On Sun, 21 Apr 2002, José Fonseca wrote: > > We just need to add the fifo check now. > > I've just add it but it makes gears drop from 222 to 185 fps in my system. > I don't know if this is caused by droped triangles when there is no FIFO > check, or if the FIFO check makes a big overload. So I #ifdef'd it out. > Note that I even avoided to use udelay or any other time function, but it > didn't help.
I've always wondered why we never ran into lockups before. The previous branch had places where potentially more than 16 writes would happen without checking the fifo. Since the fifo depth is acutally deeper than 16 and the check just looks at the last 16 slots, maybe we've been lucky. With DMA, we won't have this issue, but I think while were using pseudo-DMA as a debugging aid and if we leave it in as a fallback, we should keep the fifo check there just to rule out engine lockups caused by a fifo overflow. I don't expect this to be as fast as doing the register writes client side, so I'm not too worried about the performance hit. -- Leif Delgass http://www.retinalburn.net _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
