Wai Wu wrote:
Hi,
Anyone know how to compile asterisk for a hyperthreaded processor? Thnx
Wai,
Asterisk makes heavy use of threads, so all that's required to take
advantage of HyperThreading is an SMP kernel. The kernel itself will
take care of scheduling the threads on the different virtual and (if
they exist) physical CPUs. In my experience, Asterisk scales well
across processors. On my production server (a Quad Xeon with
HyperThreading turned off), 'ps auxm' currently shows 160 Asterisk
threads, none of which are taking over 0.8% of CPU.
Keep in mind that HyperThreading does not guarantee better performance.
Depending on the application, you may actually see a performance
degradation <http://news.zdnet.co.uk/0,39020330,39237341,00.htm>. I've
heard arguments on both sides of the HyperThreading debate as it
pertains to Asterisk, so my best advice is to do some testing and see
which works best for your particular scenario. Remember, what may be
good for CPU utilization might be bad for the quality of a call using
Digium hardware.
Input from other users may also be very valuable in helping you decide
whether or not to enable HyperThreading. Providing a more detailed
description of your server, including the Digium hardware installed,
would probably lead to more constructive information.
Matthew Roth
InterMedia Marketing Solutions
Software Engineer and Systems Developer
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