = perf_event__synthesize_thread_map(&rec->tool, thread_map, |
| process_synthesized_event, |
| &rec->session->machines.host, |
| needs_mmap, |
| rec->opts.sample_address); |
| perf_thread_map__put(thread_map); |
| return err; |
| } |
| |
| static int write_finished_init(struct record *rec, bool tail) |
| { |
| if (rec->opts.tail_synthesize != tail) |
| return 0; |
| |
| return record__write(rec, NULL, &finished_init_event, sizeof(finished_init_event)); |
| } |
| |
| static int record__synthesize(struct record *rec, bool tail); |
| |
| static int |
| record__switch_output(struct record *rec, bool at_exit) |
| { |
| struct perf_data *data = &rec->data; |
| int fd, err; |
| char *new_filename; |
| |
| /* Same Size: "2015122520103046"*/ |
| char timestamp[] = "InvalidTimestamp"; |
| |
| record__aio_mmap_read_sync(rec); |
| |
| write_finished_init(rec, true); |
| |
| record__synthesize(rec, true); |
| if (target__none(&rec->opts.target)) |
| record__synthesize_workload(rec, true); |
| |
| rec->samples = 0; |
| record__finish_output(rec); |
| err = fetch_current_timestamp(timestamp, sizeof(timestamp)); |
| if (err) { |
| pr_err("Failed to get current timestamp\n"); |
| return -EINVAL; |
| } |
| |
| fd = perf_data__switch(data, timestamp, |
| rec->session->header.data_offset, |
| at_exit, &new_filename); |
| if (fd >= 0 && !at_exit) { |
| rec->bytes_written = 0; |
| rec->session->header.data_size = 0; |
| } |
| |
| if (!quiet) |
| fprintf(stderr, "[ perf record: Dump %s.%s ]\n", |
| data->path, timestamp); |
| |
| if (rec->switch_output.num_files) { |
| int n = rec->switch_output.cur_file + 1; |
| |
| if (n >= rec->switch_output.num_files) |
| n = 0; |
| rec->switch_output.cur_file = n; |
| if (rec->switch_output.filenames[n]) { |
| remove(rec->switch_output.filenames[n]); |
| zfree(&rec->switch_output.filenames[n]); |
| } |
| rec->switch_output.filenames[n] = new_filename; |
| } else { |
| free(new_filename); |
| } |
| |
| /* Output tracking events */ |
| if (!at_exit) { |
| record__synthesize(rec, false); |
| |
| /* |
| * In 'perf record --switch-output' without -a, |
| * record__synthesize() in record__switch_output() won't |
| * generate tracking events because there's no thread_map |
| * in evlist. Which causes newly created perf.data doesn't |
| * contain map and comm information. |
| * Create a fake thread_map and directly call |
| * perf_event__synthesize_thread_map() for those events. |
| */ |
| if (target__none(&rec->opts.target)) |
| record__synthesize_workload(rec, false); |
| write_finished_init(rec, false); |
| } |
| return fd; |
| } |
| |
| static void __record__read_lost_samples(struct record *rec, struct evsel *evsel, |
| struct perf_record_lost_samples *lost, |
| int cpu_idx, int thread_idx) |
| { |
| struct perf_counts_values count; |
| struct perf_sample_id *sid; |
| struct perf_sample sample = {}; |
| int id_hdr_size; |
| |
| if (perf_evsel__read(&evsel->core, cpu_idx, thread_idx, &count) < 0) { |
| pr_debug("read LOST count failed\n"); |
| return; |
| } |
| |
| if (count.lost == 0) |
| return; |
| |
| lost->lost = count.lost; |
| if (evsel->core.ids) { |
| sid = xyarray__entry(evsel->core.sample_id, cpu_idx, thread_idx); |
| sample.id = sid->id; |
| } |
| |
| id_hdr_size = perf_event__synthesize_id_sample((void *)(lost + 1), |
| evsel->core.attr.sample_type, &sample); |
| lost->header.size = sizeof(*lost) + id_hdr_size; |
| record__write(rec, NULL, lost, lost->header.size); |
| } |
| |
| static void record__read_lost_samples(struct record *rec) |
| { |
| struct perf_session *session = rec->session; |
| struct perf_record_lost_samples *lost; |
| struct evsel *evsel; |
| |
| /* there was an error during record__open */ |
| if (session->evlist == NULL) |
| return; |
| |
| lost = zalloc(PERF_SAMPLE_MAX_SIZE); |
| if (lost == NULL) { |
| pr_debug("Memory allocation failed\n"); |
| return; |
| } |
| |
| lost->header.type = PERF_RECORD_LOST_SAMPLES; |
| |
| evlist__for_each_entry(session->evlist, evsel) { |
| struct xyarray *xy = evsel->core.sample_id; |
| |
| if (xy == NULL || evsel->core.fd == NULL) |
| continue; |
| if (xyarray__max_x(evsel->core.fd) != xyarray__max_x(xy) || |
| xyarray__max_y(evsel->core.fd) != xyarray__max_y(xy)) { |
| pr_debug("Unmatched FD vs. sample ID: skip reading LOST count\n"); |
| continue; |
| } |
| |
