On Thu, Jul 17, 2025 at 07:05:14AM -1000, Tejun Heo <tj@xxxxxxxxxx> wrote:
> I wonder what hierarchical summing would look like for this.
So do I.
Thus I meant to expose this only in a *.local file not the hierarchical
one.
But I realize it should [1] match cpu.stat[.local]:thottled_usec
since they're similar quantities in principle.
- cpu.stat:thottled_usec
- sums the time the cgroup's quota was in effect
- not hierarchical (:-/)
- cpu.stat.local:thottled_usec
- not hierarchical
- sums the time cgroup's or ancestor's quota was in effect
-> IIUC this is what's the motivation of the original patch
HTH,
Michal
[1] I'd find it more logical if
cpu.stat:thottled_usec were cpu.stat.local:thottling_usec and
cpu.stat.local:thottled_usec were cpu.stat.local:throttled_usec.
Only to illustrate my understanding of hierarchy in cpu.stat, it doesn't
matter since it's what it is now.
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