From: Giovanni Gherdovich <ggherdovich@suse.cz>
To: Peter Zijlstra <peterz@infradead.org>
Cc: srinivas.pandruvada@linux.intel.com, tglx@linutronix.de,
mingo@redhat.com, bp@suse.de, lenb@kernel.org, rjw@rjwysocki.net,
x86@kernel.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org, mgorman@techsingularity.net,
matt@codeblueprint.co.uk, viresh.kumar@linaro.org,
juri.lelli@redhat.com, pjt@google.com,
vincent.guittot@linaro.org, qperret@qperret.net,
dietmar.eggemann@arm.com
Subject: Re: [PATCH 1/2] x86,sched: Add support for frequency invariance
Date: Wed, 02 Oct 2019 14:26:44 +0200 [thread overview]
Message-ID: <1570019204.22393.1.camel@suse.cz> (raw)
In-Reply-To: <20190924160423.GN2369@hirez.programming.kicks-ass.net>
On Tue, 2019-09-24 at 18:04 +0200, Peter Zijlstra wrote:
> On Mon, Sep 09, 2019 at 04:42:15AM +0200, Giovanni Gherdovich wrote:
>
> > +static void intel_set_cpu_max_freq(void)
> > +{
> > + /*
> > + * TODO: add support for:
> > + *
> > + * - Xeon Phi (KNM, KNL)
> > + * - Xeon Gold/Platinum, Atom Goldmont/Goldmont Plus
> > + * - Atom Silvermont
>
> ISTR I had code for Atom.. what happened with that?
I'm being overly zealous and I wanted to get a Silvermont machine to test that
code before sending.
The reason is that your code uses MSR_ATOM_CORE_RATIOS and
MSR_ATOM_CORE_TURBO_RATIOS which are not documented in the SDM. I wanted to
make sure those have the expected content on at least one machine before using
them in my code. I have no doubt you, Srinivas and Len (who uses them in
turbostat) have already checked but you know, more eyeballs.
I've talked to Len and Srinivas at LPC, they agreed that those two MSR may not
have made it to the SDM but said the turbostat source code is the reference in
this case.
Giovanni
next prev parent reply other threads:[~2019-10-02 12:21 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-09 2:42 [PATCH 0/2] Add support for frequency invariance for (some) x86 Giovanni Gherdovich
2019-09-09 2:42 ` [PATCH 1/2] x86,sched: Add support for frequency invariance Giovanni Gherdovich
2019-09-11 15:28 ` Doug Smythies
2019-09-13 20:58 ` Doug Smythies
2019-09-17 14:25 ` Giovanni Gherdovich
2019-09-19 14:42 ` Doug Smythies
2019-09-24 8:06 ` Mel Gorman
2019-09-24 17:52 ` Doug Smythies
2019-09-13 22:52 ` Srinivas Pandruvada
2019-09-17 14:27 ` Giovanni Gherdovich
2019-09-17 15:55 ` Vincent Guittot
2019-09-19 23:55 ` Srinivas Pandruvada
2019-09-14 10:57 ` Quentin Perret
2019-09-17 14:27 ` Giovanni Gherdovich
2019-09-17 14:39 ` Quentin Perret
2019-09-24 14:03 ` Peter Zijlstra
2019-09-24 16:00 ` Peter Zijlstra
2019-10-02 12:27 ` Giovanni Gherdovich
2019-10-02 18:45 ` Peter Zijlstra
2019-09-24 16:04 ` Peter Zijlstra
2019-10-02 12:26 ` Giovanni Gherdovich [this message]
2019-10-02 18:35 ` Peter Zijlstra
2019-09-24 16:30 ` Peter Zijlstra
2019-10-02 12:25 ` Giovanni Gherdovich
2019-10-02 18:47 ` Peter Zijlstra
2019-09-09 2:42 ` [PATCH 2/2] cpufreq: intel_pstate: Conditional frequency invariant accounting Giovanni Gherdovich
2019-09-24 16:01 ` [PATCH 0/2] Add support for frequency invariance for (some) x86 Peter Zijlstra
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