| for (int x = 0; x < xyarray__max_x(xy); x++) { |
| for (int y = 0; y < xyarray__max_y(xy); y++) { |
| __record__read_lost_samples(rec, evsel, lost, x, y); |
| } |
| } |
| } |
| free(lost); |
| |
| } |
| |
| static volatile int workload_exec_errno; |
| |
| /* |
| * evlist__prepare_workload will send a SIGUSR1 |
| * if the fork fails, since we asked by setting its |
| * want_signal to true. |
| */ |
| static void workload_exec_failed_signal(int signo __maybe_unused, |
| siginfo_t *info, |
| void *ucontext __maybe_unused) |
| { |
| workload_exec_errno = info->si_value.sival_int; |
| done = 1; |
| child_finished = 1; |
| } |
| |
| static void snapshot_sig_handler(int sig); |
| static void alarm_sig_handler(int sig); |
| |
| static const struct perf_event_mmap_page *evlist__pick_pc(struct evlist *evlist) |
| { |
| if (evlist) { |
| if (evlist->mmap && evlist->mmap[0].core.base) |
| return evlist->mmap[0].core.base; |
| if (evlist->overwrite_mmap && evlist->overwrite_mmap[0].core.base) |
| return evlist->overwrite_mmap[0].core.base; |
| } |
| return NULL; |
| } |
| |
| static const struct perf_event_mmap_page *record__pick_pc(struct record *rec) |
| { |
| const struct perf_event_mmap_page *pc = evlist__pick_pc(rec->evlist); |
| if (pc) |
| return pc; |
| return NULL; |
| } |
| |
| static int record__synthesize(struct record *rec, bool tail) |
| { |
| struct perf_session *session = rec->session; |
| struct machine *machine = &session->machines.host; |
| struct perf_data *data = &rec->data; |
| struct record_opts *opts = &rec->opts; |
| struct perf_tool *tool = &rec->tool; |
| int err = 0; |
| event_op f = process_synthesized_event; |
| |
| if (rec->opts.tail_synthesize != tail) |
| return 0; |
| |
| if (data->is_pipe) { |
| err = perf_event__synthesize_for_pipe(tool, session, data, |
| process_synthesized_event); |
| if (err < 0) |
| goto out; |
| |
| rec->bytes_written += err; |
| } |
| |
| err = perf_event__synth_time_conv(record__pick_pc(rec), tool, |
| process_synthesized_event, machine); |
| if (err) |
| goto out; |
| |
| /* Synthesize id_index before auxtrace_info */ |
| err = perf_event__synthesize_id_index(tool, |
| process_synthesized_event, |
| session->evlist, machine); |
| if (err) |
| goto out; |
| |
| if (rec->opts.full_auxtrace) { |
| err = perf_event__synthesize_auxtrace_info(rec->itr, tool, |
| session, process_synthesized_event); |
| if (err) |
| goto out; |
| } |
| |
| if (!evlist__exclude_kernel(rec->evlist)) { |
| err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
| machine); |
| WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n" |
| "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" |
| "Check /proc/kallsyms permission or run as root.\n"); |
| |
| err = perf_event__synthesize_modules(tool, process_synthesized_event, |
| machine); |
| WARN_ONCE(err < 0, "Couldn't record kernel module information.\n" |
| "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" |
| "Check /proc/modules permission or run as root.\n"); |
| } |
| |
| if (perf_guest) { |
| machines__process_guests(&session->machines, |
| perf_event__synthesize_guest_os, tool); |
| } |
| |
| err = perf_event__synthesize_extra_attr(&rec->tool, |
| rec->evlist, |
| process_synthesized_event, |
| data->is_pipe); |
| if (err) |
| goto out; |
| |
| err = perf_event__synthesize_thread_map2(&rec->tool, rec->evlist->core.threads, |
| process_synthesized_event, |
| NULL); |
| if (err < 0) { |
| pr_err("Couldn't synthesize thread map.\n"); |
| return err; |
| } |
| |
| err = perf_event__synthesize_cpu_map(&rec->tool, rec->evlist->core.all_cpus, |
| process_synthesized_event, NULL); |
| if (err < 0) { |
| pr_err("Couldn't synthesize cpu map.\n"); |
| return err; |
| } |
| |
| err = perf_event__synthesize_bpf_events(session, process_synthesized_event, |
| machine, opts); |
| if (err < 0) { |
| pr_warning("Couldn't synthesize bpf events.\n"); |
| err = 0; |
| } |
| |
| if (rec->opts.synth & PERF_SYNTH_CGROUP) { |
| err = perf_event__synthesize_cgroups(tool, process_synthesized_event, |
| machine); |
| if (err < 0) { |
| pr_warning("Couldn't synthesize cgroup events.\n"); |
| err = 0; |
| } |
| } |
| |
| if (rec->opts.nr_threads_synthesize > 1) { |
| mutex_init(&synth_lock); |
| perf_set_multithreaded(); |
| f = process_locked_synthesized_event; |
| } |
| |
