[asterisk-users] Bridged PRI calls - processor involvement?

[Steve Hanselman]

This is the io wait figure from vmstat.

If I run a vmstat 2 whilst I'm on a call I can see that the "wa" figure
gets very high when the missing audio problem occurs.

Steve


-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Matthew
Fredrickson
Sent: 08 June 2007 19:38
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] Bridged PRI calls - processor involvement?

iowait time?  I'm not familiar with that.  Where are you seeing that?  
Also, is it a reproducible problem?

---
Matthew Fredrickson
Software Engineer
Digium, Inc.

On Jun 8, 2007, at 11:23 AM, Steve Hanselman wrote:

> It probably did but we run in updates every week and nobody can state
> exactly when the problem started only "a few weeks ago" - not very
> helpful.
>
> I can see that when I hear the issue the iowait time is high on the
> processor.
>
> Steve
> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Matthew
> Fredrickson
> Sent: 08 June 2007 15:43
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [asterisk-users] Bridged PRI calls - processor 
> involvement?
>
> Did it accompany an update you made?  If you can find out what version
> the problem started occurring, that would help in fixing the problem.
>
> Matthew Fredrickson
> Software/Hardware Engineer
> Digium, Inc.
>
> On Jun 8, 2007, at 2:59 AM, Steve Hanselman wrote:
>
>> The setup.
>>
>> Asterisk is on a 3G Zeon Dell 2850 running Fedora Core 5/6 (all yum
>> updates applied), the TE410 lives on it's own interrupt.
>> Asterisk sits between our telco and a PRI enabled PBX.
>> These are the relevant versions installed:
>>
>> Linux: 2.6.20-1.2316.fc5smp
>> Zaptel: 1:1.4.2.1-34.fc5
>> Asterisk: 1:1.4.0-34.fc5.at
>> Libpri: 1:1.4.0-16.fc5.at
>> Wildcard details:
>> Found TE4XXP at base address fe3ffc00, remapped to f88bec00
>> TE4XXP version c01a016a, burst OFF, slip debug: OFF
>> Octasic optimized!
>> FALC version: 00000005, Board ID: 00
>> Reg 0: 0x377bb400
>> Reg 1: 0x377bb000
>> Reg 2: 0xffffffff
>> Reg 3: 0x00000000
>> Reg 4: 0x00000001
>> Reg 5: 0x00000000
>> Reg 6: 0xc01a016a
>> Reg 7: 0x00001f00
>> Reg 8: 0x00000000
>> Reg 9: 0x00ff0000
>> Reg 10: 0x0000004a
>> TTE4XXP: Launching card: 0
>> TE4XXP: Setting up global serial parameters
>> Found a Wildcard: Wildcard TE410P (3rd Gen)
>> TE4XXP: Span 1 configured for CCS/HDB3/CRC4
>> TE4XXP: Span 2 configured for CCS/HDB3/CRC4
>>
>>
>>
>> The problem:
>>
>> At random points during calls we lose 1-3 seconds of speech (both
ways
>> both callee and caller), this can be replicated (or at least a very
>> good
>> approximation!) by generating a high level of interrupt/cpu activity
>> (for instance copying data from a USB caddy as we tried the other day
>> in
>> an attempt to reproduce this more reliably).
>>
>> The calls are bridged PRI:PRI calls, no VOIP involvement.
>>
>> This was not a problem until approx 3-4 weeks ago, but I can't tie it
>> down to an exact date.
>>
>> Steve
>>
>>
>>> Interrupt sharing is not a problem anymore with those cards.  What
>>> version of zaptel did you try installing?  Can you explain more
about
>>> your problems?  Also, your configuration and setup would help out as
>>> well.
>>>
>>> ---
>>> Matthew Fredrickson
>>> Digium, Inc.
>>
>>
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