Art King Posted September 7, 2007 Report Share Posted September 7, 2007 We've been testing pbxnsip v22.214.171.1246 (Win32) installation on a Dell Server with Xeon 3.0 GHZ dual-processor and 2GB of RAM, running Windows 2003 Server R2. We kept seeing jitter. For example, if the web interface Call Status screen was up (http://pbx/dom_calls.htm), each time it would refresh we would get a short burst of jitter on the phones. We saw similar jitter episodes on a conference call each time someone would join or leave the conference. We were monitoring Windows Task Manager and we noticed that the per-processor CPU Usage History graph did a lot of jumping around concurrent with the jitter. Under Task manager Processes, we selected pbxctrl.exe, right-clicked and chose "Set Affinity". By default the PBXnSIP process was set to use both of the processors. We changed it to only use one processor and the jitter problem vanished! We found a Windows utility that allows us to set the Affinity to one processor for a specific process, so we don't have to remember to set this each time we reboot. Looks to us like PBXNSIP needs to do more testing on multi-processing machines. Quote Link to comment Share on other sites More sharing options...
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