[Freeswitch-users] centos 5.4 timer issue 1000hz, choppy voice at times

Tue May 18 09:48:55 PDT 2010

Don't worry I am just trying to post our policy so I don't have to repeat
it.
I don't get mad at stuff like this, i'm just being assertive.

On Tue, May 18, 2010 at 11:24 AM, Peter Olsson <
peter.olsson at visionutveckling.se> wrote:

>  Anthony,
>
>
>
> Just so you didn’t get me wrong (feels like I got stuck in the middle
> here...). I Just wanted to point out that I do have the same “problem” as
> Wasim. I’m well aware I’m running this on old hardware, I just use it for
> lab purposes, so it really doesn’t matter. I don’t have any audio problems,
> since I just use it for 1-2 silutaneous calls. But I do get the warning when
> I start up FS, the same on both CentOS 5.4 and 5.5 (didn’t try 5.3 on this
> box, I started with 5.4 and upgraded yesterday), so I just wanted to try
> helping out if anyone needed a 5.5 box to try on.
>
>
>
> I’m running “production” (only for internal use, but still) servers on both
> CentOS 5.3 and Windows 2003, which work perfectly fine (no timer gap
> warnings) – but they have good hardware though :)
>
>
>
> Regards,
>
> Peter
>
>
>
> *Från:* freeswitch-users-bounces at lists.freeswitch.org [mailto:
> freeswitch-users-bounces at lists.freeswitch.org] *För *Anthony Minessale
> *Skickat:* den 18 maj 2010 17:35
> *Till:* freeswitch-users at lists.freeswitch.org
> *Ämne:* Re: [Freeswitch-users] centos 5.4 timer issue 1000hz, choppy voice
> at times
>
>
>
> Please heed as this is our official policy.
>
>
>
> There is not an issue with CentOS 5.3.
>
> In fact CentOS 5.3 is the preferred platform (not 5.4 or 5.5 until we do
> proper testing and QA).
>
>
>
> What you are describing is the result of poor hardware, (most likely the
> motherboard)
>
>
>
> FreeSWITCH is Free, your box is not, use the money you save not buying
> FreeSWITCH to buy a decent box.  Even a $500 box can work perfectly fine.
>  Its not my intent to cater to inferior hardware when my goal is to push
> telephony into the future not get caught up in legacy drama with older
> boxes.
>
>
>
> If you have altered the kernel to run at something besides 1000hz, change
> it back to the default of 1000hz.   If you get the error instantly it means
> the kernel is actually configured at the wrong freq.
>
> If the test runs for a long time and concludes it, it most likely means the
> box is not good enough to run FS.
>
>
>
> If you are not careful you may have installed the xen build of the kernel
> (check with uname -a)
>
> This can also cause timing issues.
>
>
>
> If you see that timing gap warning (especially on centos if you have it set
> to 1000hz) it means the motherboard cannot give the OS a good enough timing
> source to provide 1ms resolution which is mandatory and not very demanding.
>
>
>
> I have been on dozens of perfectly happy boxes running CentOS 5.3 and I
> have been on a small handful of boxes that do what you describe and have
> seen that, once they are where they belong, (in the trash) the new
> inexpensive replacement does just fine.
>
>
>
>
>
> On Tue, May 18, 2010 at 2:58 AM, Peter Olsson <
> peter.olsson at visionutveckling.se> wrote:
>
> I also have this behaviour (timer gap around 2000). Upgraded yesterday to
> CentOS 5.5 (from 5.4), but the issue still remains. The system is just used
> for lab purposes, so I could easily fix SSH access if someone wanted to have
> a closer look.
>
>
>
> I should also add – this is a 3-4 year old machine (workstation), but it
> seems this problem is related to newer CentOS-kernels, so I guess it
> shouldn’t be the issue here.
>
>
>
> /Peter
>
>
>
> *Från:* freeswitch-users-bounces at lists.freeswitch.org [mailto:
> freeswitch-users-bounces at lists.freeswitch.org] *För *Wasim Baig
> *Skickat:* den 18 maj 2010 06:20
> *Till:* FreeSWITCH Users
> *Ämne:* [Freeswitch-users] centos 5.4 timer issue 1000hz, choppy voice at
> times
>
>
>
> I know its been discussed previously on list, but has there been any
> progress to the timer issue on centos 5.4 32 bit
>
>
>
> Linux pum2 2.6.18-164.el5 #1 SMP Thu Sep 3 03:33:56 EDT 2009 i686 i686 i386
> GNU/Linux
>
>
>
> [root at pum2 ~]# grep 1000 /boot/config-2.6.18-164.el5
>
> CONFIG_HZ_1000=y
>
> CONFIG_HZ=1000
>
>
>
> i used a basic timer testing utility to confirm what we're actually getting
>
>
>
> [root at pum2 ~]# ./timerchk
>
> kernel timer interrupt frequency is approx. 1002 Hz
>
>
>
> however, fs complains ...
>
>
>
> 2010-05-18 06:17:24.711360 [CONSOLE] switch_time.c:1032 Calibrating timer,
> please wait...
>
> 2010-05-18 06:17:24.861063 [CONSOLE] switch_time.c:223 Test: 1000 Average:
> 2992 Step: 50
>
> 2010-05-18 06:17:24.861097 [WARNING] switch_time.c:227 Abnormally large
> timer gap 1992 detected!
>
> Do you have your kernel timer frequency set to lower than 1,000Hz? You may
> experience audio problems.
>
>
>
> any recommendations, other than drop to 5.3? which is not doable as the box
> is a 5k km away ...
>
>
>
> --
> wasim h. baig | principal consultant | convergence pk | +92 30 0850 8070 |
> peace be upon you ...
>
>
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>
>
>
> --
> Anthony Minessale II
>
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>
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-- 
Anthony Minessale II

FreeSWITCH http://www.freeswitch.org/
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