[Pixman] [PATCH 07/12] vmx: implement fast path vmx_composite_over_n_8_8888

[Siarhei Siamashka]

On Tue, 14 Jul 2015 11:41:40 +0300
Siarhei Siamashka <siarhei.siamashka at gmail.com> wrote:

> On Thu,  2 Jul 2015 13:04:12 +0300
> Oded Gabbay <oded.gabbay at gmail.com> wrote:
> 
> > POWER8, 8 cores, 3.4GHz, RHEL 7.1 ppc64le.
> > 
> > reference memcpy speed = 24764.8MB/s (6191.2MP/s for 32bpp fills)
> > 
> >                 Before           After           Change
> >               ---------------------------------------------
> > L1              90.21           133.21           +47.67%
> > L2              94.91           132.95           +40.08%
> > M               95.49           132.53           +38.79%
> > HT              88.07           100.43           +14.03%
> > VT              86.65           112.45           +29.77%
> > R               82.77           96.25            +16.29%
> > RT              65.64           55.14            -16.00%
> > Kops/s          673             580              -13.82%
> > 
> > cairo trimmed benchmarks :
> > 
> > Speedups
> > ========
> > t-firefox-asteroids     533.92  -> 495.51  :  1.08x
> > 
> > Slowdowns
> > =========
> > t-poppler               364.99  -> 393.72  :  1.08x
> > t-firefox-canvas-alpha  984.55  -> 1197.85 :  1.22x
> > 
> > Signed-off-by: Oded Gabbay <oded.gabbay at gmail.com>
> 
> Acked-by: Siarhei Siamashka <siarhei.siamashka at gmail.com>

In fact, I'm taking this back for now.

First it would be a good idea to check what's wrong with these
slowdowns.

-- 
Best regards,
Siarhei Siamashka