a forward from comp.realtime. -------- Original Message -------- Subject: Re: RTAI+NVidia driver = not realtime??? Date: Fri, 24 Nov 2000 12:06:11 +0100 From: Richard Spijkers <[EMAIL PROTECTED]> Reply-To: [EMAIL PROTECTED] Organization: prive Newsgroups: comp.realtime References: <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> Erwin Rol wrote: > > Seems like my S3Virge is not the only card with problems. > > question to Richard: > What X-Server ? XFree-3.x or XFRee-4.X or some commercial one XFree version 4.0.1 .. > I have seen jitter up to 50msec (without X maxium or 30usec) when The NVidia (accelerated) driver causes jitter up to 110 usec and without acceleration upto 6 usec... I saw that the AGP-data-transfer routine in the NVidia driver cli's and sti's for a short time... > running > XFree-4.0.1 on with my S3Virge clone card. Disableing acceleration got > the jitter > down to the 30usec again. The IRQ disableing in XFree is only done in a > few places > and only for a clockprobe during startup, not when drawing anything. I > replaced > those functions in the source with NOP dummies and that did nothing. > The current discusion (on the RT-linux list) seems to go in the > direction > of a PCI-bus lockingup for a short(several msecs) while. > > I am interested in hearing what kind of hardware you use (MB, CPU, RAM, > etc.) and AMD-K6 550 MHZ, Asus P5A, Diamond Viper 770.. But also at home I had the same problems with my: AMD Athlon 550, Asus K7M, Asus v3800 ultra... > what X-Version. And just join the RT-Linux (also the home for RTAI > discusions) at > http://www.rtlinux.org/mailing_lists.html > > - Erwin -- [rtl] --- To unsubscribe: echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] --- For more information on Real-Time Linux see: http://www.rtlinux.org/rtlinux/
