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@lists.freeswitch.org [mailto:freeswitch-users-bounces@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@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@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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