Re: [RFC PATCH v2 0/4] Introduce group balancer

[Tianchen Ding]

Ping~
Any idea for this patchset? :-)

On 2022/3/8 17:26, Tianchen Ding wrote:
> Modern platform are growing fast on CPU numbers. To achieve better
> utility of CPU resource, multiple apps are starting to sharing the CPUs.
>
> What we need is a way to ease confliction in share mode,
> make groups as exclusive as possible, to gain both performance
> and resource efficiency.
>
> The main idea of group balancer is to fulfill this requirement
> by balancing groups of tasks among groups of CPUs, consider this
> as a dynamic demi-exclusive mode. Task trigger work to settle it's
> group into a proper partition (minimum predicted load), then try
> migrate itself into it. To gradually settle groups into the most
> exclusively partition.
>
> GB can be seen as an optimize policy based on load balance,
> it obeys the main idea of load balance and makes adjustment
> based on that.
>
> Our test on ARM64 platform with 128 CPUs shows that,
> throughput of sysbench memory is improved about 25%,
> and redis-benchmark is improved up to about 10%.
>
> See each patch for detail:
> The 1st patch introduces infrastructure.
> The 2nd patch introduces detail about partition info.
> The 3rd patch is the main part of group balancer.
> The 4th patch is about stats.
>
> v2:
> Put partition info and period settings to cpuset subsys of cgroup_v2.
>
> v1: https://lore.kernel.org/all/98f41efd-74b2-198a-839c-51b785b748a6@xxxxxxxxxxxxxxxxx/
>
> Michael Wang (1):
>    sched: Introduce group balancer
>
> Tianchen Ding (3):
>    sched, cpuset: Introduce infrastructure of group balancer
>    cpuset: Handle input of partition info for group balancer
>    cpuset, gb: Add stat for group balancer
>
>   include/linux/cpuset.h   |   5 +
>   include/linux/sched.h    |   5 +
>   include/linux/sched/gb.h |  70 ++++++
>   init/Kconfig             |  12 +
>   kernel/cgroup/cpuset.c   | 405 +++++++++++++++++++++++++++++++-
>   kernel/sched/Makefile    |   1 +
>   kernel/sched/core.c      |   5 +
>   kernel/sched/debug.c     |  10 +-
>   kernel/sched/fair.c      |  26 ++-
>   kernel/sched/gb.c        | 487 +++++++++++++++++++++++++++++++++++++++
>   kernel/sched/sched.h     |  14 ++
>   11 files changed, 1037 insertions(+), 3 deletions(-)
>   create mode 100644 include/linux/sched/gb.h
>   create mode 100644 kernel/sched/gb.c