linux-kernel - [patch 01/11] perf_event_open.2: 4.1 PERF_SAMPLE_BRANCH_CALL

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Date:	Thu, 23 Jul 2015 13:08:16 -0400 (EDT)
From:	Vince Weaver <vincent.weaver@...ne.edu>
To:	"Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
cc:	linux-man@...r.kernel.org, linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Stephane Eranian <eranian@...gle.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Andy Lutomirski <luto@...capital.net>,
	Kan Liang <kan.liang@...el.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Vince Weaver <vincent.weaver@...ne.edu>
Subject: [patch 01/11] perf_event_open.2: 4.1 PERF_SAMPLE_BRANCH_CALL_STACK


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@...radead.org>

	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@...radead.org>
	Cc: Jiri Olsa <jolsa@...hat.com>
	Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
	Cc: Andy Lutomirski <luto@...capital.net>
	Cc: Kan Liang <kan.liang@...el.com>
	Cc: Linus Torvalds <torvalds@...ux-foundation.org>
	Cc: Paul Mackerras <paulus@...ba.org>
	Cc: Vince Weaver <vincent.weaver@...ne.edu>
	Cc: linux-api@...r.kernel.org
	Link: http://lkml.kernel.org/r/20141105093759.GQ10501@worktop.programming.kicks-ass.net
	Signed-off-by: Ingo Molnar <mingo@...nel.org>

Signed-off-by: Vince Weaver <vincent.weaver@...ne.edu>

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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