core_ctl: un-isolate BIG CPUs more aggressively
The current algorithm to bring additional BIG CPUs is very
conservative. It works when BIG tasks alone run on BIG
cluster. When co-location and scheduler boost features
are activated, small/medium tasks also run on BIG cluster.
We don't want these tasks to downmigrate, when BIG CPUs are
available but isolated. The following changes are done to
un-isolate CPUs more aggressively.
(1) Round up the big_avg. When the big_avg indicates that
there are 1.5 tasks on an average in the last window, it
indicates that we need 2 BIG CPUs not 1 BIG CPU.
(2) Track the maximum number of running tasks in the last
window on all CPUs. If any of the CPU in a cluster has more
than 4 runnable tasks in the last window, bring an additional
CPU to help out.
Change-Id: Id05d9983af290760cec6d93d1bdc45bc5e924cce
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 4a9c625..8c1746a 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -1834,24 +1834,30 @@ TRACE_EVENT(sched_overutilized,
TRACE_EVENT(sched_get_nr_running_avg,
- TP_PROTO(int avg, int big_avg, int iowait_avg),
+ TP_PROTO(int avg, int big_avg, int iowait_avg,
+ unsigned int max_nr, unsigned int big_max_nr),
- TP_ARGS(avg, big_avg, iowait_avg),
+ TP_ARGS(avg, big_avg, iowait_avg, max_nr, big_max_nr),
TP_STRUCT__entry(
__field( int, avg )
__field( int, big_avg )
__field( int, iowait_avg )
+ __field( unsigned int, max_nr )
+ __field( unsigned int, big_max_nr )
),
TP_fast_assign(
__entry->avg = avg;
__entry->big_avg = big_avg;
__entry->iowait_avg = iowait_avg;
+ __entry->max_nr = max_nr;
+ __entry->big_max_nr = big_max_nr;
),
- TP_printk("avg=%d big_avg=%d iowait_avg=%d",
- __entry->avg, __entry->big_avg, __entry->iowait_avg)
+ TP_printk("avg=%d big_avg=%d iowait_avg=%d max_nr=%u big_max_nr=%u",
+ __entry->avg, __entry->big_avg, __entry->iowait_avg,
+ __entry->max_nr, __entry->big_max_nr)
);
TRACE_EVENT(core_ctl_eval_need,