That's the problem we had with Asterisk and HT on a 2.4 Kernel: whenever Asterisk was staying in the RTP stream, and HT was enabled (on a Dell Dual Xeon system), we had choppy audio. After disabling HT, everything was fine again. Nothing measurable, indeed, but you could definitely hear it. So there *must* be something. -Manuel -----Messaggio originale----- Da: Peter Corlett [mailto:abuse@cabal.org.uk] Inviato: martedì, 1. giugno 2004 16:09 A: asterisk-users@lists.digium.com Oggetto: Re: [Asterisk-Users] Hyperthreading? Andrew Kohlsmith <akohlsmith-asterisk@benshaw.com> wrote: [...]> They can't? HT is detected in /proc/cpuinfo (flags) and I see two > processors with 2.4.25 SMP kernels... What exactly isn't it using?Linux doesn't realise that scheduling a process onto one virtual CPU reduces the performance available on the other. There can be some quite bizarre scheduling decisions made as a result that can slow things down. On the other hand, for some tasks, it might not cause problems and thus you'll get a boost. As ever, the answer is to benchmark your configuration with and without HT to see. There's no simple answer. ___________________________________________________ Ticinocom SA - Via Stazione 5 - 6600 Muralto Tel 0844 007070 - Fax 0844 007071 http://www.ticinocom.com
What cards was it FXO - cos is it card related this HT problem? -----Original Message----- From: Manuel Wenger [mailto:manuel.wenger@ticinocom.com] Sent: 01 June 2004 3:18 PM To: asterisk-users@lists.digium.com Subject: R: [Asterisk-Users] Hyperthreading? That's the problem we had with Asterisk and HT on a 2.4 Kernel: whenever Asterisk was staying in the RTP stream, and HT was enabled (on a Dell Dual Xeon system), we had choppy audio. After disabling HT, everything was fine again. Nothing measurable, indeed, but you could definitely hear it. So there *must* be something.
We didn't have any card: we had choppy audio on SIP-to-SIP streams. There were no FXO/FXS cards in the system. I don't know what problem the other poster had. -----Messaggio originale----- Da: Chris Bond [mailto:chris@logics.co.uk] Inviato: martedì, 1. giugno 2004 16:22 A: asterisk-users@lists.digium.com Oggetto: RE: [Asterisk-Users] Hyperthreading? What cards was it FXO - cos is it card related this HT problem? -----Original Message----- From: Manuel Wenger [mailto:manuel.wenger@ticinocom.com] Sent: 01 June 2004 3:18 PM To: asterisk-users@lists.digium.com Subject: R: [Asterisk-Users] Hyperthreading? That's the problem we had with Asterisk and HT on a 2.4 Kernel: whenever Asterisk was staying in the RTP stream, and HT was enabled (on a Dell Dual Xeon system), we had choppy audio. After disabling HT, everything was fine again. Nothing measurable, indeed, but you could definitely hear it. So there *must* be something. ___________________________________________________ Ticinocom SA - Via Stazione 5 - 6600 Muralto Tel 0844 007070 - Fax 0844 007071 http://www.ticinocom.com