On Wed, 2002-06-05 at 20:57, Michael wrote: > On Sun, Jun 02, 2002 at 06:14:08PM +0100, Michael wrote: > > > I'll happily test any patches, just send them my way. > > > > Ok, I'll post something later... > > hmm, further playing around, I changed the CPWaitForIdle to use the > non-CP WaitForIdle so the looping in X is in user space not system, > removed the wait_for_fifo and a couple of FLUSHes that I can't see are > necessary(and don't have any adverse affect afaict).
Sounds reasonable, except maybe for the flushes - do you mean the FLUSH_RING()s? I think removing those could hurt 2D responsiveness. > If anything it just appears to hide the fundamental problem by reducing > the amount of spinning - wait_for_fifo seems redundant as does the > EnterServer NeedToSync, but given the number of times it syncs, its > probably not significant and there might be a case where it does matter > > afaict the flag is set in xaa/... whenever direct fb access is done and > probably in some places where it doesn't need to be set because the > radeon driver accel functions are using the ring. But that's not the point AFAIUI. We need to set the flag to tell XAA that the chip has been modifying the framebuffer and it has to sync before doing direct access. > The biggest problem I'm seeing is massive system cpu time for certain 3d > apps when they are hidden effectively grinding the system to a halt > perhaps we should detect the hidden state or simply move these spins to > user space where the schedular and nice, or possibly even make the spins > into a wait queue as I mentioned before - does the new interrupt code > allow you to fire an interrupt on frame completion or idle states? That might be good, what new interrupt code are you talking about? -- Earthling Michel D�nzer (MrCooper)/ Debian GNU/Linux (powerpc) developer XFree86 and DRI project member / CS student, Free Software enthusiast _______________________________________________________________ Don't miss the 2002 Sprint PCS Application Developer's Conference August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
