linux-kernel - Re: [Patch v4 09/13] perf/x86/intel: Setup PEBS data configuration and enable legacy groups

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Message-ID: <72e5e711-9dac-4727-9035-98e1e2a90de4@linux.intel.com>
Date: Mon, 23 Jun 2025 09:20:57 +0800
From: "Mi, Dapeng" <dapeng1.mi@...ux.intel.com>
To: Peter Zijlstra <peterz@...radead.org>
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 v4 09/13] perf/x86/intel: Setup PEBS data configuration
 and enable legacy groups


On 6/21/2025 5:27 PM, Peter Zijlstra wrote:
> On Fri, Jun 20, 2025 at 10:39:05AM +0000, Dapeng Mi wrote:
>> Different with legacy PEBS, arch-PEBS provides per-counter PEBS data
>> configuration by programing MSR IA32_PMC_GPx/FXx_CFG_C MSRs.
>>
>> This patch obtains PEBS data configuration from event attribute and then
>> writes the PEBS data configuration to MSR IA32_PMC_GPx/FXx_CFG_C and
>> enable corresponding PEBS groups.
>>
>> Please notice this patach only enables XMM SIMD regs sampling for
> What's a patach? :-)

Oh, should be "patch". Thanks. 👍