Re: [PATCH v6 1/1] crypto: SHA1 transform x86_64 AVX2

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On Thu, Mar 20, 2014 at 11:24:16PM +0100, Marek Vasut wrote:
> On Thursday, March 20, 2014 at 11:14:00 PM, chandramouli narayanan wrote:
> > This git patch adds x86_64 AVX2 optimization of SHA1
> > transform to crypto support. The patch has been tested with 3.14.0-rc1
> > kernel.
> > 
> > On a Haswell desktop, with turbo disabled and all cpus running
> > at maximum frequency, tcrypt shows AVX2 performance improvement
> > from 3% for 256 bytes update to 16% for 1024 bytes update over
> > AVX implementation.
> > 
> > This patch adds sha1_avx2_transform(), the glue, build and
> > configuration changes needed for AVX2 optimization of
> > SHA1 transform to crypto support.
> > 
> > sha1-ssse3 is one module which adds the necessary optimization
> > support (SSSE3/AVX/AVX2) for the low-level SHA1 transform function.
> > With better optimization support, transform function is overridden
> > as the case may be. In the case of AVX2, due to performance reasons
> > across datablock sizes, the AVX or AVX2 transform function is used
> > at run-time as it suits best. The Makefile change therefore appends
> > the necessary objects to the linkage. Due to this, the patch merely
> > appends AVX2 transform to the existing build mix and Kconfig support
> > and leaves the configuration build support as is.
> > 
> > Signed-off-by: Chandramouli Narayanan <mouli@xxxxxxxxxxxxxxx>
> 
> Very nice, good job. Thank you!
> 
> Reviewed-by: Marek Vasut <marex@xxxxxxx>

Patch applied.  Thanks for reviewing.
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