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

[çè]

Hi, Peter

How do you think about this version, does it looks fine to you?

Regards,
Michael Wang

On 2019/11/13 äå11:43, çè 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 piecesï 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
> 
>