| if (rec->opts.synth & PERF_SYNTH_TASK) { |
| bool needs_mmap = rec->opts.synth & PERF_SYNTH_MMAP; |
| |
| err = __machine__synthesize_threads(machine, tool, &opts->target, |
| rec->evlist->core.threads, |
| f, needs_mmap, opts->sample_address, |
| rec->opts.nr_threads_synthesize); |
| } |
| |
| if (rec->opts.nr_threads_synthesize > 1) { |
| perf_set_singlethreaded(); |
| mutex_destroy(&synth_lock); |
| } |
| |
| out: |
| return err; |
| } |
| |
| static int record__process_signal_event(union perf_event *event __maybe_unused, void *data) |
| { |
| struct record *rec = data; |
| pthread_kill(rec->thread_id, SIGUSR2); |
| return 0; |
| } |
| |
| static int record__setup_sb_evlist(struct record *rec) |
| { |
| struct record_opts *opts = &rec->opts; |
| |
| if (rec->sb_evlist != NULL) { |
| /* |
| * We get here if --switch-output-event populated the |
| * sb_evlist, so associate a callback that will send a SIGUSR2 |
| * to the main thread. |
| */ |
| evlist__set_cb(rec->sb_evlist, record__process_signal_event, rec); |
| rec->thread_id = pthread_self(); |
| } |
| #ifdef HAVE_LIBBPF_SUPPORT |
| if (!opts->no_bpf_event) { |
| if (rec->sb_evlist == NULL) { |
| rec->sb_evlist = evlist__new(); |
| |
| if (rec->sb_evlist == NULL) { |
| pr_err("Couldn't create side band evlist.\n."); |
| return -1; |
| } |
| } |
| |
| if (evlist__add_bpf_sb_event(rec->sb_evlist, &rec->session->header.env)) { |
| pr_err("Couldn't ask for PERF_RECORD_BPF_EVENT side band events.\n."); |
| return -1; |
| } |
| } |
| #endif |
| if (evlist__start_sb_thread(rec->sb_evlist, &rec->opts.target)) { |
| pr_debug("Couldn't start the BPF side band thread:\nBPF programs starting from now on won't be annotatable\n"); |
| opts->no_bpf_event = true; |
| } |
| |
| return 0; |
| } |
| |
| static int record__init_clock(struct record *rec) |
| { |
| struct perf_session *session = rec->session; |
| struct timespec ref_clockid; |
| struct timeval ref_tod; |
| u64 ref; |
| |
| if (!rec->opts.use_clockid) |
| return 0; |
| |
| if (rec->opts.use_clockid && rec->opts.clockid_res_ns) |
| session->header.env.clock.clockid_res_ns = rec->opts.clockid_res_ns; |
| |
| session->header.env.clock.clockid = rec->opts.clockid; |
| |
| if (gettimeofday(&ref_tod, NULL) != 0) { |
| pr_err("gettimeofday failed, cannot set reference time.\n"); |
| return -1; |
| } |
| |
| if (clock_gettime(rec->opts.clockid, &ref_clockid)) { |
| pr_err("clock_gettime failed, cannot set reference time.\n"); |
| return -1; |
| } |
| |
| ref = (u64) ref_tod.tv_sec * NSEC_PER_SEC + |
| (u64) ref_tod.tv_usec * NSEC_PER_USEC; |
| |
| session->header.env.clock.tod_ns = ref; |
| |
| ref = (u64) ref_clockid.tv_sec * NSEC_PER_SEC + |
| (u64) ref_clockid.tv_nsec; |
| |
| session->header.env.clock.clockid_ns = ref; |
| return 0; |
| } |
| |
| static void hit_auxtrace_snapshot_trigger(struct record *rec) |
| { |
| if (trigger_is_ready(&auxtrace_snapshot_trigger)) { |
| trigger_hit(&auxtrace_snapshot_trigger); |
| auxtrace_record__snapshot_started = 1; |
| if (auxtrace_record__snapshot_start(rec->itr)) |
| trigger_error(&auxtrace_snapshot_trigger); |
| } |
| } |
| |
| static void record__uniquify_name(struct record *rec) |
| { |
| struct evsel *pos; |
| struct evlist *evlist = rec->evlist; |
| char *new_name; |
| int ret; |
| |
| if (!perf_pmu__has_hybrid()) |
| return; |
| |
| evlist__for_each_entry(evlist, pos) { |
| if (!evsel__is_hybrid(pos)) |
| continue; |
| |
| if (strchr(pos->name, '/')) |
| continue; |
| |
| ret = asprintf(&new_name, "%s/%s/", |
| pos->pmu_name, pos->name); |
| if (ret) { |
| free(pos->name); |
| pos->name = new_name; |
| } |
| } |
| } |
| |
| static int record__terminate_thread(struct record_thread *thread_data) |
| { |
| int err; |
| enum thread_msg ack = THREAD_MSG__UNDEFINED; |
| pid_t tid = thread_data->tid; |
| |
| close(thread_data->pipes.msg[1]); |
| thread_data->pipes.msg[1] = -1; |
| err = read(thread_data->pipes.ack[0], &ack, sizeof(ack)); |
| if (err > 0) |
| pr_debug2("threads[%d]: sent %s\n", tid, thread_msg_tags[ack]); |
| else |
| pr_warning("threads[%d]: failed to receive termination notification from %d\n", |
| thread->tid, tid); |
| |
| return 0; |
| } |
| |
| static int record__start_threads(struct record *rec) |
| { |
| int t, tt, err, ret = 0, nr_threads = rec->nr_threads; |
