On Wed, 2015-12-02 at 14:12 +0530, Anshuman Khandual wrote:

On 10/29/2015 06:13 AM, Anton Blanchard wrote:

quoted

Here are various improvements to our context switch path. Some of
the
highlights:
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- Group all mfsprs and mtsprs in __switch_to(), which gives us a
  10% improvement on POWER8.
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- Create giveup_all() and flush_all_to_thread() so we only write
the
  MSR once, which gives us a 3% improvement on POWER8.
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- 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.
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- Make giveup_vsx() and flush_vsx_to_thread() handle FP and Altivec
  state, so they behave more like their sister functions.
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Scott: There are changes to the SPE code here which I have only
been
able to compile test.

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Hey Anton,
=20
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-improv=
ements/20151029-092229

Mikey