[Interest] QTimer stops triggering
pritam_ghanghas at infosys.com
Mon Jun 4 16:19:17 CEST 2012
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
That way, we will know whether its a platform problem or qt problem.
> Kind regards,
> 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
> 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?
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