On Mon, 9 Jun 2003, etienne deleflie wrote:
> >>> What do you get for:
> >>>
> >>>x11perf -repeat 1 -shmput500
> >>>
> >>> If run in depth 24, the fps is roughly the bandwidth, in MB/sec
> >>>to the framebuffer.
> >>>
> >>>
> >>>
> >>I get
> >>
> >>x11perf - X11 performance program, version 1.5
> >>The XFree86 Project, Inc server version 40100001 on :0.0
> >>from sine
> >>Sun Jun 8 14:34:04 2003
> >>
> >>Sync time adjustment is 0.0489 msecs.
> >>
> >> 360 reps @ 16.0078 msec ( 62.5/sec): ShmPutImage 500x500 square
> >>
> >>
> >>
> >
> > Something is wrong with your system.
> >
> can I know on what figures and logic you draw this conclusion ? ... are
> those figures too slow ?
Yes. Less than half what it should be.
>
> > What does "cat /proc/mtrr" say?
> >
> no such file or directory. I'm on debian.
>
> > And were there any warnings in the /var/log/XFree86.0.log (lines
> >that start "(WW)")?
> >
> ...
> (WW) System lacks support for changing MTRRs
This is your problem. You need a kernel with MTRR support.
It's worth at least a factor of 2 in XvShmPutImage performance.
Mark.
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