Commit c9fdfa14 authored May 14, 2015 by Stephane Eranian Committed by Ingo Molnar Jun 07, 2015

perf: add new PERF_SAMPLE_BRANCH_IND_JUMP branch sample type



This patch adds a new branch_sample_type flag to enable
filtering branch sampling to indirect jumps. The support
is subject to hardware or kernel software support on each
architecture.

Filtering on indirect jump is useful to study the targets
of the jump.

Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@redhat.com
Cc: dsahern@gmail.com
Cc: jolsa@redhat.com
Cc: kan.liang@intel.com
Cc: namhyung@kernel.org
Link: http://lkml.kernel.org/r/1431637800-31061-2-git-send-email-eranian@google.com


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

parent 519ce9fe

include/uapi/linux/perf_event.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -167,6 +167,7 @@ enum perf_branch_sample_type_shift {
		PERF_SAMPLE_BRANCH_COND_SHIFT = 10, /* conditional branches */

		PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT = 11, /* call/ret stack */
		PERF_SAMPLE_BRANCH_IND_JUMP_SHIFT = 12, /* indirect jumps */

		PERF_SAMPLE_BRANCH_MAX_SHIFT /* non-ABI */
		};
		@@ -186,6 +187,7 @@ enum perf_branch_sample_type {
		PERF_SAMPLE_BRANCH_COND = 1U << PERF_SAMPLE_BRANCH_COND_SHIFT,

		PERF_SAMPLE_BRANCH_CALL_STACK = 1U << PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT,
		PERF_SAMPLE_BRANCH_IND_JUMP = 1U << PERF_SAMPLE_BRANCH_IND_JUMP_SHIFT,

		PERF_SAMPLE_BRANCH_MAX = 1U << PERF_SAMPLE_BRANCH_MAX_SHIFT,
		};