Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Wed, 16 May 2018 17:54:24 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc:     tglx@linutronix.de, mingo@redhat.com, bp@suse.de, lenb@kernel.org,
        rjw@rjwysocki.net, mgorman@techsingularity.net, x86@kernel.org,
        linux-pm@vger.kernel.org, viresh.kumar@linaro.org,
        juri.lelli@arm.com, linux-kernel@vger.kernel.org
Subject: Re: [RFC/RFT] [PATCH 10/10] cpufreq: intel_pstate: enable boost for
 SKX
Message-ID: <20180516155424.GG12198@hirez.programming.kicks-ass.net>
References: <20180516044911.28797-1-srinivas.pandruvada@linux.intel.com>
 <20180516044911.28797-11-srinivas.pandruvada@linux.intel.com>
 <20180516074948.GZ12217@hirez.programming.kicks-ass.net>
 <1526485584.61700.19.camel@linux.intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1526485584.61700.19.camel@linux.intel.com>
User-Agent: Mutt/1.9.5 (2018-04-13)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Wed, May 16, 2018 at 08:46:24AM -0700, Srinivas Pandruvada wrote:
> On Wed, 2018-05-16 at 09:49 +0200, Peter Zijlstra wrote:
> > On Tue, May 15, 2018 at 09:49:11PM -0700, Srinivas Pandruvada wrote:
> > > Enable HWP boost on Skylake server platform.
> > 
> > Why not unconditionally enable it on everything HWP ?
> Never noticed in any difference performance in clients with HWP nor
> anybody complained. Since clients uses single power domain, some other
> CPUs always gives boost. 

Can't the hardware tell us about per-core stuff? Do we really have to
use tables for that?