linux-kernel - RE: [PATCH] Remove some PMU events for FUJITSU-MONAKA

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Message-ID:
 <OSZPR01MB6908AA7CEB24ED38F9289D6DD4CC2@OSZPR01MB6908.jpnprd01.prod.outlook.com>
Date: Fri, 28 Feb 2025 09:55:05 +0000
From: "Yoshihiro Furudera (Fujitsu)" <fj5100bi@...itsu.com>
To: 'James Clark' <james.clark@...aro.org>
CC: John Garry <john.g.garry@...cle.com>, Will Deacon <will@...nel.org>, Mike
 Leach <mike.leach@...aro.org>, Leo Yan <leo.yan@...ux.dev>, Peter Zijlstra
	<peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de
 Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, Mark Rutland
	<mark.rutland@....com>, Alexander Shishkin
	<alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, Ian
 Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, "Liang,
 Kan" <kan.liang@...ux.intel.com>, "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "linux-perf-users@...r.kernel.org"
	<linux-perf-users@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "Akio Kakuno (Fujitsu)"
	<fj3333bs@...itsu.com>
Subject: RE: [PATCH] Remove some PMU events for FUJITSU-MONAKA

Hi, James
Thank you for your comment.

> On 27/02/2025 5:40 am, Yoshihiro Furudera wrote:
> > The following events are not counted properly:
> >
> > 0x0037 LL_CACHE_MISS_RD
> > 0x400B L3D_CACHE_LMISS_RD
> 
> These two are discoverable so will still appear in
> /sys/bus/event_source/devices/armv8_pmuv3_0/events/ if the hardware says
> they exist. It might be better to change the json strings of these two to warn that
> they don't work if that's the case, otherwise Perf will still list them and you'll be
> worse off.

I will leave these 2 events and
add a warning message to the description in the JSON file.
I will handle other events in the same way as these 2 events.

> 
> > 0x0396 L2D_CACHE_REFILL_L3D_MISS
> > 0x039A L2D_CACHE_REFILL_L3D_MISS_PRF
> > 0x039B L2D_CACHE_REFILL_L3D_MISS_HWPRF 0x039C
> L2D_CACHE_REFILL_L3D_HIT
> > 0x03A0 L2D_CACHE_REFILL_L3D_HIT_PRF
> > 0x03A1 L2D_CACHE_REFILL_L3D_HIT_HWPRF
> >

Best Regards,
Yoshihiro Furudera