Re: [Iaxclient-devel] Some data related to the new bug...

[Steve K. <st...@st...>]

Hey Adam,

    We took you advice here [thanks!], and used something based on your 
code below, which was nice _most_ of the time.

    However, in my office, I have 3 different machines [out of only 
about a dozen or so we've been using this code on regularly], where this 
fails spectacularly.

    The problem is described here, and it is not theoretical.  It causes 
real problems for timing!

http://support.microsoft.com/?id=274323

    So, I've disabled this in iaxclient for now.  My suggestion to you 
for firefly is to just use GetTickCount, and deal with it's 10ms 
accuracy.   The 10ms for us isn't a problem, but the 5 second jumps I 
saw really are!


-SteveK


Adam Hart wrote:

>Why don't you guys just use my code from firefly, it's has nanosecond
>accuracy. Beats the hell out of 10ms accuaracy
>
>static __int64 freq,start;
>static int inited = 0;
>
>//static time_t startuptime;
>
>BOOL APIENTRY DllMain( HANDLE hModule,
>                       DWORD  ul_reason_for_call,
>                       LPVOID lpReserved
>      )
>{
> if(!inited)
> {
>
>  inited = 1;
>  QueryPerformanceFrequency((LARGE_INTEGER*)&freq);
>  QueryPerformanceCounter((LARGE_INTEGER*)&start);
> }
>    return TRUE;
>}
>
>void gettimeofday(struct timeval *tv, struct timezone *tz)
>{
> __int64 time;
> double elapsed;
>
> QueryPerformanceCounter((LARGE_INTEGER*)&time);
>
> elapsed = (double)(time - start) / (double)freq;
>
> tv->tv_sec = (long)elapsed;
> tv->tv_usec = (long)((elapsed-tv->tv_sec) * 1000000);
>}
>
>enjoy,
>    Adam
>
>----- Original Message ----- 
>From: "Steven Sokol" <ss...@so...>
>To: <iax...@li...>
>Sent: Thursday, February 05, 2004 11:34 AM
>Subject: RE: [Iaxclient-devel] Some data related to the new bug...
>
>
>  
>
>>Yes.  Guilty as charged.  It always happens UNDER WINDOWS.
>>
>>I believe that the gettimeofday() is being replaced by a function based on
>>GetTickCount().  I wonder if that doesn't have something to do with it.
>>
>>Steve S
>>
>>-----Original Message-----
>>From: iax...@li...
>>[mailto:iax...@li...] On Behalf Of Steve
>>Underwood
>>Sent: Wednesday, February 04, 2004 5:48 PM
>>To: iax...@li...
>>Subject: Re: [Iaxclient-devel] Some data related to the new bug...
>>
>>Steven Sokol wrote:
>>
>>    
>>
>>>More notes:
>>>
>>>1.  It ALWAYS happens.  It is not an intermittent issue.  This happens
>>>      
>>>
>for
>  
>
>>>EVERY IAX2-to-IAX2 call made using iaxClient.
>>>
>>>
>>>      
>>>
>>Not EVERY call. I make hour long calls using iaxclient IAX2-to-IAX2 and
>>have no trouble. I use Linux. Is that the difference?
>>
>>    
>>
>>>2.  The timing is uncanny.  It ALWAYS happens after 65-67 seconds.
>>>
>>>3.  The audio dies but the call in not immediately torn down.  The call
>>>eventually is eventually killed when the PING/PONG cycle times out some
>>>seconds later (perhaps over a minute in some of my tests).
>>>
>>>4.  In EVERY case, the Asterisk kicks out the aforementioned voice frame
>>>retransmit message.
>>>
>>>
>>>      
>>>
>>As Adam said, there is something wrong if a voice frame is being
>>retransmitted at that point in the call. Perhaps checking places where
>>the frame is tagged for retransmission would home in on the problem.
>>
>>    
>>
>>>5.  I don't see registration messages coming through at the same time.  I
>>>was originally guessing that this happened during the re-reg process.
>>>      
>>>
>Not
>  
>
>>>so (or at least that doesn't seem to be the case -- could be that the
>>>      
>>>
>>re-reg
>>    
>>
>>>that takes place prior to the error causes a problem).
>>>
>>>
>>>      
>>>
>>Regards,
>>Steve
>>
>>
>>
>>
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>>
>
>
>
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>