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perf list: Skip unsupported events

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Some hardware events might not be supported on a system.  Listing those
events seems meaningless and confusing to users.  Let's skip them.

Before:
  $ perf list cache | wc -l
  33

After:
  $ perf list cache | wc -l
  27

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1377571313-14722-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2013-08-27 11:41:53 +09:00 committed by Arnaldo Carvalho de Melo
parent 395c307089
commit b41f1cec91
1 changed files with 39 additions and 2 deletions
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41
tools/perf/util/parse-events.c
View File

@ -15,6 +15,7 @@
#define YY_EXTRA_TYPE int
#include "parse-events-flex.h"
#include "pmu.h"
#include "thread_map.h"
#define MAX_NAME_LEN 100
@ -1076,6 +1077,33 @@ int is_valid_tracepoint(const char *event_string)
return 0;
}
static bool is_event_supported(u8 type, unsigned config)
{
bool ret = true;
struct perf_evsel *evsel;
struct perf_event_attr attr = {
.type = type,
.config = config,
.disabled = 1,
.exclude_kernel = 1,
};
struct {
struct thread_map map;
int threads[1];
} tmap = {
.map.nr = 1,
.threads = { 0 },
};
evsel = perf_evsel__new(&attr, 0);
if (evsel) {
ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
perf_evsel__delete(evsel);
}
return ret;
}
static void __print_events_type(u8 type, struct event_symbol *syms,
unsigned max)
{
@ -1083,14 +1111,16 @@ static void __print_events_type(u8 type, struct event_symbol *syms,
unsigned i;
for (i = 0; i < max ; i++, syms++) {
if (!is_event_supported(type, i))
continue;
if (strlen(syms->alias))
snprintf(name, sizeof(name), "%s OR %s",
syms->symbol, syms->alias);
else
snprintf(name, sizeof(name), "%s", syms->symbol);
printf(" %-50s [%s]\n", name,
event_type_descriptors[type]);
printf(" %-50s [%s]\n", name, event_type_descriptors[type]);
}
}
@ -1119,6 +1149,10 @@ int print_hwcache_events(const char *event_glob, bool name_only)
if (event_glob != NULL && !strglobmatch(name, event_glob))
continue;
if (!is_event_supported(PERF_TYPE_HW_CACHE,
type | (op << 8) | (i << 16)))
continue;
if (name_only)
printf("%s ", name);
else
@ -1148,6 +1182,9 @@ static void print_symbol_events(const char *event_glob, unsigned type,
(syms->alias && strglobmatch(syms->alias, event_glob))))
continue;
if (!is_event_supported(type, i))
continue;
if (name_only) {
printf("%s ", syms->symbol);
continue;