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1 """ | 1 """ |
2 perf is a tool included in the linux kernel tree that | 2 perf is a tool included in the linux kernel tree that |
3 supports functionality similar to oprofile and more. | 3 supports functionality similar to oprofile and more. |
4 | 4 |
5 @see: http://lwn.net/Articles/310260/ | 5 @see: http://lwn.net/Articles/310260/ |
6 """ | 6 """ |
7 | 7 |
8 import time, os, stat, subprocess, signal | 8 import time, os, subprocess, signal |
9 import logging | |
10 from autotest_lib.client.bin import profiler, os_dep, utils | 9 from autotest_lib.client.bin import profiler, os_dep, utils |
11 | 10 |
12 | 11 |
13 class perf(profiler.profiler): | 12 class perf(profiler.profiler): |
14 version = 1 | 13 version = 1 |
15 | 14 |
16 def initialize(self, events="cycles,instructions"): | 15 def initialize(self, events="cycles,instructions"): |
17 self.events = events | 16 self.events = events |
18 self.perf_bin = os_dep.command('perf') | 17 self.perf_bin = os_dep.command('perf') |
19 perf_help = utils.run('%s report help' % self.perf_bin, | 18 perf_help = utils.run('%s report help' % self.perf_bin, |
(...skipping 25 matching lines...) Expand all Loading... |
45 def report(self, test): | 44 def report(self, test): |
46 for key in self.sort_keys: | 45 for key in self.sort_keys: |
47 reportfile = os.path.join(test.profdir, '%s.comm' % key) | 46 reportfile = os.path.join(test.profdir, '%s.comm' % key) |
48 cmd = ("%s report -i %s --sort %s,dso" % (self.perf_bin, | 47 cmd = ("%s report -i %s --sort %s,dso" % (self.perf_bin, |
49 self.logfile, | 48 self.logfile, |
50 key)) | 49 key)) |
51 outfile = open(reportfile, 'w') | 50 outfile = open(reportfile, 'w') |
52 p = subprocess.Popen(cmd, shell=True, stdout=outfile, | 51 p = subprocess.Popen(cmd, shell=True, stdout=outfile, |
53 stderr=subprocess.STDOUT) | 52 stderr=subprocess.STDOUT) |
54 p.wait() | 53 p.wait() |
55 # The raw detailed perf output is HUGE. We cannot store it by default. | |
56 perf_log_size = os.stat(self.logfile)[stat.ST_SIZE] | |
57 logging.info('Removing %s after generating reports (saving %s bytes).', | |
58 self.logfile, perf_log_size) | |
59 os.unlink(self.logfile) | |
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