linux-kernel - Re: [Patch v3 10/22] perf/x86/intel: Process arch-PEBS records or record fragments

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Message-ID: <20250415135700.GD4031@noisy.programming.kicks-ass.net>
Date: Tue, 15 Apr 2025 15:57:00 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Dapeng Mi <dapeng1.mi@...ux.intel.com>
Cc: Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>, Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Kan Liang <kan.liang@...ux.intel.com>,
	Andi Kleen <ak@...ux.intel.com>,
	Eranian Stephane <eranian@...gle.com>, linux-kernel@...r.kernel.org,
	linux-perf-users@...r.kernel.org, Dapeng Mi <dapeng1.mi@...el.com>
Subject: Re: [Patch v3 10/22] perf/x86/intel: Process arch-PEBS records or
 record fragments

On Tue, Apr 15, 2025 at 11:44:16AM +0000, Dapeng Mi wrote:
> A significant difference with adaptive PEBS is that arch-PEBS record
> supports fragments which means an arch-PEBS record could be split into
> several independent fragments which have its own arch-PEBS header in
> each fragment.

With the constraint that all fragments for a single event are
contiguous, right?