lkml.org 
[lkml]   [2020]   [Sep]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 14/14] perf mem: Document options introduced by Arm SPE
Date
Document new options which is introduced by Arm SPE, the event type
'ldst' is added for recording both load and store memory operations;
and adds the information for '--itrace=M' which can be used to
synthesize memory samples for Arm SPE.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
---
tools/perf/Documentation/perf-mem.txt | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/tools/perf/Documentation/perf-mem.txt b/tools/perf/Documentation/perf-mem.txt
index 199ea0f0a6c0..2455d485044f 100644
--- a/tools/perf/Documentation/perf-mem.txt
+++ b/tools/perf/Documentation/perf-mem.txt
@@ -38,7 +38,12 @@ OPTIONS

-t::
--type=<type>::
- Select the memory operation type: load or store (default: load,store)
+ Select the memory operation type: load, store, ldst (default: load,store).
+ The type 'ldst' means the single event can record both for load and store
+ operations; on Intel and PowerPC systems, the types 'load' and 'store' are
+ supported but misses the type 'ldst'; on Arm64 system, it uses SPE AUX
+ trace data to generate memory events, so need to specify one of these
+ three types.

-D::
--dump-raw-samples::
@@ -84,6 +89,9 @@ RECORD OPTIONS
--ldlat <n>::
Specify desired latency for loads event. (x86 only)

+--itrace=M::
+ Synthesize memory samples from the AUX trace data. (Arm SPE only)
+
In addition, for report all perf report options are valid, and for record
all perf record options.

--
2.20.1
\
 
 \ /
  Last update: 2020-09-01 10:39    [W:0.100 / U:0.356 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site