Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous systems

From	Juri Lelli <juri.lelli@arm.com>
Newsgroups	linux.kernel
Subject	Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous systems
Date	2016-01-20 11:30 +0100
Message-ID	<qSYbv-51L-1@gated-at.bofh.it> (permalink)
References	(5 earlier) <qSCkG-6VX-9@gated-at.bofh.it> <qSCE2-730-13@gated-at.bofh.it> <qSFsf-Eb-49@gated-at.bofh.it> <qSKrT-3Uv-5@gated-at.bofh.it> <qSLR0-4Xv-3@gated-at.bofh.it>
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On 19/01/16 21:10, Mark Brown wrote:
> On Tue, Jan 19, 2016 at 11:48:15AM -0800, Steve Muckle wrote:
> > On 01/19/2016 06:29 AM, Juri Lelli wrote:
> 
> > > I'm generally seeing ~1sec increase in boot time for 1 and practically
> > > no difference for 2 (even after having added patches that provide
> > > runtime performance improvements).
> 
> > One second is considerable IMO. Aside from the general desire to have
> > shorter boot times on any platform there are environments like
> > automotive where boot time is critical.
> 
> Yeah, definitely.  Is this actually blocking boot and if so can we
> arrange to do this in parallel with other activity (with likely knock on
> effects on reproducibility...)?

No, this goes in parallel. That's also showed by the fact that the
benchmarking thing itself usually takes more that 1 sec, but it seems to
impact for that amount of time only.

Thread

Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous  systems Steve Muckle <steve.muckle@linaro.org> - 2016-01-15 21:00 +0100
  Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous  systems Juri Lelli <juri.lelli@arm.com> - 2016-01-18 16:20 +0100
    Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous systems Vincent Guittot <vincent.guittot@linaro.org> - 2016-01-18 17:20 +0100
      Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous  systems Juri Lelli <juri.lelli@arm.com> - 2016-01-18 17:40 +0100
        Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous systems Vincent Guittot <vincent.guittot@linaro.org> - 2016-01-18 17:50 +0100
          Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous  systems Juri Lelli <juri.lelli@arm.com> - 2016-01-18 18:10 +0100
            Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous systems Vincent Guittot <vincent.guittot@linaro.org> - 2016-01-18 18:30 +0100
          Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous  systems Catalin Marinas <catalin.marinas@arm.com> - 2016-01-19 12:10 +0100
            Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous  systems Juri Lelli <juri.lelli@arm.com> - 2016-01-19 12:30 +0100
              Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous  systems Juri Lelli <juri.lelli@arm.com> - 2016-01-19 15:30 +0100
                Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous  systems Steve Muckle <steve.muckle@linaro.org> - 2016-01-19 20:50 +0100
                Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous  systems Mark Brown <broonie@kernel.org> - 2016-01-19 22:20 +0100
                Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous  systems Juri Lelli <juri.lelli@arm.com> - 2016-01-20 11:30 +0100
    Re: [RFC PATCH v2 0/4] CPUs capacity information for heterogeneous  systems Steve Muckle <steve.muckle@linaro.org> - 2016-01-18 20:30 +0100

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