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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-06-19 18:27:26 +0200
committerIngo Molnar <mingo@elte.hu>2009-06-23 11:42:44 +0200
commitf29ac756a40d0f1bb07d682ea521e7b666ff06d5 (patch)
tree6fabe2f38ae10f824e57fdd5b035ba81b75a71a8 /kernel/sys.c
parent3d906ef10a539ff336010afab8f6f9c4fe379695 (diff)
perf_counter: Optimize perf_swcounter_event()
Similar to tracepoints, use an enable variable to reduce overhead when unused. Only look for a counter of a particular event type when we know there is at least one in the system. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sys.c')
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