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[bug] get_cpus is not supporting cgroup2 #11635 #11667

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merged 2 commits into from Jul 22, 2022
Merged

[bug] get_cpus is not supporting cgroup2 #11635 #11667

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1fb20cf
[bug] get_cpus is not supporting cgroup2 #11635
Jul 18, 2022
9e43328
Fix cgroup2 "max" case #11635
Jul 21, 2022
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15 changes: 13 additions & 2 deletions conan/tools/build/cpu.py
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@@ -1,5 +1,6 @@
import math
import multiprocessing
import os

from conans.util.files import load

Expand All @@ -15,8 +16,18 @@ def _cpu_count():
try:
try:
# This is necessary to deduce docker cpu_count
cfs_quota_us = int(load("/sys/fs/cgroup/cpu/cpu.cfs_quota_us"))
cfs_period_us = int(load("/sys/fs/cgroup/cpu/cpu.cfs_period_us"))
cfs_quota_us = cfs_period_us = 0
# cgroup2
if os.path.exists("/sys/fs/cgroup/cgroup.controllers"):
cpu_max = load("/sys/fs/cgroup/cpu.max").split()
if cpu_max[0] != "max":
if len(cpu_max) == 1:
cfs_quota_us, cfs_period_us = int(cpu_max[0]), 100_000
else:
cfs_quota_us, cfs_period_us = map(int, cpu_max)
else: # cgroup1
cfs_quota_us = int(load("/sys/fs/cgroup/cpu/cpu.cfs_quota_us"))
cfs_period_us = int(load("/sys/fs/cgroup/cpu/cpu.cfs_period_us"))
if cfs_quota_us > 0 and cfs_period_us > 0:
return int(math.ceil(cfs_quota_us / cfs_period_us))
except (EnvironmentError, TypeError):
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