[asterisk-users] Asterisk 1.62.13 - CPU spikes every 10 minutes - NOT FIXED

[Mike]

Thanks.  Will try all that.  Night time work again ;-)

Mike

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
> bounces at lists.digium.com] On Behalf Of Shaun Ruffell
> Sent: Tuesday, September 28, 2010 15:37
> To: asterisk-users at lists.digium.com
> Subject: Re: [asterisk-users] Asterisk 1.62.13 - CPU spikes every 10
> minutes - NOT FIXED
> 
> On 09/28/2010 02:06 PM, Mike wrote:
> > Thanks, don`t think I don't appreciate all your time, I really do.  So
> > you`re saying it's possibly just fake smoke from a non-existent fire,
and
> > that nothing is actually wrong despite a high load one one of the CPUs?
> >
> > That`s what it really is: I am seeing smoke and am looking for a fire,
> maybe
> > I'm just being paranoid.  That`s what trending and SNMP alarms are for I
> > suppose ;-)
> 
> Perhaps.  It's certainly my best guess based on what you've said.
> 
> Something else you could do without two much trouble to shift things
> around and perhaps change what you're seeing is force all the wct4xxp
> interrupt onto a single CPU and tell IRQ balance to not use that CPU for
> it's normal work.
> 
> i.e. looking at the output from 'cat /proc/interrupts' that you provided
> before I see that the wct4xxp driver is attached to IRQ 177.  So in
> /etc/sysconfig/irqbalance set:
> 
> IRQBALANCE_BANNED_INTERRUPTS=177
> IRQBALANCE_BANNED_CPUS=8
> 
> to prevent irqbalance from using CPU3 or trying to balance IRQ 177, and
> then
> 
> echo 8 > /proc/irq/177/smp_affintity
> 
> To force IRQ 177 onto CPU3 exclusively. Restart irqbalance and after
> which the quad span should only be interrupting on CPU3 and the other
> three cores are free to handle all the other ones.
> 
> It would be interesting to know if you still % hi spikes every 10
> minutes like this.
> 
> 
> --
> Shaun Ruffell
> Digium, Inc. | Linux Kernel Developer
> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
> Check us out at: www.digium.com & www.asterisk.org
> 
> --
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