[asterisk-users] Core show translation > 4000ms

[Administrator TOOTAI]

Le 30/09/2011 14:05, Kevin P. Fleming a écrit :
> On 09/30/2011 03:56 AM, Administrator TOOTAI wrote:
>> Hi list,
>>
>> we have 2 asterisk boxes in VM (kvm) on 2 different Dell servers, one is
>> Lenny kernel 2.6.26 asterisk 1.6.2.20, the second CentOS 2.6.18 asterisk
>> 1.4.36 (Elastix). Both 64bits, no hardware involved, dahdi on both
>> machines for meetme timing.
>>
>> Doing core show translation give on the Lenny server
>>
>> Translation times between formats (in microseconds) for one second of 
>> data
>> Source Format (Rows) Destination Format (Columns)
>>
>> g723 gsm ulaw alaw g726aal2 adpcm slin lpc10 g729 speex ilbc g726 g722
>> siren7 siren14 slin16
>> g723 - - - - - - - - - - - - - - - -
>> gsm - - 2 2 4001 2 1 2 - - - 4001 4002 - - 4003
>> ulaw - 4001 - 1 4001 2 1 2 - - - 4001 4002 - - 4003
>> alaw - 4001 1 - 4001 2 1 2 - - - 4001 4002 - - 4003
>> [...]
>>
>> and on the CentOS one
>>
>> g723 gsm ulaw alaw g726aal2 adpcm slin lpc10 g729 speex ilbc g726 g722
>> g723 - - - - - - - - - - - - -
>> gsm - - 2 2 2 2 1 3 - 6 - 2 2
>> ulaw - 2 - 1 2 2 1 3 - 6 - 2 2
>> alaw - 2 1 - 2 2 1 3 - 6 - 2 2
>> [...]
>>
>> Why do we have such latency on the Lenny machine for the codec
>> translation? Is this due to a kernel parameter?
>
> Because you didn't read the output. It clearly says "(in 
> microseconds)" in the 1.6.x output.
>

Well, I surely ask the wrong way, sorry: ms or us, 4001 from ulaw to gsm 
and 2 the other way, still a huge difference. The output from centos 
shows similar value in both directions.

-- 
Daniel