From: Will Deacon <will@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Adrian Hunter <adrian.hunter@intel.com>,
James Clark <james.clark@linaro.org>,
Mike Leach <mike.leach@arm.com>, Tamas Petz <tamas.petz@arm.com>,
Tamas Zsoldos <tamas.zsoldos@arm.com>, Leo Yan <leo.yan@arm.com>
Cc: catalin.marinas@arm.com, kernel-team@android.com,
Will Deacon <will@kernel.org>,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org
Subject: Re: [PATCH 0/3] perf: Suppress redundant ITRACE start records for Arm SPE and CoreSight
Date: Sun, 4 Oct 2026 23:09:16 +0100 [thread overview]
Message-ID: <179113376395.1496517.2313914567669442516.b4-ty@kernel.org> (raw)
In-Reply-To: <20260901-perf_suppress_itrace_start_records-v1-0-c4fbc6860859@arm.com>
On Tue, 01 Sep 2026 17:36:14 +0100, Leo Yan wrote:
> Thanks to Tamas Petz for noticing that Arm CoreSight perf data can contain
> many PERF_RECORD_ITRACE_START records.
>
> PERF_RECORD_ITRACE_START provides the decoder with the initial thread
> context when that information is absent from the trace stream. Once
> tracing has started, Arm SPE and CoreSight decoders track subsequent
> context changes using context packets or recorded sched_switch events.
>
> [...]
Applied to arm64 (for-next/perf), thanks!
[1/3] perf/core: Export perf_event_itrace_started()
https://git.kernel.org/arm64/c/ce512db53e0d
[2/3] perf: arm_spe: Suppress redundant ITRACE start records
https://git.kernel.org/arm64/c/87f78017e8c8
[3/3] coresight: perf: Suppress ITRACE start records
https://git.kernel.org/arm64/c/8f8301eaa400
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
prev parent reply other threads:[~2026-10-04 22:09 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-01 16:36 [PATCH 0/3] perf: Suppress redundant ITRACE start records for Arm SPE and CoreSight Leo Yan
2026-09-01 16:36 ` [PATCH 1/3] perf/core: Export perf_event_itrace_started() Leo Yan
2026-09-28 8:34 ` Leo Yan
2026-09-28 11:35 ` Peter Zijlstra
2026-09-01 16:36 ` [PATCH 2/3] perf: arm_spe: Suppress redundant ITRACE start records Leo Yan
2026-09-01 16:36 ` [PATCH 3/3] coresight: perf: Suppress " Leo Yan
2026-09-28 9:41 ` [PATCH 0/3] perf: Suppress redundant ITRACE start records for Arm SPE and CoreSight James Clark
2026-10-04 22:09 ` Will Deacon [this message]
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