Commit 54d751d4 authored Feb 22, 2016 by Thomas Gleixner Committed by Ingo Molnar Feb 29, 2016

perf: Allow storage of PMU private data in event



For PMUs which are not per CPU, but e.g. per package/socket, we want to be
able to store a reference to the underlying per package/socket facility in the
event at init time so we can avoid magic storage constructs in the PMU driver.

This allows us to get rid of the per CPU dance in the intel uncore and RAPL
drivers and avoids a lookup of the per package data in the perf hotpath.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221011.364140369@linutronix.de


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 1384c704

include/linux/perf_event.h

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -468,6 +468,7 @@ struct perf_event {
	int group_flags;		int group_flags;
	struct perf_event *group_leader;		struct perf_event *group_leader;
	struct pmu *pmu;		struct pmu *pmu;
			void *pmu_private;

	enum perf_event_active_state state;		enum perf_event_active_state state;
	unsigned int attach_state;		unsigned int attach_state;