Re: [PATCH 0/3] sched/numa: introduce advanced numa statistic

王贇
2019-11-20T09:45:19Z

Hi, Mel

I hope this version has addressed the issues you mentioned :-)

Does it looks better now?

Regards,
Michael Wang

On 2019/11/13 上午11:43, 王贇 wrote:
> Modern production environment could use hundreds of cgroup to control
> the resources for different workloads, along with the complicated
> resource binding.
>
> On NUMA platforms where we have multiple nodes, things become even more
> complicated, we hope there are more local memory access to improve the
> performance, and NUMA Balancing keep working hard to achieve that,
> however, wrong memory policy or node binding could easily waste the
> effort, result a lot of remote page accessing.
>
> We need to perceive such problems, then we got chance to fix it before
> there are too much damages, however, there are no good approach yet to
> help catch the mouse who introduced the remote access.
>
> This patch set is trying to fill in the missing pieces， by introduce
> the per-cgroup NUMA locality/exectime statistics, and expose the per-task
> page migration failure counter, with these statistics, we could achieve
> the daily monitoring on NUMA efficiency, to give warning when things going
> too wrong.
>
> Please check the third patch for more details.
>
> Thanks to Peter, Mel and Michal for the good advices :-)
>
> Michael Wang (3):
> sched/numa: advanced per-cgroup numa statistic
> sched/numa: expose per-task pages-migration-failure counter
> sched/numa: documentation for per-cgroup numa stat
>
> Documentation/admin-guide/cg-numa-stat.rst | 161 ++++++++++++++++++++++++
> Documentation/admin-guide/kernel-parameters.txt | 4 +
> Documentation/admin-guide/sysctl/kernel.rst | 9 ++
> include/linux/sched.h | 18 ++-
> include/linux/sched/sysctl.h | 6 +
> init/Kconfig | 9 ++
> kernel/sched/core.c | 91 ++++++++++++++
> kernel/sched/debug.c | 1 +
> kernel/sched/fair.c | 33 +++++
> kernel/sched/sched.h | 17 +++
> kernel/sysctl.c | 11 ++
> 11 files changed, 359 insertions(+), 1 deletion(-)
> create mode 100644 Documentation/admin-guide/cg-numa-stat.rst
>
>