asterisk users - May 2009 - precision of wait dialplan application

Hello !

In order to chase after a problem I implemented the following dialplan to have
an
answertime of exactly one minute:

exten => xxxxxxxxxxx,1,NoOp(Test wait)
exten => xxxxxxxxxxx,n,Answer
exten => xxxxxxxxxxx,n,NoOp(Current timestamp:
${STRFTIME(${EPOCH},,%C%y%m%d%H%M%S)})
exten => xxxxxxxxxxx,n,Wait(60)
exten => xxxxxxxxxxx,n,NoOp(Current timestamp:
${STRFTIME(${EPOCH},,%C%y%m%d%H%M%S)})
exten => xxxxxxxxxxx,n,Hangup

But it seems the Wait(60) lasts longer than 60 seconds:

     -- Executing [xxxxxxxxxxx at from_meridian:1] NoOp("DAHDI/29-1",
"Test wait") in new stack
     -- Executing [xxxxxxxxxxx at from_meridian:2]
Answer("DAHDI/29-1", "") in new stack
     -- Executing [xxxxxxxxxxx at from_meridian:3] NoOp("DAHDI/29-1",
"Current timestamp: 20090506135813") in new stack
     -- Executing [xxxxxxxxxxx at from_meridian:4] Wait("DAHDI/29-1",
"60") in new stack
     -- Executing [xxxxxxxxxxx at from_meridian:5] NoOp("DAHDI/29-1",
"Current timestamp: 20090506135915") in new stack
     -- Executing [xxxxxxxxxxx at from_meridian:6]
Hangup("DAHDI/29-1", "") in new stack

What is wrong in this example ?

Regards

Hans

On Wed, May 6, 2009 at 8:17 AM, Johann Steinwendtner
<steinwendtner at gmx.net> wrote:
> But it seems the Wait(60) lasts longer than 60 seconds:
>
> ? ? -- Executing [xxxxxxxxxxx at from_meridian:1]
NoOp("DAHDI/29-1", "Test wait") in new stack
> ? ? -- Executing [xxxxxxxxxxx at from_meridian:2]
Answer("DAHDI/29-1", "") in new stack
> ? ? -- Executing [xxxxxxxxxxx at from_meridian:3]
NoOp("DAHDI/29-1", "Current timestamp: 20090506135813") in
new stack
> ? ? -- Executing [xxxxxxxxxxx at from_meridian:4]
Wait("DAHDI/29-1", "60") in new stack
> ? ? -- Executing [xxxxxxxxxxx at from_meridian:5]
NoOp("DAHDI/29-1", "Current timestamp: 20090506135915") in
new stack
> ? ? -- Executing [xxxxxxxxxxx at from_meridian:6]
Hangup("DAHDI/29-1", "") in new stack
>
> What is wrong in this example ?
Could be rounding error. Try it ten times and see if it's always that
wrong. If it's always that wrong, just do a wait(59) :-p