Messages in this thread |  | | Date | Thu, 28 Nov 2013 13:35:20 +0100 | Subject | Re: [PATCH v7 3/4] perf,x86: add Intel RAPL PMU support | From | Stephane Eranian <> |
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On Thu, Nov 28, 2013 at 1:26 PM, Ingo Molnar <mingo@kernel.org> wrote: > > * Vince Weaver <vince@deater.net> wrote: > >> On Wed, 27 Nov 2013, Stephane Eranian wrote: >> >> > On Wed, Nov 27, 2013 at 7:35 PM, Vince Weaver <vince@deater.net> wrote: >> >> > > So I notice PP1 (which is the GPU power on non-server chips) >> > > is not supported. >> > > >> > > Is that just for simplicity? >> > > >> > Does it work on specific models only? I bet so. How to detect those? >> >> In general it is on the machines that don't support the DRAM measurements >> (so the non-EP machines) but I don't know if there's a nice list anywhere. >> >> Intel manuals say: >> For a client platform, PP1 domain refers to the power plane of a >> specific device in the uncore. For server platforms, PP1 domain is not >> supported, >> >> usually PP1 I think maps to the embedded GPU. > > It would indeed be nice to expose PP1 too via the same facility - > Haswell and later spends some 40% of the CPU die on the integrated GPU > and people end up using it. > My worry is to determine if the GPU is actually enabled or even present. Using the x86_model may not be enough for that.
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