| import os |
| import re |
| from autotest_lib.client.bin import test |
| from autotest_lib.client.bin import utils |
| |
| import tracers |
| import base_tracer |
| |
| class tracing_microbenchmark(test.test): |
| version = 1 |
| preserve_srcdir = True |
| |
| def setup(self): |
| os.chdir(self.srcdir) |
| utils.system('make CROSS_COMPILE=""') |
| |
| def initialize(self, tracer='ftrace', calls=100000, **kwargs): |
| self.job.require_gcc() |
| tracer_class = getattr(tracers, tracer) |
| if not issubclass(tracer_class, base_tracer.Tracer): |
| raise TypeError |
| self.tracer = tracer_class() |
| |
| getuid_microbench = os.path.join(self.srcdir, 'getuid_microbench') |
| self.cmd = '%s %d' % (getuid_microbench, calls) |
| |
| def warmup(self, buffer_size_kb=8000, **kwargs): |
| self.tracer.warmup(buffer_size_kb) |
| |
| def cleanup(self): |
| self.tracer.cleanup() |
| |
| def run_once(self, **kwargs): |
| self.results = {} |
| |
| self.tracer.start_tracing() |
| self.cmd_result = utils.run(self.cmd) |
| self.tracer.stop_tracing() |
| |
| self.tracer.gather_stats(self.results) |
| self.tracer.reset_tracing() |
| |
| def postprocess_iteration(self): |
| result_re = re.compile(r'(?P<calls>\d+) calls ' |
| r'in (?P<time>\d+\.\d+) s ' |
| '\((?P<ns_per_call>\d+\.\d+) ns/call\)') |
| match = result_re.match(self.cmd_result.stdout) |
| self.results.update(match.groupdict()) |
| |
| self.write_perf_keyval(self.results) |
