This manpage patch relates to the addition of the
PERF_SAMPLE_BRANCH_CALL_STACK functionaliry added in the
following commit:
commit 2c44b1936bb3b135a3fac8b3493394d42e51cf70
Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
perf/x86/intel: Expose LBR callstack to user space tooling
With LBR call stack feature enable, there are three callchain options.
Enable the 3rd callchain option (LBR callstack) to user space tooling.
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Vince Weaver <vincent.weaver@xxxxxxxxx>
Cc: linux-api@xxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/20141105093759.GQ10501@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Vince Weaver <vincent.weaver@xxxxxxxxx>
diff --git a/man2/perf_event_open.2 b/man2/perf_event_open.2
index 856ec64..71bfb17 100644
--- a/man2/perf_event_open.2
+++ b/man2/perf_event_open.2
@@ -1240,6 +1240,11 @@ Branch in transactional memory transaction.
.BR PERF_SAMPLE_BRANCH_NO_TX " (since Linux 3.11)"
.\" commit 135c5612c460f89657c4698fe2ea753f6f667963
Branch not in transactional memory transaction.
+.BR PERF_SAMPLE_BRANCH_CALL_STACK " (since Linux 4.1)"
+.\" commit 2c44b1936bb3b135a3fac8b3493394d42e51cf70
+Branch is part of a hardware generated call stack.
+This requires hardware support, currently only found
+on Intel x86 Haswell or newer.
.RE
.TP
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