perf, x86: Prefer fixed-purpose counters when scheduling

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This avoids a scheduling failure for cases like:

  cycles, cycles, instructions, instructions (on Core2)

Which would end up being programmed like:

  PMC0, PMC1, FP-instructions, fail

Because all events will have the same weight.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-8tnwb92asqj7xajqqoty4gel@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Peter Zijlstra 2011-11-10 15:15:42 +01:00 • committed by Ingo Molnar

parent bc1738f6ee

commit 4defea8559

1 changed files with 14 additions and 5 deletions

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arch/x86/kernel/cpu/perf_event.c

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