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Date: Thu, 1 Feb 2018 10:11:37 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
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Subject: Re: [PATCH 4/4] sched/fair: Use a recently used CPU as an idle
 candidate and the basis for SIS
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On Wed, Jan 31, 2018 at 09:44:18AM -0800, Srinivas Pandruvada wrote:

> Much more throttling required compared to PERF_CTL. MSR_HWP_REQUEST is
> much slower compared to PERF_CTL (as high as 10:1). 

Still much better than what other architectures have to deal with ;-)