Commit-ID: c37e17497e01fc0f5d2d6feb5723b210b3ab8890 Gitweb: http://git.kernel.org/tip/c37e17497e01fc0f5d2d6feb5723b210b3ab8890 Author: Stephane Eranian <eranian@xxxxxxxxxx> AuthorDate: Sun, 11 Dec 2011 00:28:52 +0100 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Wed, 21 Dec 2011 10:26:37 +0100 perf events: Add PERF_COUNT_HW_REF_CPU_CYCLES generic PMU event This event counts the number of reference core cpu cycles. Reference means that the event increments at a constant rate which is not subject to core CPU frequency adjustments. The event may not count when the processor is in halted (low power) state. As such, it may not be equivalent to wall clock time. However, when the processor is not halted state, the event keeps a constant correlation with wall clock time. Signed-off-by: Stephane Eranian <eranian@xxxxxxxxxx> Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Link: http://lkml.kernel.org/r/1323559734-3488-3-git-send-email-eranian@xxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- include/linux/perf_event.h | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 564769c..0885561 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -54,6 +54,7 @@ enum perf_hw_id { PERF_COUNT_HW_BUS_CYCLES = 6, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND = 7, PERF_COUNT_HW_STALLED_CYCLES_BACKEND = 8, + PERF_COUNT_HW_REF_CPU_CYCLES = 9, PERF_COUNT_HW_MAX, /* non-ABI */ }; -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html