3555b48ff4
When starting 'memory_peak' service is using python command instead of python3, while psutil (required package) is most probably being installed into the python3 environment (as we are dropping python2.7 support). Closes-Bug: #1860753 Change-Id: Ia2b7e2e33d784560443131e2965f520b361a54e3
52 lines
1.5 KiB
Python
52 lines
1.5 KiB
Python
# This tool lists processes that lock memory pages from swapping to disk.
|
|
|
|
import re
|
|
|
|
import psutil
|
|
|
|
|
|
LCK_SUMMARY_REGEX = re.compile(
|
|
"^VmLck:\s+(?P<locked>[\d]+)\s+kB", re.MULTILINE)
|
|
|
|
|
|
def main():
|
|
try:
|
|
print(_get_report())
|
|
except Exception as e:
|
|
print("Failure listing processes locking memory: %s" % str(e))
|
|
raise
|
|
|
|
|
|
def _get_report():
|
|
mlock_users = []
|
|
for proc in psutil.process_iter():
|
|
# sadly psutil does not expose locked pages info, that's why we
|
|
# iterate over the /proc/%pid/status files manually
|
|
try:
|
|
s = open("%s/%d/status" % (psutil.PROCFS_PATH, proc.pid), 'r')
|
|
except EnvironmentError:
|
|
continue
|
|
with s:
|
|
for line in s:
|
|
result = LCK_SUMMARY_REGEX.search(line)
|
|
if result:
|
|
locked = int(result.group('locked'))
|
|
if locked:
|
|
mlock_users.append({'name': proc.name(),
|
|
'pid': proc.pid,
|
|
'locked': locked})
|
|
|
|
# produce a single line log message with per process mlock stats
|
|
if mlock_users:
|
|
return "; ".join(
|
|
"[%(name)s (pid:%(pid)s)]=%(locked)dKB" % args
|
|
# log heavy users first
|
|
for args in sorted(mlock_users, key=lambda d: d['locked'])
|
|
)
|
|
else:
|
|
return "no locked memory"
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|