* Intel SPR: perf-record doesn't support topdown events?
@ 2024-10-22 16:40 laksono
2024-10-30 0:02 ` Namhyung Kim
0 siblings, 1 reply; 4+ messages in thread
From: laksono @ 2024-10-22 16:40 UTC (permalink / raw)
To: linux-perf-users
All,
I am interested in using Intel TMA support in Linux perf. I can run
$ perf stat -e '{slots,topdown-be-bound}' ...
on Intel SPR with no problem, but running with perf record doesn't work:
$ perf record -e '{slots,topdown-be-bound}' ...
Error:
The sys_perf_event_open() syscall returned with 22 (Invalid argument)
for event (topdown-be-bound).
I suspect MSR_PERF_METRICS cannot be used in the perf_event sampling
mode. Could someone (probably from Intel) confirm?
My Linux kernel: 5.15.0-86-generic #96-Ubuntu (just in case this matters).
Regards
Laksono Adhianto
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Intel SPR: perf-record doesn't support topdown events?
2024-10-22 16:40 Intel SPR: perf-record doesn't support topdown events? laksono
@ 2024-10-30 0:02 ` Namhyung Kim
2024-10-30 1:00 ` laksono
0 siblings, 1 reply; 4+ messages in thread
From: Namhyung Kim @ 2024-10-30 0:02 UTC (permalink / raw)
To: laksono, Kan Liang; +Cc: linux-perf-users
Hello,
Adding Kan to the circle.
On Tue, Oct 22, 2024 at 11:40:25AM -0500, laksono wrote:
> All,
>
> I am interested in using Intel TMA support in Linux perf. I can run
>
> $ perf stat -e '{slots,topdown-be-bound}' ...
>
> on Intel SPR with no problem, but running with perf record doesn't work:
>
> $ perf record -e '{slots,topdown-be-bound}' ...
> Error:
> The sys_perf_event_open() syscall returned with 22 (Invalid argument)
> for event (topdown-be-bound).
>
> I suspect MSR_PERF_METRICS cannot be used in the perf_event sampling
> mode. Could someone (probably from Intel) confirm?
I guess you need the leader sampling with 'S' modifier.
$ perf record -e '{slots,topdown-be-bound}:S' ...
Thanks,
Namhyung
>
> My Linux kernel: 5.15.0-86-generic #96-Ubuntu (just in case this matters).
>
> Regards
>
> Laksono Adhianto
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Intel SPR: perf-record doesn't support topdown events?
2024-10-30 0:02 ` Namhyung Kim
@ 2024-10-30 1:00 ` laksono
2024-10-30 12:57 ` Liang, Kan
0 siblings, 1 reply; 4+ messages in thread
From: laksono @ 2024-10-30 1:00 UTC (permalink / raw)
To: Namhyung Kim; +Cc: Kan Liang, linux-perf-users
Hi Namhyung
On Tue, Oct 29, 2024 at 7:02 PM Namhyung Kim <namhyung@kernel.org> wrote:
>
> I guess you need the leader sampling with 'S' modifier.
>
> $ perf record -e '{slots,topdown-be-bound}:S' ...
>
Unfortunately, it doesn't work for me:
$ perf record -e '{slots,topdown-be-bound}:S' ...
Error:
The sys_perf_event_open() syscall returned with 22 (Invalid argument)
for event (topdown-be-bound).
/bin/dmesg | grep -i perf may provide additional information.
Regards
Laksono
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Intel SPR: perf-record doesn't support topdown events?
2024-10-30 1:00 ` laksono
@ 2024-10-30 12:57 ` Liang, Kan
0 siblings, 0 replies; 4+ messages in thread
From: Liang, Kan @ 2024-10-30 12:57 UTC (permalink / raw)
To: laksono, Namhyung Kim; +Cc: linux-perf-users
On 2024-10-29 9:00 p.m., laksono wrote:
> Hi Namhyung
>
> On Tue, Oct 29, 2024 at 7:02 PM Namhyung Kim <namhyung@kernel.org> wrote:
>>
>> I guess you need the leader sampling with 'S' modifier.
>>
>> $ perf record -e '{slots,topdown-be-bound}:S' ...
>>
> Unfortunately, it doesn't work for me:
The issue should have been fixed by the below patch set.
https://lore.kernel.org/lkml/20240913084712.13861-1-dapeng1.mi@linux.intel.com/
You may have to use the latest perf-tools-next branch.
Thanks,
Kan
>
> $ perf record -e '{slots,topdown-be-bound}:S' ...
> Error:
> The sys_perf_event_open() syscall returned with 22 (Invalid argument)
> for event (topdown-be-bound).
> /bin/dmesg | grep -i perf may provide additional information.
>
> Regards
>
> Laksono
>
^ permalink raw reply [flat|nested] 4+ messages in thread
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2024-10-22 16:40 Intel SPR: perf-record doesn't support topdown events? laksono
2024-10-30 0:02 ` Namhyung Kim
2024-10-30 1:00 ` laksono
2024-10-30 12:57 ` Liang, Kan
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