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authorJiri Olsa <jolsa@kernel.org>2017-03-05 17:40:11 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-03-06 12:39:30 -0300
commit001916b94a04809a94abb07daba6f9ace01906ba (patch)
tree243689550f762ede18e1f835deb439115045dd0d /tools/perf/bench
parentc8c188679ccfc86d9c7bac57ecf4b8205a061a06 (diff)
downloadlinux-001916b94a04809a94abb07daba6f9ace01906ba.tar.bz2
perf bench numa: Add more comment for -c option
Adding more commentary for -c/--show_convergence option, to explain how the convergence is defined. Before: -c, --show_convergence show convergence details Now: -c, --show_convergence convergence is reached when each process \ (all its threads) is running on a single NUMA node. Suggested--by: Jiri Hladky <jhladky@redhat.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Hladky <jhladky@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1488732011-27384-1-git-send-email-jolsa@kernel.org [ Rephrased a bit based on a IRC conversation with Jiri ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/bench')
-rw-r--r--tools/perf/bench/numa.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/bench/numa.c b/tools/perf/bench/numa.c
index 3083fc36282b..6bd0581de298 100644
--- a/tools/perf/bench/numa.c
+++ b/tools/perf/bench/numa.c
@@ -187,7 +187,8 @@ static const struct option options[] = {
OPT_INCR ('d', "show_details" , &p0.show_details, "Show details"),
OPT_INCR ('a', "all" , &p0.run_all, "Run all tests in the suite"),
OPT_INTEGER('H', "thp" , &p0.thp, "MADV_NOHUGEPAGE < 0 < MADV_HUGEPAGE"),
- OPT_BOOLEAN('c', "show_convergence", &p0.show_convergence, "show convergence details"),
+ OPT_BOOLEAN('c', "show_convergence", &p0.show_convergence, "show convergence details, "
+ "convergence is reached when each process (all its threads) is running on a single NUMA node."),
OPT_BOOLEAN('m', "measure_convergence", &p0.measure_convergence, "measure convergence latency"),
OPT_BOOLEAN('q', "quiet" , &p0.show_quiet, "quiet mode"),
OPT_BOOLEAN('S', "serialize-startup", &p0.serialize_startup,"serialize thread startup"),