[asterisk-users] Asterisk choking on voice messages announcements

[Sean Brady]

On 04/21/2010 05:36 PM, bruce bruce wrote:
> Here are result of dahdi_test:
>
> [root at ip-10-251-123-3 ~]# dahdi_test
> Opened pseudo dahdi interface, measuring accuracy...
> 99.725% 96.018% 99.532% 91.934% 99.923% 99.923% 99.628% 99.434%
> -434.763% 99.239% 93.770% 99.141% 99.822% 91.232% 99.727% 93.770%
> 99.726% -403.227% 98.069% 98.458% 95.136% 98.749% 91.229% 87.622%
> 98.554% 93.282% -407.620% 94.650% 96.308% 98.750% 96.993% 93.478%
> 94.063% 93.381% 61.745% -379.400% 99.628% 99.921% 99.142% 96.797%
> 98.457% 99.337% 87.909% 95.141% -396.880% 99.531% 99.923% 99.921%
> 91.035% 96.408% 91.916% 90.255% -402.153% 81.079% 74.534% 96.212%
>
> What can one tell from these?
>
> On Wed, Apr 21, 2010 at 6:59 PM, bruce bruce <bruceb444 at gmail.com 
> <mailto:bruceb444 at gmail.com>> wrote:
>
>     Thanks for the input.
>     I am going to check this once I get access to system again tonight.
>     But I thought the timing source dahdi_dummy is only good for
>     features like MeetMe or conference rooms? or am I wrong and it has
>     an effect on any type of calls and checking voice messages?
>     Thanks
>
>     On Wed, Apr 21, 2010 at 2:49 PM, Ryan Bullock <rrb3942 at gmail.com
>     <mailto:rrb3942 at gmail.com>> wrote:
>
>         So I be it sounds like all the recordings are underwater.
>
>         Are you using dahdi for timing? Can you run dahdi_test?
>
>         Asterisk needs a good timing source, in the case when you
>         don't have a physical card providing it, it relies on kernel
>         ticks or the RTC (or HPET). Because of the nature of virtual
>         machines they don't always get access to the processor when
>         they want and therefore their timing can get skewed and can be
>         bad for real-time applications.
>
>         There are some patches/work-arounds that you can do. You might
>         want to google 'asterisk in a virtual machine' or 'asterisk
>         timing virutal machine', or anything along those lines.
>
>         I think I remember in some of the recent dahdi or asterisk
>         release notes that they changed some settings to be more
>         virtual machine friendly. So maybe make sure you are running
>         the latest versions?
>
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>

What in the world?  Bruce, that is a measure of accuracy of your timing 
source.  I believe that is the issue.  What is this running on?
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