Hi Sara,
thank you very much for this detailed explanation!
I am still thinking of what is the best approach for our application, that
is simple and reliable enough.
Nevertheless, I see that there is a general interest in this feature.
May I propose again to add this in the kernel itself?
So the
Hi Fotis,
I think I was very brief on my answer.
So I decided to draw this draft to detail the watcher/watched example
and then you decide if it is suitable for you or not.
Note: Unfortunately, I am not an expert on signaling nor
scheduling to foresee all possible scenarios here and answer your qu
I would like to ask, are there cases where the timer may not fire?
Is it guaranteed to fire, for example, if the thread is in a dead lock,
The signal will be delivered to some thread in the task group, so in
that sense it will "fire". However, it may be the case that the the
dead locked th
These are all good ideas, thank you!
I am considering the posix timer approach.
I would like to ask, are there cases where the timer may not fire?
Is it guaranteed to fire, for example, if the thread is in a dead lock, or
if a higher priority thread has caused CPU starvation, or similar cases?
Σ
Please,
take a look at the watcher/watched examples:
https://github.com/apache/incubator-nuttx-apps/tree/master/examples#watcher-watcher--watched
.
The watcher uses a Hardware WDT to monitor the subscribed watched tasks.
In this case, the "watched" example have 4 subscribed tasks.
Note: these exam
> > If you want to catch some task/thread in an infinite loop, the hardware
> > watchdog monitor in nuttx can do it for you.
>
> If the hardware watchdog is fed from multiple sources, all of them need to
> fail. Not just one of them.
> Do you have anything else in mind?
>
> > You don't need a spe
On 2021-03-14 19:27, Gregory Nutt wrote:
Of course. But it will not be easy to do if you want to watch multiple
threads. Because the hardware watchdog is very binary. If any thread
were to kick the watchdog, it will not do a reset. So if one thread is
hung, but others still run, your hardware
Of course. But it will not be easy to do if you want to watch multiple
threads. Because the hardware watchdog is very binary. If any thread
were to kick the watchdog, it will not do a reset. So if one thread is
hung, but others still run, your hardware watchdog will not do what
you want, pos
On Sun, Mar 14, 2021 at 9:40 AM Johnny Billquist wrote:
> On 2021-03-14 17:36, Xiang Xiao wrote:
> > On Sun, Mar 14, 2021 at 8:27 AM Fotis Panagiotopoulos <
> f.j.pa...@gmail.com>
> > wrote:
> >
> >>> Why not to use the hardware watchdog timer which is more reliable and
> >>> simple than the pure
> If you want to catch some task/thread in an infinite loop, the hardware
> watchdog monitor in nuttx can do it for you.
If the hardware watchdog is fed from multiple sources, all of them need to
fail. Not just one of them.
Do you have anything else in mind?
> You don't need a special timer here,
On 2021-03-14 17:36, Xiang Xiao wrote:
On Sun, Mar 14, 2021 at 8:27 AM Fotis Panagiotopoulos
wrote:
Why not to use the hardware watchdog timer which is more reliable and
simple than the pure software solution?
I do use it, but a hardware watchdog can monitor only one thing (in my case
the ke
On Sun, Mar 14, 2021 at 8:27 AM Fotis Panagiotopoulos
wrote:
> > Why not to use the hardware watchdog timer which is more reliable and
> > simple than the pure software solution?
>
> I do use it, but a hardware watchdog can monitor only one thing (in my case
> the kernel itself).
>
>
If you want
> Why not to use the hardware watchdog timer which is more reliable and
> simple than the pure software solution?
I do use it, but a hardware watchdog can monitor only one thing (in my case
the kernel itself).
I would like to monitor multiple things independently, the system's tasks.
Στις Κυρ,
Why not to use the hardware watchdog timer which is more reliable and
simple than the pure software solution?
On Sun, Mar 14, 2021 at 5:49 AM Fotis Panagiotopoulos
wrote:
> Hi everybody!
>
> I am in need of per-task software watchdog timers.
> I would like to somehow monitor my tasks, and ensure
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