If you are using an Athlon then you might have a VIA chipset and apparently non-intel chipsets can have these sorts of interrupt problems (Via especially). Try changing to an intel chipset motherboard.
Craig ----- Original Message ----- From: "Michael Welter" <[EMAIL PROTECTED]> To: "Asterisk Users Mailing List - Non-Commercial Discussion" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Tuesday, December 14, 2004 5:57 AM Subject: [Asterisk-Users] CPU spikes with wcfxs loaded > I need to reopen this discussion because it's impossible to run spandsp > (and VoIP) under these circumstances. > > With zaptel unloaded, I see the following "vmstat 1" output: > > no swapping, an occasional disk output, +/- 1003 interrupts/sec., less > than 10 context switches/sec., CPU idle 100%. A very quiet system. > > I load modules zaptel and wcfxo, and the system utilization stays the > same. When I load wcfxs, the number of interrupts goes up to +-2004, > which is normal. However, every three seconds the CPU spikes to 50%. > This is "system" utilization, not userland. I assume it's in a wcfxs > interrupt. > > The number of interrupts stays constant at about 2004 during each spike, > leading me to the conclusion that the TDM card is holding an interrupt > for 500ms every three seconds (50% of 1000ms is 500ms). This is a > disaster for spandsp and VoIP in general. > > When I unload the wcfxs module, CPU idle goes back to a constant 100%. > > The TDM22B card is REV E/F, and I've tried it with several different > cards. Fedora Core 3 with linux-2.6.9 downloaded from kernel.org (a > stock kernel). The CPU is Athlon K7. > > Can anyone please give me a clue? > > Thanks, > > -- > Michael Welter > Introspect Telephony Corp. > Denver, Colorado US > +1.303.674.2575 > [EMAIL PROTECTED] > www.introspect.com > _______________________________________________ > Asterisk-Users mailing list > [EMAIL PROTECTED] > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users