On Thu, 14 Feb 2002, Georg Acher wrote: > On Thu, Feb 14, 2002 at 09:54:58AM -0600, Matthew Fredrickson wrote: > > > > I just did some testing with the kernel I upgraded to a little bit ago > > (2.4.17), and have some improved results. I now get basically the same > > ISOC performance from both UHCI drivers (not bad, but not > > perfect). However, on the usb-uhci driver, I get a little bit more debug > > info. Whenever there's a gap in the audio, I get a printk that says: > > > > usb-uhci.c: iso_find_start: gap in seamless isochronous scheduling > > > > (This is on the VIA chipset UHCI controller) > > > > Does this help any? > > Well, it says, that the just finished isn't restarted early enough, so a gap > occurs. You should think about either larger transfer buffers (i.e. transfer > more frames with one URB) or more than two URBs.
Ok, I'll do some testing with larger transfer sizes. The only reason I haven't done this thus far is that I'm trying to keep buffering/delays down to a minimal, hence, following TDM (Time Division Multiplexing) paradigms for telephony. Thanks. Matthew Fredrickson _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
