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Groups > linux.kernel > #1245399

[PATCH 4/4] perf record: add ability to sample call branches

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This patch add a new branch type sampling filter to perf record.
It is named 'call' and maps to PERF_SAMPLE_BRANCH_CALL. It samples
direct call branches only, unlike 'any_call' which includes indirect
calls as well.

 $ perf record -j call -e cycles .....

The man page is updated accordingly.

Signed-off-by: Stephane Eranian <eranian@google.com>
---
 tools/perf/Documentation/perf-record.txt | 1 +
 tools/perf/util/parse-branch-options.c   | 1 +
 2 files changed, 2 insertions(+)

diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 2e9ce77..b027d28 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -236,6 +236,7 @@ It is possible to select the types of branches captured by enabling filters. The
         - any_call: any function call or system call
         - any_ret: any function return or system call return
         - ind_call: any indirect branch
+        - call: direct calls, including far (to/from kernel) calls
         - u:  only when the branch target is at the user level
         - k: only when the branch target is in the kernel
         - hv: only when the target is at the hypervisor level
diff --git a/tools/perf/util/parse-branch-options.c b/tools/perf/util/parse-branch-options.c
index a3b1e13..355eecf 100644
--- a/tools/perf/util/parse-branch-options.c
+++ b/tools/perf/util/parse-branch-options.c
@@ -27,6 +27,7 @@ static const struct branch_mode branch_modes[] = {
 	BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NO_TX),
 	BRANCH_OPT("cond", PERF_SAMPLE_BRANCH_COND),
 	BRANCH_OPT("ind_jmp", PERF_SAMPLE_BRANCH_IND_JUMP),
+	BRANCH_OPT("call", PERF_SAMPLE_BRANCH_CALL),
 	BRANCH_END
 };
 
-- 
1.9.1

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[PATCH 0/4] perf: add ability to sample direct call branches Stephane Eranian <eranian@google.com> - 2015-10-13 09:10 +0200
  [PATCH 3/4] perf/powerpc: add support for PERF_SAMPLE_BRANCH_CALL Stephane Eranian <eranian@google.com> - 2015-10-13 09:20 +0200
  [PATCH 4/4] perf record: add ability to sample call branches Stephane Eranian <eranian@google.com> - 2015-10-13 09:20 +0200
  [PATCH 1/4] perf: add PERF_SAMPLE_BRANCH_CALL Stephane Eranian <eranian@google.com> - 2015-10-13 09:20 +0200
  [PATCH 2/4] perf/x86: add support for PERF_SAMPLE_BRANCH_CALL Stephane Eranian <eranian@google.com> - 2015-10-13 09:20 +0200
    Re: [PATCH 2/4] perf/x86: add support for PERF_SAMPLE_BRANCH_CALL Ingo Molnar <mingo@kernel.org> - 2015-10-13 15:50 +0200
      Re: [PATCH 2/4] perf/x86: add support for PERF_SAMPLE_BRANCH_CALL Andi Kleen <ak@linux.intel.com> - 2015-10-13 17:50 +0200
      Re: [PATCH 2/4] perf/x86: add support for PERF_SAMPLE_BRANCH_CALL Stephane Eranian <eranian@google.com> - 2015-10-14 02:40 +0200

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