[Asterisk-Users] IAX2 Vs SIP cpu load

[Zoa]

Go to: 
http://www.asteriskguru.com/tutorials/pci_irq_apic_tdm_ticks_te410p_te405p_noise.html 
and search for "affinity", iirc i explain there how to do it with echo 
instead of tasksel.

Zoa

Colin Anderson wrote:
> 2002 called. They want their operating system back. :- ) >
>
>     -----Original Message-----
>     *From:* Mike Lynchfield [mailto:theclubvoip at gmail.com]
>     *Sent:* Tuesday, June 13, 2006 9:42 AM
>     *To:* Asterisk Users Mailing List - Non-Commercial Discussion
>     *Subject:* Re: [Asterisk-Users] IAX2 Vs SIP cpu load
>
>     taskset does not seem to exist on redhad 9 nor freebsd..
>
>     ;)
>
>     On 6/13/06, *Zoa* <zoachien at securax.org
>     <mailto:zoachien at securax.org>> wrote:
>
>
>
>         When i did this test ages ago, i found out that iax was worse
>         than sip,
>         but sip was worse than trunked iax.
>
>         Joachim
>
>         olin Anderson wrote:
>         > I use IAX2 quite a bit and I haven't really noticed any
>         difference between
>         > IAX2 and SIP. CPU usage in Asterisk is aggravated by
>         transcoding, changing
>         > one audio format to another, and SIP or IAX2 is simply the
>         protocol used to
>         > carry the audio. Any function of Asterisk will be affected
>         by high system
>         > load; if you have a loadaverage of 3, for example, your box
>         is in trouble
>         > regardless of the protocol used.
>         >
>         > Although this may have changed in the newer 1.2.X series of
>         Asterisk, I
>         > believe that Asterisk does not support SMP from the
>         perspective of
>         > dispatching *internal* processes to different CPU's,
>         instead, *external*
>         > processes such as AGI's are balanced out and dispatched
>         automatically to
>         > different CPU's - but this is a kernel thing.
>         >
>         > It's generally well-known that a "fake" SMP machine such as
>         a HyperThreading
>         > CPU affects Asterisk negatively, and best practice is to
>         disable
>         > HyperThreading. However, "real" SMP machines have no trouble
>         (I use a 4 way
>         > Xeon). It's possible to "pin" a process to a specific CPU,
>         and in fact, I do
>         > this to force Asterisk to it's own CPU, and pin all other
>         processes to a
>         > specific CPU that Asterisk does *not* use:
>         >
>         > setasteriskaffinity.sh:
>         >
>         > #!/bin/bash
>         > ASTERISKPID=`ps -A | grep -a -A0 "asterisk"`
>         > taskset 0x00000003 -p  ${ASTERISKPID:0:5}
>         >
>         > This "pins" Asterisk to CPU # 4 on a 4 way system. Repeat
>         for all other
>         > processes, to different CPU's with the affinity mask:
>         >
>         > 0x00000000 = CPU 1
>         > 0x00000001 = CPU 2
>         > 0x00000002 = CPU 3
>         > 0x00000003 = CPU 4
>         >
>         >
>         > -----Original Message-----
>         > From: Jon Schøpzinsky [mailto:jos at detele.dk
>         <mailto:jos at detele.dk>]
>         > Sent: Tuesday, June 13, 2006 8:14 AM
>         > To: Asterisk Users Mailing List - Non-Commercial Discussion
>         > Subject: [Asterisk-Users] IAX2 Vs SIP cpu load
>         >
>         >
>         > Hello
>         >
>         > Is it correct that IAX2 uses more CPU, than SIP? Also, can
>         it be true that
>         > IAX2 is much more sensitive against high CPU loads?
>         > Also, does Asterisk support and use multiprocessor
>         architectures, such as
>         > Xeon?
>         >
>         >
>         > Regards
>         > Jon
>         >
>         >
>         >
>
>
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>
>
>
>     -- 
>     Mike
>     Sales Manager
>     http://www.theclubvoip.com
>     Making it happen
>     1.888.470.7253 
>
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