cpuset: add NumCPU to read the host's online CPU count from sysfs#354
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NumCPU reads /sys/devices/system/cpu/online and returns the number of online CPUs. Unlike runtime.NumCPU it is not affected by the calling process's CPU affinity (its cgroup cpuset), so it reflects the whole machine, which is what callers want when sizing a host-wide resource by CPU count. Signed-off-by: Davanum Srinivas <davanum@gmail.com>
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Thx! /lgtm |
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NumCPU reads /sys/devices/system/cpu/online and returns the number of online CPUs. Unlike runtime.NumCPU it is not affected by the calling process's CPU affinity (its cgroup cpuset), so it reflects the whole machine, which is what callers want when sizing a host-wide resource by CPU count.
What type of PR is this?
/kind feature
What this PR does / why we need it:
Which issue(s) this PR fixes:
Fixes #
Special notes for your reviewer:
Based on reviewer request from kubernetes/kubernetes#140021
Release note: