[Intel-gfx] sna: Experimental support for write-combining mmaps (wc-mmap)

[Chris Wilson]

On Fri, Nov 07, 2014 at 01:00:32PM +0100, Sedat Dilek wrote:
> Here some numbers...
> 
> $ diff -uprN benchmarks/x11perf-aa10text_no-wcmmap.txt
> benchmarks/x11perf-aa10text_wcmmap.txt
> --- benchmarks/x11perf-aa10text_no-wcmmap.txt   2014-11-07
> 12:57:49.932264840 +0100
> +++ benchmarks/x11perf-aa10text_wcmmap.txt      2014-11-07
> 12:53:17.028273399 +0100
> @@ -2,16 +2,16 @@ $ x11perf -aa10text
>  x11perf - X11 performance program, version 1.2
>  The X.Org Foundation server version 11501000 on :0
>  from fambox
> -Fri Nov  7 12:56:29 2014
> +Fri Nov  7 12:51:37 2014
> 
> -Sync time adjustment is 0.0814 msecs.
> +Sync time adjustment is 0.0817 msecs.
> 
> -24000000 reps @   0.0002 msec (4420000.0/sec): Char in 80-char aa
> line (Charter 10)
> -24000000 reps @   0.0002 msec (4420000.0/sec): Char in 80-char aa
> line (Charter 10)
> -24000000 reps @   0.0002 msec (4380000.0/sec): Char in 80-char aa
> line (Charter 10)
> -24000000 reps @   0.0002 msec (4410000.0/sec): Char in 80-char aa
> line (Charter 10)
> -24000000 reps @   0.0002 msec (4410000.0/sec): Char in 80-char aa
> line (Charter 10)
> -120000000 trep @   0.0002 msec (4410000.0/sec): Char in 80-char aa
> line (Charter 10)
> +24000000 reps @   0.0002 msec (4490000.0/sec): Char in 80-char aa
> line (Charter 10)
> +24000000 reps @   0.0002 msec (4490000.0/sec): Char in 80-char aa
> line (Charter 10)
> +24000000 reps @   0.0002 msec (4480000.0/sec): Char in 80-char aa
> line (Charter 10)
> +24000000 reps @   0.0002 msec (4490000.0/sec): Char in 80-char aa
> line (Charter 10)
> +24000000 reps @   0.0002 msec (4490000.0/sec): Char in 80-char aa
> line (Charter 10)
> +120000000 trep @   0.0002 msec (4490000.0/sec): Char in 80-char aa
> line (Charter 10)

Hmm, what hw is that? As 4M is a bit on the low side.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre