perf_counter: optimize mmap/comm tracking

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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>

...

This commit is contained in:

Peter Zijlstra 2009-04-09 10:53:44 +02:00 • committed by Ingo Molnar

parent b3828ebb39

commit 9ee318a782

1 changed files with 36 additions and 3 deletions

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kernel/perf_counter.c

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