| struct record_thread *thread_data = rec->thread_data; |
| sigset_t full, mask; |
| pthread_t handle; |
| pthread_attr_t attrs; |
| |
| thread = &thread_data[0]; |
| |
| if (!record__threads_enabled(rec)) |
| return 0; |
| |
| sigfillset(&full); |
| if (sigprocmask(SIG_SETMASK, &full, &mask)) { |
| pr_err("Failed to block signals on threads start: %s\n", strerror(errno)); |
| return -1; |
| } |
| |
| pthread_attr_init(&attrs); |
| pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED); |
| |
| for (t = 1; t < nr_threads; t++) { |
| enum thread_msg msg = THREAD_MSG__UNDEFINED; |
| |
| #ifdef HAVE_PTHREAD_ATTR_SETAFFINITY_NP |
| pthread_attr_setaffinity_np(&attrs, |
| MMAP_CPU_MASK_BYTES(&(thread_data[t].mask->affinity)), |
| (cpu_set_t *)(thread_data[t].mask->affinity.bits)); |
| #endif |
| if (pthread_create(&handle, &attrs, record__thread, &thread_data[t])) { |
| for (tt = 1; tt < t; tt++) |
| record__terminate_thread(&thread_data[t]); |
| pr_err("Failed to start threads: %s\n", strerror(errno)); |
| ret = -1; |
| goto out_err; |
| } |
| |
| err = read(thread_data[t].pipes.ack[0], &msg, sizeof(msg)); |
| if (err > 0) |
| pr_debug2("threads[%d]: sent %s\n", rec->thread_data[t].tid, |
| thread_msg_tags[msg]); |
| else |
| pr_warning("threads[%d]: failed to receive start notification from %d\n", |
| thread->tid, rec->thread_data[t].tid); |
| } |
| |
| sched_setaffinity(0, MMAP_CPU_MASK_BYTES(&thread->mask->affinity), |
| (cpu_set_t *)thread->mask->affinity.bits); |
| |
| pr_debug("threads[%d]: started on cpu%d\n", thread->tid, sched_getcpu()); |
| |
| out_err: |
| pthread_attr_destroy(&attrs); |
| |
| if (sigprocmask(SIG_SETMASK, &mask, NULL)) { |
| pr_err("Failed to unblock signals on threads start: %s\n", strerror(errno)); |
| ret = -1; |
| } |
| |
| return ret; |
| } |
| |
| static int record__stop_threads(struct record *rec) |
| { |
| int t; |
| struct record_thread *thread_data = rec->thread_data; |
| |
| for (t = 1; t < rec->nr_threads; t++) |
| record__terminate_thread(&thread_data[t]); |
| |
| for (t = 0; t < rec->nr_threads; t++) { |
| rec->samples += thread_data[t].samples; |
| if (!record__threads_enabled(rec)) |
| continue; |
| rec->session->bytes_transferred += thread_data[t].bytes_transferred; |
| rec->session->bytes_compressed += thread_data[t].bytes_compressed; |
| pr_debug("threads[%d]: samples=%lld, wakes=%ld, ", thread_data[t].tid, |
| thread_data[t].samples, thread_data[t].waking); |
| if (thread_data[t].bytes_transferred && thread_data[t].bytes_compressed) |
| pr_debug("transferred=%" PRIu64 ", compressed=%" PRIu64 "\n", |
| thread_data[t].bytes_transferred, thread_data[t].bytes_compressed); |
| else |
| pr_debug("written=%" PRIu64 "\n", thread_data[t].bytes_written); |
| } |
| |
| return 0; |
| } |
| |
| static unsigned long record__waking(struct record *rec) |
| { |
| int t; |
| unsigned long waking = 0; |
| struct record_thread *thread_data = rec->thread_data; |
| |
| for (t = 0; t < rec->nr_threads; t++) |
| waking += thread_data[t].waking; |
| |
| return waking; |
| } |
| |
| static int __cmd_record(struct record *rec, int argc, const char **argv) |
| { |
| int err; |
| int status = 0; |
| const bool forks = argc > 0; |
| struct perf_tool *tool = &rec->tool; |
| struct record_opts *opts = &rec->opts; |
| struct perf_data *data = &rec->data; |
| struct perf_session *session; |
| bool disabled = false, draining = false; |
| int fd; |
| float ratio = 0; |
| enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED; |
| |
| atexit(record__sig_exit); |
| signal(SIGCHLD, sig_handler); |
| signal(SIGINT, sig_handler); |
| signal(SIGTERM, sig_handler); |
| signal(SIGSEGV, sigsegv_handler); |
| |
| if (rec->opts.record_namespaces) |
| tool->namespace_events = true; |
| |
| if (rec->opts.record_cgroup) { |
| #ifdef HAVE_FILE_HANDLE |
| tool->cgroup_events = true; |
| #else |
| pr_err("cgroup tracking is not supported\n"); |
| return -1; |
| #endif |
| } |
| |
| if (rec->opts.auxtrace_snapshot_mode || rec->switch_output.enabled) { |
| signal(SIGUSR2, snapshot_sig_handler); |
| if (rec->opts.auxtrace_snapshot_mode) |
| trigger_on(&auxtrace_snapshot_trigger); |
| if (rec->switch_output.enabled) |
| trigger_on(&switch_output_trigger); |
| } else { |
| signal(SIGUSR2, SIG_IGN); |
| } |
| |
| session = perf_session__new(data, tool); |
| if (IS_ERR(session)) { |
