perf tools: Accept case-insensitive symbolic event variants

We currently fail on something like '-e CPU-migrations', with:

  invalid or unsupported event: 'CPU-migrations'

While 'CPU-migrations' is how we actually print out the event
in the default perf stat output:

 Performance counter stats for 'true':

          0.202204 task-clock-msecs         #      0.282 CPUs
                 0 context-switches         #      0.000 M/sec
                 0 CPU-migrations           #      0.000 M/sec

So change the matching to be case-insensitive.

Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/n/tip-omcm3edjjtx83a4kh2e244se@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 1869e4c..8e54bdb 100644 (file)
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -649,13 +649,15 @@ static int check_events(const char *str, unsigned int i)
        int n;
 
        n = strlen(event_symbols[i].symbol);
-       if (!strncmp(str, event_symbols[i].symbol, n))
+       if (!strncasecmp(str, event_symbols[i].symbol, n))
                return n;
 
        n = strlen(event_symbols[i].alias);
-       if (n)
-               if (!strncmp(str, event_symbols[i].alias, n))
+       if (n) {
+               if (!strncasecmp(str, event_symbols[i].alias, n))
                        return n;
+       }
+
        return 0;
 }