Commit c229bf9d authored Oct 13, 2015 by Stephane Eranian Committed by Ingo Molnar Oct 20, 2015

perf: Add PERF_SAMPLE_BRANCH_CALL



Add a new branch sample type to cover only call branches (function calls).
The current ANY_CALL included direct, indirect calls and far jumps.

We want to be able to differentiate indirect from direct calls. Therefore
we introduce PERF_SAMPLE_BRANCH_CALL. The implementation is up to each
architecture.

Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: khandual@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1444720151-10275-2-git-send-email-eranian@google.com


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

parent b9511cd7

include/uapi/linux/perf_event.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -168,6 +168,7 @@ enum perf_branch_sample_type_shift {

		PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT = 11, /* call/ret stack */
		PERF_SAMPLE_BRANCH_IND_JUMP_SHIFT = 12, /* indirect jumps */
		PERF_SAMPLE_BRANCH_CALL_SHIFT = 13, /* direct call */

		PERF_SAMPLE_BRANCH_MAX_SHIFT /* non-ABI */
		};
		@@ -188,6 +189,7 @@ enum perf_branch_sample_type {

		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_CALL = 1U << PERF_SAMPLE_BRANCH_CALL_SHIFT,

		PERF_SAMPLE_BRANCH_MAX = 1U << PERF_SAMPLE_BRANCH_MAX_SHIFT,
		};