On 2019/7/20 上午12:39, Michal Koutný wrote: > On Tue, Jul 16, 2019 at 11:40:35AM +0800, 王贇 <yun.wang@xxxxxxxxxxxxxxxxx> wrote: >> By doing 'cat /sys/fs/cgroup/cpu/CGROUP_PATH/cpu.numa_stat', we see new >> output line heading with 'exectime', like: >> >> exectime 311900 407166 > What you present are times aggregated over CPUs in the NUMA nodes, this > seems a bit lossy interface. > > Despite you the aggregated information is sufficient for your > monitoring, I think it's worth providing the information with the > original granularity. As Peter suggested previously, kernel do not report jiffies to user anymore and 'ms' could be better, I guess usually we care about how much the percentage is on a particular node? > > Note that cpuacct v1 controller used to report such percpu runtime > stats. The v2 implementation would rather build upon the rstat API. Support cgroup v2 is on the plan :-) let's mark this as todo currently, i suppose they may not share the same piece of code. Regards, Michael Wang > > Michal >
