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Re: [PATCH] Do not modify MSR_IA32_ENERGY_PERF_BIAS in kernel

From Len Brown <lenb@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCH] Do not modify MSR_IA32_ENERGY_PERF_BIAS in kernel
Date 2016-03-08 02:00 +0100
Message-ID <raeaf-1Ul-19@gated-at.bofh.it> (permalink)
References <r6tAT-640-39@gated-at.bofh.it> <r7Rrs-A3-7@gated-at.bofh.it> <r82PU-8co-11@gated-at.bofh.it> <r8Trb-3ZI-3@gated-at.bofh.it> <r8XuO-6XQ-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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> But with Broadwell-EP processor (E5-2687W v4) the CPU will not enter turbo modes
> if this value is not set to performance

BDX-EP supports HWP.
Are these failing machines running in HWP mode?

(On BDX-EP, and only on BDX-EP, EPB acts to set the BIAS for HWP,
 because that processor doesn't yet have EPP.)

-- 
Len Brown, Intel Open Source Technology Center

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Thread

Re: [PATCH] Do not modify MSR_IA32_ENERGY_PERF_BIAS in kernel "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-04 14:00 +0100
  [PATCH] Do not modify perf bias performance setting by default at boot Thomas Renninger <trenn@suse.de> - 2016-03-07 14:30 +0100
    Re: [PATCH] Do not modify perf bias performance setting by default at boot Thomas Renninger <trenn@suse.de> - 2016-03-07 17:20 +0100
  Re: [PATCH] Do not modify MSR_IA32_ENERGY_PERF_BIAS in kernel Len Brown <lenb@kernel.org> - 2016-03-08 02:00 +0100
    Re: [PATCH] Do not modify MSR_IA32_ENERGY_PERF_BIAS in kernel Thomas Renninger <trenn@suse.de> - 2016-03-08 13:20 +0100
      Re: [PATCH] Do not modify MSR_IA32_ENERGY_PERF_BIAS in kernel Len Brown <lenb@kernel.org> - 2016-03-08 22:10 +0100

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