[PATCH] perf bench numa: Add more comment for -c option

From: Jiri Olsa
Date: Sun Mar 05 2017 - 11:40:36 EST


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
show convergence details, convergence is reached \
when each process (all its threads) are running on the single NUMA node

Suggested--by: Jiri Hladky <jhladky@xxxxxxxxxx>
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-jt15298zr1ajgonuvt8c88z1@xxxxxxxxxxxxxx
---
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..18b855ae5df6 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) are running on the 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"),
--
2.7.4