On Wed, 2015-12-02 at 14:12 +0530, Anshuman Khandual wrote:
> On 10/29/2015 06:13 AM, Anton Blanchard wrote:
> > Here are various improvements to our context switch path. Some of
> > the
> > highlights:
> >
> > - Group all mfsprs and mtsprs in __switch_to(), which gives us a
> > 10% improvement on POWER8.
> >
> > - Create giveup_all() and flush_all_to_thread() so we only write
> > the
> > MSR once, which gives us a 3% improvement on POWER8.
> >
> > - Create disable_kernel_{fp,altivec,vsx,spe}() and add a debug boot
> > option (ppc_strict_facility_enable) to minimise kernel code
> > running
> > with floating point and vector bits enabled.
> >
> > - Make giveup_vsx() and flush_vsx_to_thread() handle FP and Altivec
> > state, so they behave more like their sister functions.
> >
> > Scott: There are changes to the SPE code here which I have only
> > been
> > able to compile test.
>
> Hey Anton,
>
> Wondering if you have a git tree hosted some where to pull these
> patches ?
The 0day bot does this automatically for you...
https://github.com/0day-ci/linux/tree/Anton-Blanchard/Context-switch-improvements/20151029-092229
Mikey
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