[tip:perf/core] perf bench mem: The -o and -n options are mutually exclusive

[tip-bot for Davidlohr Bueso]

Commit-ID:  424e9634887842ac59c1d06d3264aaeb18853c0b
Gitweb:     http://git.kernel.org/tip/424e9634887842ac59c1d06d3264aaeb18853c0b
Author:     Davidlohr Bueso <davidlohr@xxxxxx>
AuthorDate: Mon, 16 Jun 2014 11:14:25 -0700
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 19 Jun 2014 16:13:16 -0300

perf bench mem: The -o and -n options are mutually exclusive

 -o, --only-prefault   Show only the result with page faults before mem*
 -n, --no-prefault     Show only the result without page faults before mem*

Makes no sense to call together. Applies to both memset and memcpy.

Signed-off-by: Davidlohr Bueso <davidlohr@xxxxxx>
Cc: Aswin Chandramouleeswaran <aswin@xxxxxx>
Cc: Hitoshi Mitake <mitake@xxxxxxxxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1402942467-10671-8-git-send-email-davidlohr@xxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/bench/mem-memcpy.c | 5 +++++
 tools/perf/bench/mem-memset.c | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/tools/perf/bench/mem-memcpy.c b/tools/perf/bench/mem-memcpy.c
index 5ce71d3..e622c3e 100644
--- a/tools/perf/bench/mem-memcpy.c
+++ b/tools/perf/bench/mem-memcpy.c
@@ -189,6 +189,11 @@ int bench_mem_memcpy(int argc, const char **argv,
 	argc = parse_options(argc, argv, options,
 			     bench_mem_memcpy_usage, 0);
 
+	if (no_prefault && only_prefault) {
+		fprintf(stderr, "Invalid options: -o and -n are mutually exclusive\n");
+		return 1;
+	}
+
 	if (use_cycle)
 		init_cycle();
 
diff --git a/tools/perf/bench/mem-memset.c b/tools/perf/bench/mem-memset.c
index 9af79d2..2a65468 100644
--- a/tools/perf/bench/mem-memset.c
+++ b/tools/perf/bench/mem-memset.c
@@ -181,6 +181,11 @@ int bench_mem_memset(int argc, const char **argv,
 	argc = parse_options(argc, argv, options,
 			     bench_mem_memset_usage, 0);
 
+	if (no_prefault && only_prefault) {
+		fprintf(stderr, "Invalid options: -o and -n are mutually exclusive\n");
+		return 1;
+	}
+
 	if (use_cycle)
 		init_cycle();
 
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