Hi Peter, Ingo We have reformed the implementation for several times, now it's very simple and easy to use, there are also a document to guide admin on how to use not only the NUMA locality, but also other per-cgroup NUMA statistics, we hope this could make things easier for other NUMA users. As now there are no more comments, would you please take a look at this patch set, see if it's good enough to be picked? Regards, Michael Wang On 2019/12/5 下午2:53, 王贇 wrote: > Since v4: > * improved documentation > Since v3: > * fix comments and improved documentation > Since v2: > * simplified the locality concept & implementation > Since v1: > * improved documentation > > 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 notice such problems, then we got chance to fix it before > there are too much damages, however, there are no good monitoring > 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 info, with this new statistics, we could > achieve the daily monitoring on NUMA efficiency, to give warning when > things going too wrong. > > Please check the second patch for more details. > > Michael Wang (2): > sched/numa: introduce per-cgroup NUMA locality info > sched/numa: documentation for per-cgroup numa statistics > > Documentation/admin-guide/cg-numa-stat.rst | 178 ++++++++++++++++++++++++ > Documentation/admin-guide/index.rst | 1 + > Documentation/admin-guide/kernel-parameters.txt | 4 + > Documentation/admin-guide/sysctl/kernel.rst | 9 ++ > include/linux/sched.h | 15 ++ > include/linux/sched/sysctl.h | 6 + > init/Kconfig | 11 ++ > kernel/sched/core.c | 75 ++++++++++ > kernel/sched/fair.c | 62 +++++++++ > kernel/sched/sched.h | 12 ++ > kernel/sysctl.c | 11 ++ > 11 files changed, 384 insertions(+) > create mode 100644 Documentation/admin-guide/cg-numa-stat.rst >
