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(parent: b3828eb) | patch
perf_counter: optimize mmap/comm tracking
authorPeter Zijlstra <a.p.zijlstra@chello.nl>
Thu, 9 Apr 2009 08:53:44 +0000 (10:53 +0200)
committerIngo Molnar <mingo@elte.hu>
Thu, 9 Apr 2009 09:50:43 +0000 (11:50 +0200)
commit9ee318a7825929bc3734110b83ae8e20e53d9de3
tree4823b4e82bb99971559d3569c7f4d710ac7f232dtree | snapshot (tar.gz zip)
parentb3828ebb3901adfe989d8d4157ed28247aeec132commit | diff
perf_counter: optimize mmap/comm tracking

Impact: performance optimization

The mmap/comm tracking code does quite a lot of work before it discovers
there's no interest in it, avoid that by keeping a counter.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090409085524.427173196@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
kernel/perf_counter.c diff | blob | blame | history