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Re: [PATCH v3 1/8] sched, x86: Add SD_ASYM_PACKING flags to x86 cpu topology for ITMT

From	Tim Chen <tim.c.chen@linux.intel.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v3 1/8] sched, x86: Add SD_ASYM_PACKING flags to x86 cpu topology for ITMT
Date	2016-09-12 23:00 +0200
Message-ID	<sgGuB-b1-17@gated-at.bofh.it> (permalink)
References	<sffZw-3f7-9@gated-at.bofh.it> <sffZx-3f7-51@gated-at.bofh.it> <sfQml-H3-7@gated-at.bofh.it>
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On Sat, 2016-09-10 at 15:10 +0200, Thomas Gleixner wrote:
> On Thu, 8 Sep 2016, Srinivas Pandruvada wrote:
> > 
> > From: Tim Chen <tim.c.chen@linux.intel.com>
> > 
> > We uses ASYM_PACKING feature in the scheduler to move tasks to more
> > capable cpus that can be boosted to higher frequency. This is enabled by
> > Intel Turbo Boost Max Technology 3.0 (ITMT).  We mark the sched domain
> > topology level with SD_ASYM_PACKING flag for such systems to indicate
> > scheduler can use the ASYM_PACKING feature to move load to the
> > more capable cpus.
> Sigh. This changelog does not tell anything about the nature of the patch,
> the rationale for it etc. It's just a meaningless blurb.

Okay, I can add more details about ITMT.  Will also be clearer if
the ITMT patch (patch 5) comes before this one.



> > +}
> > +#else
> > +#define x86_core_flags cpu_core_flags
> > +#define x86_smt_flags cpu_smt_flags
> > +#endif
> No. We first rework the code so that the IMT stuff can be added in a later
> patch easily.

I'll move this patch to come after current patch 5.

Thanks.

Tim

Thread

Re: [PATCH v3 1/8] sched, x86: Add SD_ASYM_PACKING flags to x86 cpu  topology for ITMT Thomas Gleixner <tglx@linutronix.de> - 2016-09-10 15:20 +0200
  Re: [PATCH v3 1/8] sched, x86: Add SD_ASYM_PACKING flags to x86 cpu  topology for ITMT Tim Chen <tim.c.chen@linux.intel.com> - 2016-09-12 23:00 +0200
    Re: [PATCH v3 1/8] sched, x86: Add SD_ASYM_PACKING flags to x86 cpu  topology for ITMT Peter Zijlstra <peterz@infradead.org> - 2016-09-13 09:30 +0200
      Re: [PATCH v3 1/8] sched, x86: Add SD_ASYM_PACKING flags to x86 cpu  topology for ITMT Jiri Olsa <jolsa@redhat.com> - 2016-09-19 11:20 +0200
        Re: [PATCH v3 1/8] sched, x86: Add SD_ASYM_PACKING flags to x86 cpu  topology for ITMT Tim Chen <tim.c.chen@linux.intel.com> - 2016-09-19 18:10 +0200

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