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Tue, 20 Oct 2026 13:38:53 -0700 (PDT) Received: from ehlo.thunderbird.net ([2804:2bf0:60e7:ae00:617a:6625:1f37:5d9f]) by smtp.gmail.com with ESMTPSA id ada2fe7eead31-7cc92428d7asm405406137.10.2026.10.20.13.38.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 20 Oct 2026 13:38:53 -0700 (PDT) Date: Tue, 20 Oct 2026 17:38:48 -0300 From: Arnaldo Melo To: Ian Rogers , Arnaldo Carvalho de Melo CC: James Clark , Besar Wicaksono , namhyung@kernel.org, linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, vsethi@nvidia.com, rwiley@nvidia.com, skelley@nvidia.com, mochs@nvidia.com, rajjoshi@nvidia.com, treding@nvidia.com, jonathanh@nvidia.com, john.garry@linux.dev, will@kernel.org, mike.leach@arm.com, leo.yan@linux.dev, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, adrian.hunter@intel.com, ctshao@google.com Subject: =?US-ASCII?Q?Re=3A_=5BPATCH_0/6=5D_perf_jevents=3A_Add_NVIDI?= =?US-ASCII?Q?A_Tegra410_uncore_PMU_events_and_metrics?= User-Agent: Thunderbird for Android In-Reply-To: References: <20261019164241.403644-1-bwicaksono@nvidia.com> <21f58af0-fa3f-41c5-ab03-216c60fbe2f1@linaro.org> Message-ID: X-Mailing-List: linux-tegra@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On October 20, 2026 5:32:48 PM GMT-03:00, Ian Rogers wrote: >On Tue, Oct 20, 2026 at 12:15=E2=80=AFPM Arnaldo Carvalho de Melo > wrote: >> >> On Mon, Oct 19, 2026 at 06:23:16PM +0100, James Clark wrote: >> > On 19/10/2026 17:42, Besar Wicaksono wrote: >> > > Add event aliases and derived metrics for the NVIDIA Tegra410 uncor= e >> > > PMUs=2E >> >> > Reviewed-by: James Clark >> >> Thanks, applied to perf-tools-next, for v7=2E4=2E > >Hi Arnaldo, > >can we not take these in v7=2E4 as there is unaddressed feedback: >https://lore=2Ekernel=2Eorg/linux-perf-users/CAP-5=3DfWucvdYefDOL3Vn=3DO= =3DYUPEXE+tngDDfPLv-T5i3WkCJVA@mail=2Egmail=2Ecom Sure, will remove until the discussion comes to a conclusion=2E=20 - Arnaldo=20 > >The specific problem is that the NVidia PMUs have adopted a convention >not supported by the perf tool of 'pmu_name__rc_'=2E rc >stands for root complex=2E What ends up happening is that aggregation is >broken as the json is claiming that pmu_name is the PMU's name while >the suffix perf_pmus code thinks pmu_name__rc is the pmu name=2E >They've wrangled support via the json by claiming these are sys >events=2E > >We can either: >1) support a new suffix convention of _rc_ >2) push back and ask the driver writers to name their PMU correctly as >defined in the ABI: >https://web=2Egit=2Ekernel=2Eorg/pub/scm/linux/kernel/git/torvalds/linux= =2Egit/tree/Documentation/ABI/testing/sysfs-bus-event_source-devices > >If we do (1) then it would be nice if the support for that could be >contained in this patch series=2E In any case these events don't belong >in sys=2E > >Thanks, >Ian > >> - Arnaldo - Arnaldo