| """ |
| Uses perf_events to count cycles and instructions |
| |
| Defaults options: |
| job.profilers.add('cpistat', interval=1) |
| """ |
| import time, os, subprocess |
| from autotest_lib.client.bin import profiler |
| |
| class cpistat(profiler.profiler): |
| version = 1 |
| |
| def initialize(self, interval = 1): |
| self.interval = interval |
| |
| |
| def start(self, test): |
| cmd = os.path.join(self.bindir, 'site_cpistat') |
| if not os.path.exists(cmd): |
| cmd = os.path.join(self.bindir, 'cpistat') |
| logfile = open(os.path.join(test.profdir, "cpistat"), 'w') |
| p = subprocess.Popen(cmd, stdout=logfile, |
| stderr=subprocess.STDOUT) |
| self.pid = p.pid |
| |
| |
| def stop(self, test): |
| os.kill(self.pid, 15) |
