[FreeBSD] Cannot allocate memory

[avkarenow]

Summary

• OS: FreeBSD 12.2/13.0
• Architecture: amd64
• Psutil version: 5.8.0
• Python version: 3.8.12
• Type: core

Description

Hello,

From time to time while I'm running code like for proc in psutil.process_iter(): ... I got: Cannot allocate memory (originated from sysctl)
It happens on many FreeBSD 12.2 and 13.0 installations with 128-196 GB of RAM. Code is running as root with ulimit:

cpu time               (seconds, -t)  unlimited
file size           (512-blocks, -f)  unlimited
data seg size           (kbytes, -d)  33554432
stack size              (kbytes, -s)  524288
core file size      (512-blocks, -c)  unlimited
max memory size         (kbytes, -m)  unlimited
locked memory           (kbytes, -l)  unlimited
max user processes              (-u)  34318
open files                      (-n)  942921
virtual mem size        (kbytes, -v)  unlimited
swap limit              (kbytes, -w)  unlimited
socket buffer size       (bytes, -b)  unlimited
pseudo-terminals                (-p)  unlimited
kqueues                         (-k)  unlimited
umtx shared locks               (-o)  unlimited

Traceback:
    for proc in psutil.process_iter():
  File "/usr/local/lib/python3.8/site-packages/psutil/__init__.py", line 1425, in process_iter
    a = set(pids())
  File "/usr/local/lib/python3.8/site-packages/psutil/__init__.py", line 1365, in pids
    ret = sorted(_psplatform.pids())
  File "/usr/local/lib/python3.8/site-packages/psutil/_psbsd.py", line 513, in pids
    ret = cext.pids()
OSError: [Errno 12] Cannot allocate memory (originated from sysctl)

[peterjeremy]

This looks to be the same as #2093

[avkarenow]

I was testing last commit version (04e7aa6) but the problem with cannot allocate memory still appears.

[avkarenow]

The issue seems to be fixed by c7c7bbc and works now without problems.