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From: kan.liang@linux.intel.com
To: peterz@infradead.org, acme@redhat.com, linux-kernel@vger.kernel.org
Cc: eranian@google.com, ak@linux.intel.com, namhyung@kernel.org,
	irogers@google.com, Kan Liang <kan.liang@linux.intel.com>
Subject: [PATCH 2/2] perf docs: Update the documentation for the save_type filter
Date: Tue, 16 Aug 2022 05:56:12 -0700	[thread overview]
Message-ID: <20220816125612.2042397-2-kan.liang@linux.intel.com> (raw)
In-Reply-To: <20220816125612.2042397-1-kan.liang@linux.intel.com>

From: Kan Liang <kan.liang@linux.intel.com>

Update the documentation to reflect the kernel changes.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
 tools/perf/Documentation/perf-record.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 099817ef5150..d5c57ac1ee0a 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -397,6 +397,9 @@ following filters are defined:
 	- abort_tx: only when the target is a hardware transaction abort
 	- cond: conditional branches
 	- save_type: save branch type during sampling in case binary is not available later
+		     For the platforms with Intel Arch LBR support (12th-Gen+ client or
+		     4th-Gen Xeon+ server), the save branch type is unconditionally enabled
+		     when the taken branch stack sampling is enabled.
 
 +
 The option requires at least one branch type among any, any_call, any_ret, ind_call, cond.
-- 
2.35.1


  reply	other threads:[~2022-08-16 12:57 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-16 12:56 [PATCH 1/2] perf/x86/lbr: Enable the branch type for the Arch LBR by default kan.liang
2022-08-16 12:56 ` kan.liang [this message]
2022-08-25 13:23   ` [PATCH 2/2] perf docs: Update the documentation for the save_type filter Liang, Kan
2022-08-22  9:00 ` [tip: perf/urgent] perf/x86/lbr: Enable the branch type for the Arch LBR by default tip-bot2 for Kan Liang

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