[asterisk-ss7] Poor dahdi_test results

[Ryan Crowder]

Do you think this error has anything to do with it?

dahdi_genconf
/usr/sbin/dahdi_genconf: missing default group (termtype=UNKNOWN)
It doesn't populate dahdi-channels.conf so I have to configure
chan_dahdi.conf manually.

Here are the results... not really better.
:/etc/dahdi# dahdi_test
Opened pseudo dahdi interface, measuring accuracy...
99.608% 99.419% 99.608% 99.608% 99.415% 99.608% 99.415% 99.608%
99.608% 99.416% 99.608% 99.415% 99.608% 99.608% 99.415% 99.608%
99.415% 99.608% 99.608% 99.416% 99.608% 99.415% 99.608% 99.608%
99.415% 99.608% 99.415% 99.608% 99.608% 99.415% 99.608% 99.415% ^C
--- Results after 32 passes ---
Best: 99.608 -- Worst: 99.415 -- Average: 99.529880, Difference:
100.004770
:/etc/dahdi# dahdi_test -v -c 5
Opened pseudo dahdi interface, measuring accuracy...

8192 samples in 8159.801 system clock sample intervals (99.607%)
8192 samples in 8159.528 system clock sample intervals (99.604%)
8192 samples in 8239.840 system clock sample intervals (100.584%)
8192 samples in 8159.856 system clock sample intervals (99.608%)
8192 samples in 8239.840 system clock sample intervals (100.584%)
--- Results after 5 passes ---
Best: 99.608 -- Worst: 99.416 -- Average: 99.530042, Difference:
99.997230

Dmesg
[ 9624.587699] dahdi: Telephony Interface Registered on major 196
[ 9624.587704] dahdi: Version: 2.5.0.1
[ 9624.597302] wcte12xp 0000:02:0c.0: PCI INT A -> GSI 39 (level, low)
-> IRQ 39
[ 9625.911967] wcte12xp 0000:02:0c.0: Setting up global serial
parameters for T1
[ 9628.915713] wcte12xp 0000:02:0c.0: Found a Wildcard TE122
[ 9987.311862] dahdi_echocan_mg2: Registered echo canceler 'MG2'
[ 9991.191249] wcte12xp 0000:02:0c.0: Setting yellow alarm

I don't know how to check the wall time other than to say the time looks
right.


-----Original Message-----
From: asterisk-ss7-bounces at lists.digium.com
[mailto:asterisk-ss7-bounces at lists.digium.com] On Behalf Of Shaun
Ruffell
Sent: Tuesday, September 20, 2011 11:08 AM
To: asterisk-ss7 at lists.digium.com
Subject: Re: [asterisk-ss7] Poor dahdi_test results

On Tue, Sep 20, 2011 at 10:42:52AM -0700, Ryan Crowder wrote:
> 
> Thanks for replying!  Here is dahdi_hardware and lspci output.
>  
> dahdi_hardware
> pci:0000:02:0c.0     wcte12xp+    d161:8001 Wildcard TE122
> pci:0000:03:0b.0     rxt1+        0b0b:0305 Rhino R4T1

What happens when you just load the wcte12xp driver? For example:

  $ /etc/init.d/dahdi stop
  $ lsmod | grep dahdi (make sure no other drivers are loaded)
  $ modprobe wcte12xp; dahdi_genconf system (will overwrite your
configs)
  $ dahdi_cfg
  $ dahdi_test -v -c 5
  Opened pseudo dahdi interface, measuring accuracy...
  
  8192 samples in 8191.544 system clock sample intervals (99.994%)
  8192 samples in 8188.704 system clock sample intervals (99.960%)
  8192 samples in 8190.480 system clock sample intervals (99.981%)
  8192 samples in 8190.048 system clock sample intervals (99.976%)
  8192 samples in 8189.799 system clock sample intervals (99.973%)
  --- Results after 5 passes ---
  Best: 99.994 -- Worst: 99.960 -- Average: 99.976991, Difference:
99.976991

If when just using the wcte12xp driver and dahdi_test still reports
poor results I would look in dmesg to see if the driver is reporting
anything about increasing the latency. If there are not any messages
from the driver and dahdi_test has poor results then I would verify
that the system is able to keep accurate wall time.

If the problem only occurs when the rxt1 driver is loaded /
configured, then I would recommend contacting Rhino technical
support.

-- 
Shaun Ruffell
Digium, Inc. | Linux Kernel Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at: www.digium.com & www.asterisk.org

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