From 001916b94a04809a94abb07daba6f9ace01906ba Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Sun, 5 Mar 2017 17:40:11 +0100 Subject: [PATCH] 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 Signed-off-by: Jiri Olsa Cc: David Ahern Cc: Jiri Hladky Cc: Namhyung Kim Cc: Peter Zijlstra 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 --- tools/perf/bench/numa.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) 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"),