[Freeswitch-users] Kernel timer warning with CentOS 5.4

[Anthony Minessale]

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_time.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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-- 
Anthony Minessale II

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