diff options
| author | Vincent Guittot <vincent.guittot@linaro.org> | 2019-10-18 15:26:32 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-10-21 09:40:54 +0200 |
| commit | 5e23e474431529b7d1480f649ce33d0e9c1b2e48 (patch) | |
| tree | 593f33b072f7eeee7c3d7a9313729897aa111ec7 /kernel/sched/cpuacct.c | |
| parent | 0b0695f2b34a4afa3f6e9aa1ff0e5336d8dad912 (diff) | |
sched/fair: Use rq->nr_running when balancing load
CFS load_balance() only takes care of CFS tasks whereas CPUs can be used by
other scheduling classes. Typically, a CFS task preempted by an RT or deadline
task will not get a chance to be pulled by another CPU because
load_balance() doesn't take into account tasks from other classes.
Add sum of nr_running in the statistics and use it to detect such
situations.
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Ben Segall <bsegall@google.com>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Morten.Rasmussen@arm.com
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: hdanton@sina.com
Cc: parth@linux.ibm.com
Cc: pauld@redhat.com
Cc: quentin.perret@arm.com
Cc: riel@surriel.com
Cc: srikar@linux.vnet.ibm.com
Cc: valentin.schneider@arm.com
Link: https://lkml.kernel.org/r/1571405198-27570-6-git-send-email-vincent.guittot@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/cpuacct.c')
0 files changed, 0 insertions, 0 deletions