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| author | Srikar Dronamraju <srikar@linux.vnet.ibm.com> | 2016-03-23 15:24:44 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-03-31 11:49:44 +0300 |
| commit | d02c071183e1c01a76811c878c8a52322201f81f (patch) | |
| tree | 98fb73f6d3e52cc148d7ac792add8588f46553f6 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | d740037fac7052e49450f6fa1454f1144a103b55 (diff) | |
| download | linux-d02c071183e1c01a76811c878c8a52322201f81f.tar.xz | |
sched/fair: Reset nr_balance_failed after active balancing
To force a task migration during active balancing, nr_balance_failed is set
to cache_nice_tries + 1. However nr_balance_failed is not reset. As a side
effect, the next regular load balance under the same sd, a cache hot task
might be migrated, just because nr_balance_failed count is high.
Resetting nr_balance_failed after a successful active balance ensures
that a hot task is not unreasonably migrated. This can be verified by
looking at othe number of hot task migrations reported by /proc/schedstat.
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1458735884-30105-1-git-send-email-srikar@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions