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From: Leo Yan <leo.yan@linaro.org>
To: German Gomez <german.gomez@arm.com>
Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
	John Garry <john.garry@huawei.com>, Will Deacon <will@kernel.org>,
	Mathieu Poirier <mathieu.poirier@linaro.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	Mike Leach <mike.leach@linaro.org>,
	linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org
Subject: Re: [PATCH 4/5] perf arm-spe: Implement find_snapshot callback
Date: Wed, 6 Oct 2021 17:51:24 +0800	[thread overview]
Message-ID: <20211006095124.GC14400@leoy-ThinkPad-X240s> (raw)
In-Reply-To: <6b092f13-832f-5d1d-a504-aea96c81bf17@arm.com>

On Wed, Oct 06, 2021 at 10:35:20AM +0100, German Gomez wrote:

[...]

> > So simply say, I think the head pointer monotonically increasing is
> > the right thing to do in Arm SPE driver.
> 
> I will talk to James about how we can proceed on this.

Thanks!

> >> (note that the patch will skip the wrap-around detection if this is the
> >> case,
> >> in order to handle both cases in the userspace perf tool).
> > Almost agree, I read multiple times but have no idea what's the
> > "both cases" in the last sentence.
> 
> Apologies for the later part was not clear. What I meant to say was that
> in the original patch for cs-etm, it seemed to handle both cases where
> AUX head might be monotonically and non-monotonically increasing, so we
> applied the same for the Arm SPE patch.

No worries, thanks for explanation.

Leo

  reply	other threads:[~2021-10-06  9:51 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-16 15:46 [PATCH 1/5] perf cs-etm: Print size using consistent format German Gomez
2021-09-16 15:46 ` [PATCH 2/5] perf arm-spe: " German Gomez
2021-09-23 13:35   ` Leo Yan
2021-09-16 15:46 ` [PATCH 3/5] perf arm-spe: Add snapshot mode support German Gomez
2021-10-20 12:48   ` Leo Yan
2021-09-16 15:46 ` [PATCH 4/5] perf arm-spe: Implement find_snapshot callback German Gomez
2021-09-23 13:50   ` Leo Yan
2021-09-23 14:40     ` Leo Yan
2021-09-30 12:26       ` German Gomez
2021-10-04 12:27         ` Leo Yan
2021-10-06  9:35           ` German Gomez
2021-10-06  9:51             ` Leo Yan [this message]
2021-10-11 15:55               ` German Gomez
2021-10-12  8:19                 ` Will Deacon
2021-10-12  8:47                   ` James Clark
2021-10-13  0:39                 ` Leo Yan
2021-10-13  7:51                   ` Will Deacon
2021-10-15 12:33                     ` German Gomez
2021-10-15 14:16                       ` Leo Yan
2021-10-15 14:41                         ` German Gomez
2021-10-17  6:13                       ` Leo Yan
2021-10-19  9:23                         ` German Gomez
2021-10-19 13:12                           ` Leo Yan
2021-11-02 11:02                         ` German Gomez
2021-10-17 12:05   ` Leo Yan
2021-10-17 12:36     ` Leo Yan
2021-10-19 17:34     ` German Gomez
2021-10-20 13:25       ` Leo Yan
2021-09-16 15:46 ` [PATCH 5/5] perf arm-spe: Snapshot mode test German Gomez
2021-10-20 13:13   ` Leo Yan
2021-10-20 15:06     ` German Gomez
2021-11-02 14:07     ` James Clark
2021-11-02 15:37       ` James Clark
2021-11-09 13:26         ` German Gomez
2021-09-23 13:35 ` [PATCH 1/5] perf cs-etm: Print size using consistent format Leo Yan
2021-09-23 16:24 ` Mathieu Poirier
2021-09-30 12:09   ` German Gomez
2021-09-30 16:30     ` Mathieu Poirier

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