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

[Oded Gabbay]

On Tue, Jul 14, 2015 at 11:50 AM, Siarhei Siamashka
<siarhei.siamashka at gmail.com> wrote:
> 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

ok, I'll remove this patch for now as I want the series to be
upstreamed. I'll check it offline.

Oded