| pr_err("Perf session creation failed.\n"); |
| return PTR_ERR(session); |
| } |
| |
| if (record__threads_enabled(rec)) { |
| if (perf_data__is_pipe(&rec->data)) { |
| pr_err("Parallel trace streaming is not available in pipe mode.\n"); |
| return -1; |
| } |
| if (rec->opts.full_auxtrace) { |
| pr_err("Parallel trace streaming is not available in AUX area tracing mode.\n"); |
| return -1; |
| } |
| } |
| |
| fd = perf_data__fd(data); |
| rec->session = session; |
| |
| if (zstd_init(&session->zstd_data, rec->opts.comp_level) < 0) { |
| pr_err("Compression initialization failed.\n"); |
| return -1; |
| } |
| #ifdef HAVE_EVENTFD_SUPPORT |
| done_fd = eventfd(0, EFD_NONBLOCK); |
| if (done_fd < 0) { |
| pr_err("Failed to create wakeup eventfd, error: %m\n"); |
| status = -1; |
| goto out_delete_session; |
| } |
| err = evlist__add_wakeup_eventfd(rec->evlist, done_fd); |
| if (err < 0) { |
| pr_err("Failed to add wakeup eventfd to poll list\n"); |
| status = err; |
| goto out_delete_session; |
| } |
| #endif // HAVE_EVENTFD_SUPPORT |
| |
| session->header.env.comp_type = PERF_COMP_ZSTD; |
| session->header.env.comp_level = rec->opts.comp_level; |
| |
| if (rec->opts.kcore && |
| !record__kcore_readable(&session->machines.host)) { |
| pr_err("ERROR: kcore is not readable.\n"); |
| return -1; |
| } |
| |
| if (record__init_clock(rec)) |
| return -1; |
| |
| record__init_features(rec); |
| |
| if (forks) { |
| err = evlist__prepare_workload(rec->evlist, &opts->target, argv, data->is_pipe, |
| workload_exec_failed_signal); |
| if (err < 0) { |
| pr_err("Couldn't run the workload!\n"); |
| status = err; |
| goto out_delete_session; |
| } |
| } |
| |
| /* |
| * If we have just single event and are sending data |
| * through pipe, we need to force the ids allocation, |
| * because we synthesize event name through the pipe |
| * and need the id for that. |
| */ |
| if (data->is_pipe && rec->evlist->core.nr_entries == 1) |
| rec->opts.sample_id = true; |
| |
| record__uniquify_name(rec); |
| |
| /* Debug message used by test scripts */ |
| pr_debug3("perf record opening and mmapping events\n"); |
| if (record__open(rec) != 0) { |
| err = -1; |
| goto out_free_threads; |
| } |
| /* Debug message used by test scripts */ |
| pr_debug3("perf record done opening and mmapping events\n"); |
| session->header.env.comp_mmap_len = session->evlist->core.mmap_len; |
| |
| if (rec->opts.kcore) { |
| err = record__kcore_copy(&session->machines.host, data); |
| if (err) { |
| pr_err("ERROR: Failed to copy kcore\n"); |
| goto out_free_threads; |
| } |
| } |
| |
| err = bpf__apply_obj_config(); |
| if (err) { |
| char errbuf[BUFSIZ]; |
| |
| bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); |
| pr_err("ERROR: Apply config to BPF failed: %s\n", |
| errbuf); |
| goto out_free_threads; |
| } |
| |
| /* |
| * Normally perf_session__new would do this, but it doesn't have the |
| * evlist. |
| */ |
| if (rec->tool.ordered_events && !evlist__sample_id_all(rec->evlist)) { |
| pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n"); |
| rec->tool.ordered_events = false; |
| } |
| |
| if (!rec->evlist->core.nr_groups) |
| perf_header__clear_feat(&session->header, HEADER_GROUP_DESC); |
| |
| if (data->is_pipe) { |
| err = perf_header__write_pipe(fd); |
| if (err < 0) |
| goto out_free_threads; |
| } else { |
| err = perf_session__write_header(session, rec->evlist, fd, false); |
| if (err < 0) |
| goto out_free_threads; |
| } |
| |
| err = -1; |
| if (!rec->no_buildid |
| && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) { |
| pr_err("Couldn't generate buildids. " |
| "Use --no-buildid to profile anyway.\n"); |
| goto out_free_threads; |
| } |
| |
| err = record__setup_sb_evlist(rec); |
| if (err) |
| goto out_free_threads; |
| |
| err = record__synthesize(rec, false); |
| if (err < 0) |
| goto out_free_threads; |
| |
| if (rec->realtime_prio) { |
| struct sched_param param; |
| |
| param.sched_priority = rec->realtime_prio; |
| if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { |
| pr_err("Could not set realtime priority.\n"); |
| err = -1; |
| goto out_free_threads; |
| } |
| } |
| |
| if (record__start_threads(rec)) |
| goto out_free_threads; |
| |
| /* |
| * When perf is starting the traced process, all the events |
