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 <suka...@linux.vnet.ibm.com> --- 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>...:: -- 1.7.9.5 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev