diff options
| author | Tim Chen <tim.c.chen@linux.intel.com> | 2014-12-12 15:38:12 -0800 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2015-03-06 00:39:19 +0000 |
| commit | 985504f71bb0ca24ac647c72446cc621980aef9f (patch) | |
| tree | 2cb7704ebe77dd284fa26690dd85a3ba89c0036f /lib/debugobjects.c | |
| parent | c0a74eb2b093cd781f216306cc5a1e5825835d74 (diff) | |
sched/rt: Reduce rq lock contention by eliminating locking of non-feasible target
commit 80e3d87b2c5582db0ab5e39610ce3707d97ba409 upstream.
This patch adds checks that prevens futile attempts to move rt tasks
to a CPU with active tasks of equal or higher priority.
This reduces run queue lock contention and improves the performance of
a well known OLTP benchmark by 0.7%.
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Shawn Bohrer <sbohrer@rgmadvisors.com>
Cc: Suruchi Kadu <suruchi.a.kadu@intel.com>
Cc: Doug Nelson<doug.nelson@intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1421430374.2399.27.camel@schen9-desk2.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'lib/debugobjects.c')
0 files changed, 0 insertions, 0 deletions