| * (apart from group members) have enable_on_exec=1 set, |
| * so don't spoil it by prematurely enabling them. |
| */ |
| if (!target__none(&opts->target) && !opts->initial_delay) |
| evlist__enable(rec->evlist); |
| |
| /* |
| * Let the child rip |
| */ |
| if (forks) { |
| struct machine *machine = &session->machines.host; |
| union perf_event *event; |
| pid_t tgid; |
| |
| event = malloc(sizeof(event->comm) + machine->id_hdr_size); |
| if (event == NULL) { |
| err = -ENOMEM; |
| goto out_child; |
| } |
| |
| /* |
| * Some H/W events are generated before COMM event |
| * which is emitted during exec(), so perf script |
| * cannot see a correct process name for those events. |
| * Synthesize COMM event to prevent it. |
| */ |
| tgid = perf_event__synthesize_comm(tool, event, |
| rec->evlist->workload.pid, |
| process_synthesized_event, |
| machine); |
| free(event); |
| |
| if (tgid == -1) |
| goto out_child; |
| |
| event = malloc(sizeof(event->namespaces) + |
| (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + |
| machine->id_hdr_size); |
| if (event == NULL) { |
| err = -ENOMEM; |
| goto out_child; |
| } |
| |
| /* |
| * Synthesize NAMESPACES event for the command specified. |
| */ |
| perf_event__synthesize_namespaces(tool, event, |
| rec->evlist->workload.pid, |
| tgid, process_synthesized_event, |
| machine); |
| free(event); |
| |
| evlist__start_workload(rec->evlist); |
| } |
| |
| if (opts->initial_delay) { |
| pr_info(EVLIST_DISABLED_MSG); |
| if (opts->initial_delay > 0) { |
| usleep(opts->initial_delay * USEC_PER_MSEC); |
| evlist__enable(rec->evlist); |
| pr_info(EVLIST_ENABLED_MSG); |
| } |
| } |
| |
| err = event_enable_timer__start(rec->evlist->eet); |
| if (err) |
| goto out_child; |
| |
| /* Debug message used by test scripts */ |
| pr_debug3("perf record has started\n"); |
| fflush(stderr); |
| |
| trigger_ready(&auxtrace_snapshot_trigger); |
| trigger_ready(&switch_output_trigger); |
| perf_hooks__invoke_record_start(); |
| |
| /* |
| * Must write FINISHED_INIT so it will be seen after all other |
| * synthesized user events, but before any regular events. |
| */ |
| err = write_finished_init(rec, false); |
| if (err < 0) |
| goto out_child; |
| |
| for (;;) { |
| unsigned long long hits = thread->samples; |
| |
| /* |
| * rec->evlist->bkw_mmap_state is possible to be |
| * BKW_MMAP_EMPTY here: when done == true and |
| * hits != rec->samples in previous round. |
| * |
| * evlist__toggle_bkw_mmap ensure we never |
| * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING. |
| */ |
| if (trigger_is_hit(&switch_output_trigger) || done || draining) |
| evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING); |
| |
| if (record__mmap_read_all(rec, false) < 0) { |
| trigger_error(&auxtrace_snapshot_trigger); |
| trigger_error(&switch_output_trigger); |
| err = -1; |
| goto out_child; |
| } |
| |
| if (auxtrace_record__snapshot_started) { |
| auxtrace_record__snapshot_started = 0; |
| if (!trigger_is_error(&auxtrace_snapshot_trigger)) |
| record__read_auxtrace_snapshot(rec, false); |
| if (trigger_is_error(&auxtrace_snapshot_trigger)) { |
| pr_err("AUX area tracing snapshot failed\n"); |
| err = -1; |
| goto out_child; |
| } |
| } |
| |
| if (trigger_is_hit(&switch_output_trigger)) { |
| /* |
| * If switch_output_trigger is hit, the data in |
| * overwritable ring buffer should have been collected, |
| * so bkw_mmap_state should be set to BKW_MMAP_EMPTY. |
| * |
| * If SIGUSR2 raise after or during record__mmap_read_all(), |
| * record__mmap_read_all() didn't collect data from |
| * overwritable ring buffer. Read again. |
| */ |
| if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING) |
| continue; |
| trigger_ready(&switch_output_trigger); |
| |
| /* |
| * Reenable events in overwrite ring buffer after |
| * record__mmap_read_all(): we should have collected |
| * data from it. |
| */ |
| evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING); |
| |
| if (!quiet) |
| fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n", |
| record__waking(rec)); |
| thread->waking = 0; |
| fd = record__switch_output(rec, false); |
| if (fd < 0) { |
| pr_err("Failed to switch to new file\n"); |
| trigger_error(&switch_output_trigger); |
| err = fd; |
| goto out_child; |
| } |
| |
| /* re-arm the alarm */ |
| if (rec->switch_output.time) |
