[Cbe-oss-dev] ps3vram performance

[Ken Werner]

On Wednesday 14 October 2009 06:51:02 pm Geoff Levand wrote:
> On 10/14/2009 02:01 AM, Siarhei Siamashka wrote:
> > On Wednesday 14 October 2009, Geoff Levand wrote:
> >> > On Wednesday 23 September 2009, Ken Werner wrote:
> >> >> It looks like the firmware from 2.7.6 to 3.0.1 update has no impact
> >> >> but the kernel version does.
> >>
> >> Just FYI, I have a kernel fix that I hope to release this week.  I need
> >> to do some more work to verify it before I release it though.
> >
> > OK, nice. Let me know if you need some external testing.
> 
> I pushed out the fix to ps3-linux.git.  Please test and report.
> 
>  
>  http://git.kernel.org/?p=linux/kernel/git/geoff/ps3-linux-patches.git;a=bl
> ob;f=ps3-wip/ps3-vram-speedup.patch;hb=HEAD
> 
> -Geoff

I tested the patch on the 40GB Model (CECHG04) with FW 3.0.1. The results look 
way better than before - thanks.

# Kernel 2.6.31-rc7 plus ps3-vram-speedup.patch
# dd if=/dev/zero of=/dev/ps3vram  count=229 bs=1M oflag=direct
229+0 records in
229+0 records out
240123904 bytes (240 MB) copied, 0.999395 s, 240 MB/s
# dd if=/dev/ps3vram of=/dev/null bs=1M iflag=direct
245+0 records in
245+0 records out
256901120 bytes (257 MB) copied, 0.68611 s, 374 MB/s

# Kernel 2.6.31.4 plus ps3-vram-speedup.patch
# dd if=/dev/zero of=/dev/ps3vram  count=229 bs=1M oflag=direct
229+0 records in
229+0 records out
240123904 bytes (240 MB) copied, 1.00275 s, 239 MB/s
# dd if=/dev/ps3vram of=/dev/null bs=1M iflag=direct
245+0 records in
245+0 records out
256901120 bytes (257 MB) copied, 0.683439 s, 376 MB/s


-ken