Hi ,<div> Find the dahdi-2.5.1 log</div><div> 99.615% 99.993% 99.994% 99.994% 99.994% 99.995% 99.994% 99.994% </div><div>99.994% 99.994% 99.994% 99.994% 99.994% 99.994% 99.995% 99.994% </div><div>99.994% 99.994% 99.994% 99.994% 99.995% 99.991% 99.994% 99.994% </div>
<div>99.994% 99.994% 99.994% 99.995% 99.992% 99.980% 99.995% 99.994% </div><div>99.604% 99.994% 99.995% 99.994% 99.994% 99.620% 99.609% 99.994% </div><div>99.994% 99.994% 99.994% 99.615% 99.994% 99.994% 99.993% 99.987% </div>
<div>99.994% 99.994% 99.994% 99.994% 99.995% 99.995% 99.994% 99.995% </div><div>99.994% 99.994% 99.918% 99.905% 99.995% 99.993% 99.994% 99.994% </div><div>99.994% 99.994% 99.994% 99.994% 99.994% 99.994% 99.995% 99.994% </div>
<div>99.993% 99.994% 99.995% 99.994% 99.994% 99.994% 99.994% 99.994% </div><div>99.995% 99.994% 99.994% 99.994% 99.995% 99.993% 99.615% 99.994% </div><div>99.994% 99.994% 99.994% 99.994% 99.994% 99.994% 99.604% 99.994% </div>
<div>99.995% 99.993% 99.995% 99.994% 99.994% 99.994% 99.994% 99.995% </div><div>99.994% 99.995% 99.994% 99.994% 99.994% 99.994% 99.996% 99.992% </div><div>99.994% 99.994% 99.994% 99.994% 99.994% 99.994% 99.994% 99.994% </div>
<div>99.996% 99.991% 99.995% 99.995% 99.993% 99.994% 99.994% 99.994% </div><div>99.614% 99.992% 99.997% 99.991% 99.994% 99.993% 99.995% 99.994% </div><div>99.995% 99.993% 99.994% 99.994% 99.995% 99.994% 99.994% 99.995% </div>
<div>99.993% 99.994% 99.995% 99.993% 99.995% 99.995% 99.994% 99.994% </div><div>99.995% 99.999% 99.989% 99.995% 99.993% 99.994% 99.994% 99.994% </div><div>99.604% 99.994% 99.994% 99.994% 99.994% 99.994% 99.998% 99.991% </div>
<div>99.994% 99.994% 99.993% 99.615% 99.994% 99.994% 99.994% 99.995% </div><div>99.994% 99.994% 99.994% 99.994% 99.995% 99.994% 99.994% 99.994% </div><div>99.995% 99.995% 99.994% 99.994% 99.994% 99.994% 99.995% 99.994% </div>
<div>99.994% 99.994% 99.994% 99.994% 99.994% 99.994% 99.995% 99.995% </div><div>99.994% 99.994% 99.995% 99.993% 99.994% 99.993% 99.995% 99.992% </div><div>99.995% 99.994% 99.994% 99.994% 99.994% 99.994% 99.615% 99.994% </div>
<div>99.994% 99.993% 99.994% 99.995% 99.995% 99.994% 99.995% 99.994% </div><div>99.995% 99.993% 99.994% 99.604% 99.993% 99.994% 99.994% 99.736% </div><div>99.723% 99.993% 99.995% 99.994% 99.994% 99.994% 99.994% 99.994% </div>
<div>99.994% 99.992% 99.994% 99.994% 99.998% 99.991% 99.992% 99.994% </div><div>99.993% 99.993% 99.994% 99.994% 99.994% 99.995% 99.994% 99.994% </div><div>99.994% 99.616% 99.995% 99.994% 99.994% 99.994% 99.995% 99.995% </div>
<div>99.994% 99.994% 99.995% 99.993% </div><div>--- Results after 1204 passes ---</div><div>Best: 100.000 -- Worst: 97.650 -- Average: 99.970143, Difference: 99.997439</div><div> <br><br><div class="gmail_quote">On Thu, Sep 29, 2011 at 10:19 PM, Shaun Ruffell <span dir="ltr"><<a href="mailto:sruffell@digium.com">sruffell@digium.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">On Wed, Sep 21, 2011 at 11:37:47AM -0700, Ryan Crowder wrote:<br>
> I'm installing it this afternoon. I'll report back if I notice any<br>
> problems.<br>
><br>
> -----Original Message-----<br>
> From: <a href="mailto:asterisk-ss7-bounces@lists.digium.com">asterisk-ss7-bounces@lists.digium.com</a><br>
> [mailto:<a href="mailto:asterisk-ss7-bounces@lists.digium.com">asterisk-ss7-bounces@lists.digium.com</a>] On Behalf Of Shaun<br>
> Ruffell<br>
> Sent: Wednesday, September 21, 2011 11:35 AM<br>
> To: <a href="mailto:asterisk-ss7@lists.digium.com">asterisk-ss7@lists.digium.com</a><br>
> Subject: Re: [asterisk-ss7] Poor dahdi_test results<br>
><br>
> On Tue, Sep 20, 2011 at 01:13:34PM -0700, Ryan Crowder wrote:<br>
> > # chrt -f 99 dahdi_test -v -c 5<br>
> > Opened pseudo dahdi interface, measuring accuracy...<br>
> ><br>
> > 8192 samples in 8159.824 system clock sample intervals (99.607%)<br>
> > 8192 samples in 8239.544 system clock sample intervals (100.580%)<br>
> > 8192 samples in 8159.856 system clock sample intervals (99.608%)<br>
> > 8192 samples in 8159.833 system clock sample intervals (99.607%)<br>
> > 8192 samples in 8239.856 system clock sample intervals (100.584%)<br>
> > --- Results after 5 passes ---<br>
> > Best: 99.608 -- Worst: 99.416 -- Average: 99.531525, Difference:<br>
> > 99.997346<br>
><br>
> Still strange. Although, since the overall result is 99.9x% range I<br>
> do not believe you will have any problems in this configuration.<br>
> Data is not being dropped, it is just that there is a delay when<br>
> it's being delivered to user space or the clock on your system is<br>
> jumping around slightly.<br>
<br>
Ryan,<br>
<br>
This is a heads up for you. I was looking into something else<br>
recently that I think explains what you were seeing in this thread.<br>
<br>
dahdi-linux 2.5.0.1 has a regression where, for digital cards, a<br>
master span may not be selected on initial configuration. If this is<br>
the case, even though you have a card installed / configured, the<br>
core timer would process your timers and they run somewhere between<br>
a 4ms and 10ms interval depending on the HZ setting in the kernel.<br>
<br>
<a href="http://svnview.digium.com/svn/dahdi?view=revision&revision=10205" target="_blank">http://svnview.digium.com/svn/dahdi?view=revision&revision=10205</a><br>
<br>
I bet if you checkout the current 2.5 branch of DAHDI-linux and test<br>
with that, you will see more precision in the dahdi_test results.<br>
You could also verify this is what you were seeing by putting the<br>
span in loopback and then taking it out to have the driver rescan<br>
for a master span.<br>
<br>
For what it's worth,<br>
Shaun<br>
<br>
--<br>
Shaun Ruffell<br>
Digium, Inc. | Linux Kernel Developer<br>
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA<br>
Check us out at: <a href="http://www.digium.com" target="_blank">www.digium.com</a> & <a href="http://www.asterisk.org" target="_blank">www.asterisk.org</a><br>
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