Ping.
Accounting forced idle time for per cpu can help us measure the cost of
enabling core scheduling from a global perspective. Mind having a look
at it?
在 2021/12/23 下午8:30, Cruz Zhao 写道:
> Josh Don's patch 4feee7d12603 ("sched/core: Forced idle accounting")
> provides one means to measure the cost of enabling core scheduling
> from the perspective of the task, and this patchset provides another
> means to do that from the perspective of the cpu.
>
> Forced idle can be divided into two types, forced idle with cookie'd task
> running on it SMT sibling, and forced idle with uncookie'd task running
> on it SMT sibling, which should be accounting to measure the cost of
> enabling core scheduling too. This patchset accounts both and the sum
> of both, which are displayed via /proc/stat.
>
> Cruz Zhao (2):
> sched/core: Cookied forceidle accounting per cpu
> sched/core: Uncookied force idle accounting per cpu
>
> fs/proc/stat.c | 26 ++++++++++++++++++++++++++
> include/linux/kernel_stat.h | 4 ++++
> kernel/sched/core.c | 7 +++----
> kernel/sched/core_sched.c | 21 +++++++++++++++++++--
> kernel/sched/sched.h | 10 ++--------
> 5 files changed, 54 insertions(+), 14 deletions(-)
>
> base commit: 2850c2311ef4bf30ae8dd8927f0f66b026ff08fb
