Andreas Mohr writes: > On Tue, Oct 29, 2002 at 03:43:06PM -0500, Jesse Marlin wrote: > > Andreas Mohr writes: > > > Hmm, is it some crackling sound whenever you play something ? > > > If so, does it increase with increasing HDD or network load ? > > > Which board/chipset is this ? Maybe VIA or SiS 735 ? > > > My Aztech PC168 has such crackling sound problems on my ECS K7S5A board > > > (SiS 735 chip), and the chip has quite a history of DMA transfer issues > > > with soundcards. > > > > Yes, crackling especially when I play a network game. I did not > > initially suspect the network card, I suspected the video card. But > > I noticed that the soundcard was IRQ sharing with eth0. That's what > > convinced me. > > > > The chipset is an SiS651, which is supposed to be based on the SiS648, > > but has a lot of integrated peripherals. > Ah, so it might be that SiS has some more general issues with this... > > One thing you could do is to make *dead sure* that the interrupt handlers > used for the soundcard and the network card use the *absolute minimum* > of overhead in case of interrupt sharing. > E.g. something like: > > if (! (inw(card_iobase+IRQ_FLAG) & MY_VERY_IMPORTANT_IRQ_HAPPENED))) > return; /* get the hell outta this IRQ handler - this IRQ was NOT for us, but >for the other card !! */
I will look into this. Thanks for the tips. > > at the *very* beginning of each of the two different interrupt handlers > in the cards' drivers. > > If one or both of these cards really have some very slow interrupt handler > processing, then please submit a patch fixing this problem. > > > > Try inserting the card into a different PCI slot. Could make > > > one hell of a difference. > > > > Unfortunately it is an intergrated card. And I have been unable to > > tell the BIOS to give this card a seperate IRQ. > Sounds like bad luck then :-) > > One more thing: try fiddling with PCI latency settings > (groups.google.com "linux setpci latency"). Thanks. ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Alsa-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user
