[Kwintv] Re: kdenonbeta/kwintv3/qtvision/plugins/video/v4l

[Zack Rusin]

On Wednesday 07 January 2004 22:17, George Staikos wrote:
> On Wednesday 07 January 2004 21:52, Zack Rusin wrote:
> > >    You know, the last time I tested I found that XV was faster
> > > than XVSHM. Perhaps it was implementation flaws that have since
> > > been fixed, or perhaps I had a weird X server or weird hardware,
> > > but it could be true that XVSHM isn't all that great.  How does
> > > it perform for you?
> >
> > Most likely it's a MTRR problem. Did you run x11perf --shmput500 to
> > see what results you're getting? Compare them to a normal x11perf
> > --putimg500.  Shm should always perform faster.
>
>   That's not using Xv though.  XSHM is certainly faster than
> PutImage.  Where I saw slower performance was using SHM together with
> Xv (XvShm) vs just using Xv* calls.

Nope, it's testing mtrr though which is in question here. In general 
Mark (Xv author) says that numbers around 150 should be seen with 
supported drivers for XvShm.

Zack

-- 
militant agnostic: i don't know, and you don't know either.