Problem solved - I had to switch from 24bpp to 16bpp. Should've checked
bandwidth first.
Vladimir Dergachev
On Sun, 7 Oct 2001 [EMAIL PROTECTED] wrote:
>
> I found another symptom of "freezes with Radeon" problem.
> It looks like getimage is very slow.
>
> Compare:
>
> P-IV 1.8ghz, Radeon 1002:5144 AGP x11perf -getimage500
> Sync time adjustment is 0.0418 msecs.
>
> 20 reps @ 207.6316 msec ( 4.8/sec): GetImage 500x500 square
> 20 reps @ 248.5548 msec ( 4.0/sec): GetImage 500x500 square
> 20 reps @ 208.7967 msec ( 4.8/sec): GetImage 500x500 square
> 20 reps @ 248.4327 msec ( 4.0/sec): GetImage 500x500 square
> 20 reps @ 207.6785 msec ( 4.8/sec): GetImage 500x500 square
> 100 trep @ 224.2189 msec ( 4.5/sec): GetImage 500x500 square
>
>
> Versus:
>
> PIII-800mhz, Rage Mobility M3 AGP x11perf -getimage500
>
> Sync time adjustment is 0.0535 msecs.
>
> 80 reps @ 63.9693 msec ( 15.6/sec): GetImage 500x500 square
> 80 reps @ 71.2674 msec ( 14.0/sec): GetImage 500x500 square
> 80 reps @ 63.9885 msec ( 15.6/sec): GetImage 500x500 square
> 80 reps @ 71.2154 msec ( 14.0/sec): GetImage 500x500 square
> 80 reps @ 64.0236 msec ( 15.6/sec): GetImage 500x500 square
> 400 trep @ 66.8928 msec ( 14.9/sec): GetImage 500x500 square
>
> -getimagexy500 is even slower (0.4 sec and 0.9 sec correspondingly), but I
> guess, this is due to the additional workload required.
>
> All of -copypixpix500, -copypixwin500, -copywinwin500 and -copywinpix500
> give good results on both computers (around 1200/sec for Radeon card,
> slightly below 1000/sec for Rage Mobility M3).
>
> I believe that slow getimage will cripple perfomance of pagers that
> attempt to make window snapshots.
>
> Any thoughts on fixing this ? (Yes, I know that DMA would be ideal,
> but besides that, why would copying off Radeon card be slower than R128 ?
> Does anyone know of any substantial differences between BX and i850 in
> this regard ?)
>
> thanks
>
> Vladimir Dergachev
>
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