* [PATCH] perf evlist: Extend arch_evsel__must_be_in_group to support hybrid systems
@ 2022-06-01 15:25 zhengjun.xing
2022-06-01 16:00 ` Ian Rogers
0 siblings, 1 reply; 2+ messages in thread
From: zhengjun.xing @ 2022-06-01 15:25 UTC (permalink / raw)
To: acme, peterz, mingo, alexander.shishkin, jolsa
Cc: linux-kernel, linux-perf-users, irogers, adrian.hunter, ak,
kan.liang, zhengjun.xing
From: Zhengjun Xing <zhengjun.xing@linux.intel.com>
For the hybrid system, the "slots" event changes to "cpu_core/slots/", need
extend API arch_evsel__must_be_in_group() to support hybrid systems.
In the origin code, for hybrid system event "cpu_core/slots/", the output
of the API arch_evsel__must_be_in_group() is "false" (in fact,it should be
"true"). Currently only one API evsel__remove_from_group() calls it. In
evsel__remove_from_group(), it adds the second condition to check, so the
output of evsel__remove_from_group() still is correct. That's the reason
why there isn't an instant error. I'd like to fix the issue found in API
arch_evsel__must_be_in_group() in case someone else using the function in
the other place.
Fixes: d98079c05b5a ("perf evlist: Keep topdown counters in weak group")
Signed-off-by: Zhengjun Xing <zhengjun.xing@linux.intel.com>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
---
tools/perf/arch/x86/util/evsel.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/arch/x86/util/evsel.c b/tools/perf/arch/x86/util/evsel.c
index 88306183d629..ff4561b7b600 100644
--- a/tools/perf/arch/x86/util/evsel.c
+++ b/tools/perf/arch/x86/util/evsel.c
@@ -57,6 +57,6 @@ bool arch_evsel__must_be_in_group(const struct evsel *evsel)
return false;
return evsel->name &&
- (!strcasecmp(evsel->name, "slots") ||
+ (strcasestr(evsel->name, "slots") ||
strcasestr(evsel->name, "topdown"));
}
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] perf evlist: Extend arch_evsel__must_be_in_group to support hybrid systems
2022-06-01 15:25 [PATCH] perf evlist: Extend arch_evsel__must_be_in_group to support hybrid systems zhengjun.xing
@ 2022-06-01 16:00 ` Ian Rogers
0 siblings, 0 replies; 2+ messages in thread
From: Ian Rogers @ 2022-06-01 16:00 UTC (permalink / raw)
To: zhengjun.xing
Cc: acme, peterz, mingo, alexander.shishkin, jolsa, linux-kernel,
linux-perf-users, adrian.hunter, ak, kan.liang
On Wed, Jun 1, 2022 at 8:25 AM <zhengjun.xing@linux.intel.com> wrote:
>
> From: Zhengjun Xing <zhengjun.xing@linux.intel.com>
>
> For the hybrid system, the "slots" event changes to "cpu_core/slots/", need
> extend API arch_evsel__must_be_in_group() to support hybrid systems.
>
> In the origin code, for hybrid system event "cpu_core/slots/", the output
> of the API arch_evsel__must_be_in_group() is "false" (in fact,it should be
> "true"). Currently only one API evsel__remove_from_group() calls it. In
> evsel__remove_from_group(), it adds the second condition to check, so the
> output of evsel__remove_from_group() still is correct. That's the reason
> why there isn't an instant error. I'd like to fix the issue found in API
> arch_evsel__must_be_in_group() in case someone else using the function in
> the other place.
>
> Fixes: d98079c05b5a ("perf evlist: Keep topdown counters in weak group")
> Signed-off-by: Zhengjun Xing <zhengjun.xing@linux.intel.com>
> Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Thanks,
Ian
> ---
> tools/perf/arch/x86/util/evsel.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/perf/arch/x86/util/evsel.c b/tools/perf/arch/x86/util/evsel.c
> index 88306183d629..ff4561b7b600 100644
> --- a/tools/perf/arch/x86/util/evsel.c
> +++ b/tools/perf/arch/x86/util/evsel.c
> @@ -57,6 +57,6 @@ bool arch_evsel__must_be_in_group(const struct evsel *evsel)
> return false;
>
> return evsel->name &&
> - (!strcasecmp(evsel->name, "slots") ||
> + (strcasestr(evsel->name, "slots") ||
> strcasestr(evsel->name, "topdown"));
> }
> --
> 2.25.1
>
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