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| author | Ingo Molnar <mingo@elte.hu> | 2011-04-28 18:17:11 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-04-28 08:39:39 +0200 |
| commit | f9cef0a90c4e7637f1ec98474a1a099aec45eb65 (patch) | |
| tree | 6a7b6bd456a274070f83d75fa1e7f97d90f32e8e /kernel/Kconfig.preempt | |
| parent | 8a850cadca0e387c87a0911a61e99fd66aeb57ec (diff) | |
| download | op-kernel-dev-f9cef0a90c4e7637f1ec98474a1a099aec45eb65.zip op-kernel-dev-f9cef0a90c4e7637f1ec98474a1a099aec45eb65.tar.gz | |
perf stat: Add --sync/-S option
--sync will tell perf stat to run sync() before starting a command.
This allows IO-heavy tests to be used with --repeat, without one
iteration impacting the other.
Elapsed time will stabilize for example:
before: 3.971525714 seconds time elapsed ( +- 8.56% )
after: 3.211098537 seconds time elapsed ( +- 1.52% )
So measurements will be more accurate.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/n/tip-7y40wib8n1eqio7hjpn1dsrm@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/Kconfig.preempt')
0 files changed, 0 insertions, 0 deletions
