Messages in this thread | | | From | Vincent Guittot <> | Subject | [PATCH v2 0/2] sched/rt: track rt rq utilization | Date | Mon, 19 Jun 2017 10:51:23 +0200 |
| |
When both cfs and rt tasks compete to run on a CPU, we can see some frequency drops with schedutil governor. In such case, the cfs_rq's utilization doesn't reflect anymore the utilization of cfs tasks but only the remaining part that is not used by rt tasks. We should monitor the stolen utilization and take it into account when selecting OPP.
Patch 1 tracks utilization of rt_rq. Patch 2 adds the rt_rq's utilization when selection OPP for cfs tasks
This patchset doesn't change the OPP selection policy for RT tasks
Change since v1: - Only a rebase. I have addressed the comments on previous version in patch 1/2
Vincent Guittot (2): sched/rt: add utilization tracking cpufreq/schedutil: add rt utilization tracking
kernel/sched/cpufreq_schedutil.c | 2 +- kernel/sched/fair.c | 21 +++++++++++++++++++++ kernel/sched/rt.c | 9 +++++++++ kernel/sched/sched.h | 3 +++ 4 files changed, 34 insertions(+), 1 deletion(-)
-- 2.7.4
| |