On Friday 15 April 2005 07:45, Damian Funnell wrote: > Digium have told us that a problem that we are having (with accuracy of > zap interface as measured using zttest) may be due to the fact that we > have a Xeon processor with hyperthreading and have suggested turning H/T > off. > > Anyone else experienced a problem like this? No too keen about turning > H/T off, as we're running the SMP RH kernel and don't really feel like > replacing the kernel (and other kernel-specific bits) on the off chance > that H/T is actually the problem.
AFAIK, HT is not useful if your application does a lot of floating point calculations as there is only one FPU. What happens is that there is a 1-2% overhead when HT is on (for semaphores and such). IF HT does not gain more than this 1-2% you actually end up slowing things down and this is the case for floating point applications (because of only one FPU). IS asterisk floating point heavy ? Paul H -- Paul Hewlett (Linux #359543) Tel: +27 21 852 8812 Cel: +27 72 719 2725 Fax: +27 86 672 0563 -- _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users