From: sashiko-bot@kernel.org
To: "Matt Turner" <mattst88@gmail.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: [PATCH v5 06/11] alpha/perf: attach ProfileMe status as PERF_SAMPLE_RAW data
Date: Tue, 03 Nov 2026 20:43:14 +0000 [thread overview]
Message-ID: <sashiko-outbox-196005@kernel.org> (raw)
In-Reply-To: <20261103-alpha-profileme-v5-6-bbe3937fbf3a@gmail.com>
> A ProfileMe sample's PC alone does not say what happened to the profiled
> instruction. I_STAT and PCTR_CTL do: whether it trapped and why, was
> mispredicted, stalled, or was killed on a wrong path, and what PCTR1
> counted during the window.
>
> With PERF_SAMPLE_RAW, attach PMPC, I_STAT and PCTR_CTL to each ProfileMe
> sample in a versioned struct alpha_profileme_sample. PMPC is included
> because a PALmode PMPC is not the sample's IP. Killed instructions can be
> told apart by PM_KILLED_BM and VAL. The 64-bit fields are packed after
> the 32-bit version, since the payload follows the 32-bit raw size in the
> sample record: they are then 8-byte aligned in the record, which needs
> no padding.
>
> Signed-off-by: Matt Turner <mattst88@gmail.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261103-alpha-profileme-v5-0-bbe3937fbf3a@gmail.com?part=6
next prev parent reply other threads:[~2026-11-03 20:43 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-03 20:37 [PATCH v5 00/11] alpha/perf: add ProfileMe sampling Matt Turner
2026-11-03 20:37 ` [PATCH v5 01/11] alpha/perf: pass PERFMON_CMD_LOGGING_ALL to the logging options call Matt Turner
2026-11-03 20:40 ` sashiko-bot
2026-11-03 20:37 ` [PATCH v5 02/11] alpha/perf: add sysfs format and event attributes Matt Turner
2026-11-03 20:40 ` sashiko-bot
2026-11-03 20:37 ` [PATCH v5 03/11] alpha/perf: clear PERF_HES_UPTODATE when an event starts counting Matt Turner
2026-11-03 20:43 ` sashiko-bot
2026-11-03 20:37 ` [PATCH v5 04/11] alpha/perf: do not report user registers from the entry code Matt Turner
2026-11-03 20:46 ` sashiko-bot
2026-11-03 20:37 ` [PATCH v5 05/11] alpha/perf: implement ProfileMe sampling Matt Turner
2026-11-03 21:00 ` sashiko-bot
2026-11-03 20:37 ` [PATCH v5 06/11] alpha/perf: attach ProfileMe status as PERF_SAMPLE_RAW data Matt Turner
2026-11-03 20:43 ` sashiko-bot [this message]
2026-11-03 20:37 ` [PATCH v5 07/11] alpha/perf: optionally randomize the ProfileMe sampling interval Matt Turner
2026-11-03 20:45 ` sashiko-bot
2026-11-03 20:37 ` [PATCH v5 08/11] alpha/perf: report the ProfileMe window count as the sample weight Matt Turner
2026-11-03 20:41 ` sashiko-bot
2026-11-03 20:37 ` [PATCH v5 09/11] alpha/perf: report the data source of ProfileMe DTB misses Matt Turner
2026-11-03 20:48 ` sashiko-bot
2026-11-03 20:37 ` [PATCH v5 10/11] alpha/perf: add ProfileMe sample filters Matt Turner
2026-11-03 20:43 ` sashiko-bot
2026-11-03 20:37 ` [PATCH v5 11/11] alpha/perf: sample only retired instructions for precise events Matt Turner
2026-11-03 20:48 ` sashiko-bot
2026-11-03 23:42 ` [PATCH v5 00/11] alpha/perf: add ProfileMe sampling Ian Rogers
2026-11-04 9:01 ` Magnus Lindholm
2026-11-04 18:54 ` Matt Turner
2026-11-04 18:53 ` Matt Turner
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