[Interest] QTimer stops triggering

[Pritam]

On Monday 04 June 2012 07:36 PM, Vannoote, Frederik wrote:
>
> Hi Syam,
>
> The Qtimer object is only created once and lives on for ever.
>
> It has an interval of 30 seconds.
>
> Most of the times they stop triggering after 1 or 2 days.
>
I dont know what timer API is used by Qt. If its posix timers 
underneath, Can you try a simple app with posix timers and see if they 
also misbehave.
That way, we will know whether its a platform problem or qt problem.
>
> Kind regards,
>
> Frederik
>
> Frederik Vannoote
>
> Sr. Development Engineer Software
>
> Barco nv
>
> Pres.Kennedypark 35
>
> B-8500 Kortrijk (Belgium)
>
> ------------------------------------------------------------------------
>
> *From:*interest-bounces+frederik.vannoote=barco.com at qt-project.org 
> [mailto:interest-bounces+frederik.vannoote=barco.com at qt-project.org] 
> *On Behalf Of *Syam Krishnan
> *Sent:* 04jun12 16:04
> *To:* interest at qt-project.org
> *Subject:* Re: [Interest] QTimer stops triggering
>
> On 06/04/2012 12:34 PM, Vannoote, Frederik wrote:
>
> Hey all,
>
> I’m having a weird thing about Qtimer which I can’t explain until now.
>
> We are using a dedicated application to kick the processor watchdog. 
> This application is based on a QTimer. Basically, it only has to call 
> an ioctl once every 30 seconds. This is the only thing the application 
> does.
>
> We see that after a random time, the QTimer stops triggering. We have 
> proven that it does not get stuck somewhere, it just does not get 
> scheduled any more.
>
> I’ve replaced the code with a while loop instead of the QT event loop. 
> That seems to be running fine.
>
>
> Do you mean to say that you have set the QTimer to have a time-out of 
> 30 seconds?
> And what is the order of time after which the timer seems to stop 
> working - minutes, hours?
>
> Also, (a wild shot) are you by any chance creating the timer objects 
> afresh everytime?
>
> Syam
>
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-- 
Regards,
Pritam


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