| alarm(rec->switch_output.time); |
| } |
| |
| if (hits == thread->samples) { |
| if (done || draining) |
| break; |
| err = fdarray__poll(&thread->pollfd, -1); |
| /* |
| * Propagate error, only if there's any. Ignore positive |
| * number of returned events and interrupt error. |
| */ |
| if (err > 0 || (err < 0 && errno == EINTR)) |
| err = 0; |
| thread->waking++; |
| |
| if (fdarray__filter(&thread->pollfd, POLLERR | POLLHUP, |
| record__thread_munmap_filtered, NULL) == 0) |
| draining = true; |
| |
| err = record__update_evlist_pollfd_from_thread(rec, rec->evlist, thread); |
| if (err) |
| goto out_child; |
| } |
| |
| if (evlist__ctlfd_process(rec->evlist, &cmd) > 0) { |
| switch (cmd) { |
| case EVLIST_CTL_CMD_SNAPSHOT: |
| hit_auxtrace_snapshot_trigger(rec); |
| evlist__ctlfd_ack(rec->evlist); |
| break; |
| case EVLIST_CTL_CMD_STOP: |
| done = 1; |
| break; |
| case EVLIST_CTL_CMD_ACK: |
| case EVLIST_CTL_CMD_UNSUPPORTED: |
| case EVLIST_CTL_CMD_ENABLE: |
| case EVLIST_CTL_CMD_DISABLE: |
| case EVLIST_CTL_CMD_EVLIST: |
| case EVLIST_CTL_CMD_PING: |
| default: |
| break; |
| } |
| } |
| |
| err = event_enable_timer__process(rec->evlist->eet); |
| if (err < 0) |
| goto out_child; |
| if (err) { |
| err = 0; |
| done = 1; |
| } |
| |
| /* |
| * When perf is starting the traced process, at the end events |
| * die with the process and we wait for that. Thus no need to |
| * disable events in this case. |
| */ |
| if (done && !disabled && !target__none(&opts->target)) { |
| trigger_off(&auxtrace_snapshot_trigger); |
| evlist__disable(rec->evlist); |
| disabled = true; |
| } |
| } |
| |
| trigger_off(&auxtrace_snapshot_trigger); |
| trigger_off(&switch_output_trigger); |
| |
| if (opts->auxtrace_snapshot_on_exit) |
| record__auxtrace_snapshot_exit(rec); |
| |
| if (forks && workload_exec_errno) { |
| char msg[STRERR_BUFSIZE], strevsels[2048]; |
| const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); |
| |
| evlist__scnprintf_evsels(rec->evlist, sizeof(strevsels), strevsels); |
| |
| pr_err("Failed to collect '%s' for the '%s' workload: %s\n", |
| strevsels, argv[0], emsg); |
| err = -1; |
| goto out_child; |
| } |
| |
| if (!quiet) |
| fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", |
| record__waking(rec)); |
| |
| write_finished_init(rec, true); |
| |
| if (target__none(&rec->opts.target)) |
| record__synthesize_workload(rec, true); |
| |
| out_child: |
| record__stop_threads(rec); |
| record__mmap_read_all(rec, true); |
| out_free_threads: |
| record__free_thread_data(rec); |
| evlist__finalize_ctlfd(rec->evlist); |
| record__aio_mmap_read_sync(rec); |
| |
| if (rec->session->bytes_transferred && rec->session->bytes_compressed) { |
| ratio = (float)rec->session->bytes_transferred/(float)rec->session->bytes_compressed; |
| session->header.env.comp_ratio = ratio + 0.5; |
| } |
| |
| if (forks) { |
| int exit_status; |
| |
| if (!child_finished) |
| kill(rec->evlist->workload.pid, SIGTERM); |
| |
| wait(&exit_status); |
| |
| if (err < 0) |
| status = err; |
| else if (WIFEXITED(exit_status)) |
| status = WEXITSTATUS(exit_status); |
| else if (WIFSIGNALED(exit_status)) |
| signr = WTERMSIG(exit_status); |
| } else |
| status = err; |
| |
| if (rec->off_cpu) |
| rec->bytes_written += off_cpu_write(rec->session); |
| |
| record__read_lost_samples(rec); |
| record__synthesize(rec, true); |
| /* this will be recalculated during process_buildids() */ |
| rec->samples = 0; |
| |
| if (!err) { |
| if (!rec->timestamp_filename) { |
| record__finish_output(rec); |
| } else { |
| fd = record__switch_output(rec, true); |
| if (fd < 0) { |
| status = fd; |
| goto out_delete_session; |
| } |
| } |
| } |
| |
| perf_hooks__invoke_record_end(); |
| |
| if (!err && !quiet) { |
| char samples[128]; |
| const char *postfix = rec->timestamp_filename ? |
| ".<timestamp>" : ""; |
| |
| if (rec->samples && !rec->opts.full_auxtrace) |
| scnprintf(samples, sizeof(samples), |
| " (%" PRIu64 " samples)", rec->samples); |
| else |
| samples[0] = '\0'; |
| |
| fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s", |
| perf_data__size(data) / 1024.0 / 1024.0, |
| data->path, postfix, samples); |
| if (ratio) { |
| fprintf(stderr, ", compressed (original %.3f MB, ratio is %.3f)", |
| rec->session->bytes_transferred / 1024.0 / 1024.0, |
| ratio); |
