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@hp.com>
Cc: Aswin Chandramouleeswaran <aswin@hp.com>
Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1402942467-10671-8-git-send-email-davidlohr@hp.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 10 insertions, 0 deletions

diff --git a/tools/perf/bench/mem-memcpy.c b/tools/perf/bench/mem-memcpy.c
index 5ce71d3b72cf..e622c3e96efc 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 9af79d2b18e5..2a65468619f0 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();