[PATCH 9/9][v5] powerpc/perf: Update perf-mem man page for Power
From: Sukadev Bhattiprolu <hidden>
Date: 2013-10-02 00:16:06
Also in:
lkml
Subsystem:
performance events subsystem, the rest · Maintainers:
Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
Add a few lines to the perf-mem man page to indicate: - its dependence on the mem-loads and mem-stores events - how to use the feature on Power architecture. Signed-off-by: Sukadev Bhattiprolu <redacted> --- tools/perf/Documentation/perf-mem.txt | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/tools/perf/Documentation/perf-mem.txt b/tools/perf/Documentation/perf-mem.txt
index 888d511..f4881a0 100644
--- a/tools/perf/Documentation/perf-mem.txt
+++ b/tools/perf/Documentation/perf-mem.txt@@ -18,6 +18,17 @@ from it, into perf.data. Perf record options are accepted and are passed through "perf mem -t <TYPE> report" displays the result. It invokes perf report with the right set of options to display a memory access profile. +This command works on architectures that implement *mem-loads* and *mem-stores* +perf events. + +The PowerPC architecture does not implement *mem-loads* and *mem-stores* +events. To get the memory hierarchy information for samples involving +memory loads and stores, use a marked event like PM_MRK_GRP_CMPL. + + perf record -d -e 'cpu/PM_MRK_GRP_CMPL/' <application> + + perf report -n --mem-mode + OPTIONS ------- <command>...::
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1.7.9.5