| } |
| fprintf(stderr, " ]\n"); |
| } |
| |
| out_delete_session: |
| #ifdef HAVE_EVENTFD_SUPPORT |
| if (done_fd >= 0) { |
| fd = done_fd; |
| done_fd = -1; |
| |
| close(fd); |
| } |
| #endif |
| zstd_fini(&session->zstd_data); |
| perf_session__delete(session); |
| |
| if (!opts->no_bpf_event) |
| evlist__stop_sb_thread(rec->sb_evlist); |
| return status; |
| } |
| |
| static void callchain_debug(struct callchain_param *callchain) |
| { |
| static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" }; |
| |
| pr_debug("callchain: type %s\n", str[callchain->record_mode]); |
| |
| if (callchain->record_mode == CALLCHAIN_DWARF) |
| pr_debug("callchain: stack dump size %d\n", |
| callchain->dump_size); |
| } |
| |
| int record_opts__parse_callchain(struct record_opts *record, |
| struct callchain_param *callchain, |
| const char *arg, bool unset) |
| { |
| int ret; |
| callchain->enabled = !unset; |
| |
| /* --no-call-graph */ |
| if (unset) { |
| callchain->record_mode = CALLCHAIN_NONE; |
| pr_debug("callchain: disabled\n"); |
| return 0; |
| } |
| |
| ret = parse_callchain_record_opt(arg, callchain); |
| if (!ret) { |
| /* Enable data address sampling for DWARF unwind. */ |
| if (callchain->record_mode == CALLCHAIN_DWARF) |
| record->sample_address = true; |
| callchain_debug(callchain); |
| } |
| |
| return ret; |
| } |
| |
| int record_parse_callchain_opt(const struct option *opt, |
| const char *arg, |
| int unset) |
| { |
| return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset); |
| } |
| |
| int record_callchain_opt(const struct option *opt, |
| const char *arg __maybe_unused, |
| int unset __maybe_unused) |
| { |
| struct callchain_param *callchain = opt->value; |
| |
| callchain->enabled = true; |
| |
| if (callchain->record_mode == CALLCHAIN_NONE) |
| callchain->record_mode = CALLCHAIN_FP; |
| |
| callchain_debug(callchain); |
| return 0; |
| } |
| |
| static int perf_record_config(const char *var, const char *value, void *cb) |
| { |
| struct record *rec = cb; |
| |
| if (!strcmp(var, "record.build-id")) { |
| if (!strcmp(value, "cache")) |
| rec->no_buildid_cache = false; |
| else if (!strcmp(value, "no-cache")) |
| rec->no_buildid_cache = true; |
| else if (!strcmp(value, "skip")) |
| rec->no_buildid = true; |
| else if (!strcmp(value, "mmap")) |
| rec->buildid_mmap = true; |
| else |
| return -1; |
| return 0; |
| } |
| if (!strcmp(var, "record.call-graph")) { |
| var = "call-graph.record-mode"; |
| return perf_default_config(var, value, cb); |
| } |
| #ifdef HAVE_AIO_SUPPORT |
| if (!strcmp(var, "record.aio")) { |
| rec->opts.nr_cblocks = strtol(value, NULL, 0); |
| if (!rec->opts.nr_cblocks) |
| rec->opts.nr_cblocks = nr_cblocks_default; |
| } |
| #endif |
| if (!strcmp(var, "record.debuginfod")) { |
| rec->debuginfod.urls = strdup(value); |
| if (!rec->debuginfod.urls) |
| return -ENOMEM; |
| rec->debuginfod.set = true; |
| } |
| |
| return 0; |
| } |
| |
| static int record__parse_event_enable_time(const struct option *opt, const char *str, int unset) |
| { |
| struct record *rec = (struct record *)opt->value; |
| |
| return evlist__parse_event_enable_time(rec->evlist, &rec->opts, str, unset); |
| } |
| |
| static int record__parse_affinity(const struct option *opt, const char *str, int unset) |
| { |
| struct record_opts *opts = (struct record_opts *)opt->value; |
| |
| if (unset || !str) |
| return 0; |
| |
| if (!strcasecmp(str, "node")) |
| opts->affinity = PERF_AFFINITY_NODE; |
| else if (!strcasecmp(str, "cpu")) |
| opts->affinity = PERF_AFFINITY_CPU; |
| |
| return 0; |
| } |
| |
| static int record__mmap_cpu_mask_alloc(struct mmap_cpu_mask *mask, int nr_bits) |
| { |
| mask->nbits = nr_bits; |
| mask->bits = bitmap_zalloc(mask->nbits); |
| if (!mask->bits) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static void record__mmap_cpu_mask_free(struct mmap_cpu_mask *mask) |
| { |
| bitmap_free(mask->bits); |
| mask->nbits = 0; |
| } |
| |
| static int record__thread_mask_alloc(struct thread_mask *mask, int nr_bits) |
| { |
| int ret; |
| |
| ret = record__mmap_cpu_mask_alloc(&mask->maps, nr_bits); |
| if (ret) { |
| mask->affinity.bits = NULL; |
| return ret; |
| } |
| |
| ret = record__mmap_cpu_mask_alloc(&mask->affinity, nr_bits); |
| if (ret) { |
| record__mmap_cpu_mask_free(&mask->maps); |
| mask-> |