[Freeswitch-users] Kernel timer warning with CentOS 5.4

[Peder]

Is there a way to tell how accurate the timing is on a box before running
FreeSWITCH on it?

 

From: freeswitch-users-bounces at lists.freeswitch.org
[mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Anthony
Minessale
Sent: Wednesday, March 10, 2010 10:26 AM
To: freeswitch-users at lists.freeswitch.org
Subject: Re: [Freeswitch-users] Kernel timer warning with CentOS 5.4

 

FS now tries to determine how accurate the timing is by doing some tests
with 1ms sleeps.
Most 64 bit CentOS box I have seen can easily calibrate.
If you are having that error alot but the calls still sound ok, it's safe to
ignore it.
you can also start FS with -nocal to skip this test.

Also make sure you do not have any other cpu-intensive application on your
box possibly competing for resources.



On Wed, Mar 10, 2010 at 3:42 AM, Tihomir Culjaga <tculjaga at gmail.com> wrote:

i have the same issue but on centos 4.8 ... on 5.4 doesn't complain...

what is this related to ?

T.

 

On Mon, Mar 8, 2010 at 2:25 PM, Bruce Hopkins <jbrucehopkins at gmail.com>
wrote:

Hi Anthony,

Many, many apologies to take so long to reply - I failed to notice your
response.  Sorry !

It seems to be variable.  Most times (on CentOS 5.3) when I start FS it
tells me it is around 1995ms.  Occasionally it is lower (sub 1000ms) and
then does not give a warning.

Best wishes
Bruce

 

On 1 March 2010 16:47, Anthony Minessale <anthony.minessale at gmail.com>
wrote:

we are still wary about 5.3 due to bugs reported in libc.
What number does it say it detected for the gap?



On Sun, Feb 28, 2010 at 12:03 PM, Bruce Hopkins <jbrucehopkins at gmail.com>
wrote:

OK - I've realised I do get the same warning with CentOS 5.3, it just goes
past more quickly so I didn't see it.  Maybe it is just the hardware ....

 

On 28 February 2010 15:37, Bruce Hopkins <jbrucehopkins at gmail.com> wrote:

Hi,

I wonder if anyone would be able to advise please:

When I build FreeSWITCH on yum updated CentOS 5.4, I get a warning when I
start FreeSWITCH that 

"Abnormally large timer gap detected"
"Do you have your kernel timer set to greater than 1kHz?  You may experience
audio problems".

I get no such warning if I build on CentOS 5.3, and the test timings it
measures on starting FreeSWITCH do look lower.  All I was doing to upgrade
to Centos5.4 was a yum update on the 5.3 build.

I guess the warning comes from here:
http://fisheye.freeswitch.org/browse/~raw,r=16409/FreeSWITCH/src/switch_time
.c
<http://fisheye.freeswitch.org/browse/%7Eraw,r=16409/FreeSWITCH/src/switch_t
ime.c> 

This is all on pretty low spec hardware - a couple of different Dell
optiplex p4's I use for testing.

Does anyone happen to know if I should just stick to Cent)S 5.3, or use 5.4
and not worry about the warnings, or if there is something I can do to fix
the problem it is warning about.  Perhaps it is just that I shouldn't use
such crummy hardware?!

Many thanks in advance
Bruce

 

 

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Anthony Minessale II

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Twitter: http://twitter.com/FreeSWITCH_wire

AIM: anthm
MSN:anthony_minessale at hotmail.com
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