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nik.middleton at noble...
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 Posted: Thu Jun 18, 2009 2:56 pm Post subject: [Freeswitch-users] high cpu utilization |
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Hi Guys,
This one has me a little baffled. If have a recent build (in the last week) of FS installed on two near identical HP servers. One happily runs 400 concurrent calls at around 50% CPU. The other can only run around 50 calls without the CPU going to 98%. Identical configs and lua script.
Only diff is that the server having problems is running latest centos 64bit, where the other is 32bit. Any suggestions of where I might start looking?
Regards, |
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tntknight at gmail.com
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nik.middleton at noble...
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anthony.minessale at g...
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| Posted: Fri Jun 19, 2009 9:55 am Post subject: [Freeswitch-users] high cpu utilization |
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use top -H to get the per-thread cpu usage.
see if any one thread is using more than the rest.
then get a gcore of the running process and do a
thread apply all bt
and get a bt from the thread with the matching id.
Maybe that will tell you what is doing all the work.
On Fri, Jun 19, 2009 at 3:23 AM, Nik Middleton <nik.middleton@noblesolutions.co.uk (nik.middleton@noblesolutions.co.uk)> wrote:
--
Anthony Minessale II
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apt.get at gmail.com
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| Posted: Fri Jun 19, 2009 10:20 am Post subject: [Freeswitch-users] high cpu utilization |
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On Fri, Jun 19, 2009 at 2:23 AM, Nik
Middleton<nik.middleton@noblesolutions.co.uk> wrote:
| Quote: | I’m running Linux 2.6.18-128.1.10.el5PAE on i686 on the server, so sadly I
don’t think that’s the issue
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I could be wrong, but I think PAE is a 32-bit kernel adapted for
hardware with >4GB RAM. This can create a lot of overhead compared to
running a true 64-bit kernel or a 32-bit kernel without PAE.
Confirm this with 'uname -a'
db
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nik.middleton at noble...
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| Posted: Fri Jun 19, 2009 3:20 pm Post subject: [Freeswitch-users] high cpu utilization |
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You are indeed correct, it's the 64bit server that performs well, not
the 32bit PAE version. I'm hoping that's the cause. I need to dig
around and find out if it's possible to change the kernel remotely and
see it sorts the issue. Ultimately I'll update it to 64 bit anyway, but
that's a 500 mile trek.
Regards,
-----Original Message-----
From: freeswitch-users-bounces@lists.freeswitch.org
[mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of
David Burgess
Sent: 19 June 2009 16:20
To: freeswitch-users@lists.freeswitch.org
Subject: Re: [Freeswitch-users] high cpu utilization
On Fri, Jun 19, 2009 at 2:23 AM, Nik
Middleton<nik.middleton@noblesolutions.co.uk> wrote:
| Quote: | I'm running Linux 2.6.18-128.1.10.el5PAE on i686 on the server, so
|
sadly I
| Quote: | don't think that's the issue
|
I could be wrong, but I think PAE is a 32-bit kernel adapted for
hardware with >4GB RAM. This can create a lot of overhead compared to
running a true 64-bit kernel or a 32-bit kernel without PAE.
Confirm this with 'uname -a'
db
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apt.get at gmail.com
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| Posted: Fri Jun 19, 2009 4:10 pm Post subject: [Freeswitch-users] high cpu utilization |
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On Fri, Jun 19, 2009 at 2:19 PM, Nik
Middleton<nik.middleton@noblesolutions.co.uk> wrote:
| Quote: | You are indeed correct, it's the 64bit server that performs well, not
the 32bit PAE version. Â I'm hoping that's the cause. Â I need to dig
around and find out if it's possible to change the kernel remotely and
see it sorts the issue. Â Ultimately I'll update it to 64 bit anyway, but
that's a 500 mile trek.
|
I don't think it's as simple as changing the kernel. My understanding
is that when you change arch you are reinstalling the system. Given
that 32-bit binaries and libs generally will run in a 64-bit
environment though, there may be a way to swing it.
I'm not sure how you would determine whether that were really your
problem. No question a PAE kernel does create overhead though, in some
situations more than others.
db
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