sascha/devlib
1
0
Fork 0
mirror of https://github.com/ARM-software/devlib.git synced 2025-01-31 02:00:45 +00:00
Code Issues Releases Wiki Activity

collector/perf: Only kill sleep if running perf stat

Browse Source 
The stop() command of the PerfCollector kills all sleep commands in
the target, saying "We hope that no other important sleep is
on-going".  This is only needed if we are running "perf stat",
simpleperf does not need this.  Background the
perf/simpleperf command and only kill all sleeps in that specific case.
This commit is contained in:
Robert Freeman 2021-03-29 15:38:38 +01:00 committed by Marc Bonnici
parent 5d342044a2
commit 4859e818fb
1 changed files with 9 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
devlib/collector/perf.py
View File

@ -24,7 +24,7 @@ from devlib.collector import (CollectorBase, CollectorOutput,
from devlib.utils.misc import ensure_file_directory_exists as _f
PERF_COMMAND_TEMPLATE = '{binary} {command} {options} {events} sleep 1000 > {outfile} 2>&1 '
PERF_STAT_COMMAND_TEMPLATE = '{binary} {command} {options} {events} {sleep_cmd} > {outfile} 2>&1 '
PERF_REPORT_COMMAND_TEMPLATE= '{binary} report {options} -i {datafile} > {outfile} 2>&1 '
PERF_RECORD_COMMAND_TEMPLATE= '{binary} record {options} {events} -o {outfile}'
@ -141,11 +141,12 @@ class PerfCollector(CollectorBase):
def start(self):
for command in self.commands:
self.target.kick_off(command, as_root=self.target.is_rooted)
self.target.background(command, as_root=self.target.is_rooted)
def stop(self):
self.target.killall(self.perf_type, signal='SIGINT',
as_root=self.target.is_rooted)
if self.perf_type == "perf" and self.command == "stat":
# perf doesn't transmit the signal to its sleep call so handled here:
self.target.killall('sleep', as_root=self.target.is_rooted)
# NB: we hope that no other "important" sleep is on-going
@ -188,10 +189,12 @@ class PerfCollector(CollectorBase):
def _build_perf_stat_command(self, options, events, label):
event_string = ' '.join(['-e {}'.format(e) for e in events])
command = PERF_COMMAND_TEMPLATE.format(binary = self.binary,
sleep_cmd = 'sleep 1000' if self.perf_type == 'perf' else ''
command = PERF_STAT_COMMAND_TEMPLATE.format(binary = self.binary,
command = self.command,
options = options or '',
events = event_string,
sleep_cmd = sleep_cmd,
outfile = self._get_target_file(label, 'out'))
return command