From: Peter Zijlstra <peterz@infradead.org>
To: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Michael Petlan <mpetlan@redhat.com>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Ian Rogers <irogers@google.com>,
Dapeng Mi <dapeng1.mi@linux.intel.com>,
James Clark <james.clark@linaro.org>,
Sadasivan Shaiju <sadasivan.shaiju2@amd.com>,
x86@kernel.org, linux-perf-users@vger.kernel.org,
linux-kernel@vger.kernel.org,
Manali Shukla <manali.shukla@amd.com>,
Santosh Shukla <santosh.shukla@amd.com>,
Ananth Narayan <ananth.narayan@amd.com>,
Sandipan Das <sandipan.das@amd.com>
Subject: Re: [PATCH v2 1/5] perf/amd/ibs: Account interrupt for discarded samples
Date: Thu, 26 Feb 2026 14:06:00 +0100 [thread overview]
Message-ID: <20260226130600.GB606826@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <c9771902-39da-430f-ab2b-ba953d9ba79e@amd.com>
On Tue, Feb 24, 2026 at 01:41:54PM +0530, Ravi Bangoria wrote:
> Hi Michael,
>
> >> Add interrupt throttling accounting for below cases:
> >>
> >> o IBS Op PMU: A software filter (in addition to the hardware filter)
> >> drops samples whose load latency is below the user-specified
> >> threshold.
> >>
> >> o IBS Fetch PMU: Samples discarded due to the zero-RIP erratum (#1197).
> >>
> >> Although these samples are discarded, the NMI cost is still incurred, so
> >> they should be counted for interrupt throttling.
> >>
> >
> > Maybe worth tagging
> >
> > Fixes: 26db2e0c51fe83e1dd852c1321407835b481806e ("perf/x86/amd/ibs: Work around erratum #1197")
> > Fixes: d20610c19b4a22bc69085b7eb7a02741d51de30e ("perf/amd/ibs: Add support for OP Load Latency Filtering")
>
> Yes, makes sense.
>
> Ingo / Peter, Please let me know if you want me to respin.
I've added them. Thanks!
next prev parent reply other threads:[~2026-02-26 13:06 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-16 4:22 [PATCH v2 0/5] perf/amd/ibs: Assorted fixes Ravi Bangoria
2026-02-16 4:22 ` [PATCH v2 1/5] perf/amd/ibs: Account interrupt for discarded samples Ravi Bangoria
2026-02-23 12:25 ` Michael Petlan
2026-02-24 8:11 ` Ravi Bangoria
2026-02-26 13:06 ` Peter Zijlstra [this message]
2026-02-28 10:56 ` [tip: perf/core] " tip-bot2 for Ravi Bangoria
2026-02-16 4:22 ` [PATCH v2 2/5] perf/amd/ibs: Limit ldlat->l3missonly dependency to Zen5 Ravi Bangoria
2026-02-28 10:56 ` [tip: perf/core] " tip-bot2 for Ravi Bangoria
2026-02-16 4:22 ` [PATCH v2 3/5] perf/amd/ibs: Preserve PhyAddrVal bit when clearing PhyAddr MSR Ravi Bangoria
2026-02-28 10:56 ` [tip: perf/core] " tip-bot2 for Ravi Bangoria
2026-02-16 4:22 ` [PATCH v2 4/5] perf/amd/ibs: Avoid calling perf_allow_kernel() from the IBS NMI handler Ravi Bangoria
2026-02-28 10:56 ` [tip: perf/core] " tip-bot2 for Ravi Bangoria
2026-03-06 21:13 ` [PATCH v2 4/5] " Michael Petlan
2026-03-09 9:07 ` Michael Petlan
2026-03-09 11:40 ` Ravi Bangoria
2026-03-09 19:06 ` Michael Petlan
2026-03-10 16:46 ` Ravi Bangoria
2026-02-16 4:22 ` [PATCH v2 5/5] perf/amd/ibs: Avoid race between event add and NMI Ravi Bangoria
2026-02-28 10:56 ` [tip: perf/core] " tip-bot2 for Ravi Bangoria
2026-02-18 5:51 ` [PATCH v2 0/5] perf/amd/ibs: Assorted fixes Namhyung Kim
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