[Vm-dev] asserta(newUtcMicrosecondClock >= utcMicrosecondClock) failing

[Igor Stasenko]

On 25 December 2010 16:56, Mariano Martinez Peck <marianopeck at gmail.com> wrote:
>
> Hi everybody. I hope you are enjoying a wonderful and happy Christmas.
>
> Yesterday something weird happened with my cog vm. This assert was failing:
>
> "newUtcMicrosecondClock >= utcMicrosecondClock 127"
>
> a lot of times...
>
> I checked and this is line 127 of sqUnixHeartbeat.c. I am in a MacOS vm, but it seems that file is used anyway.
>
> Now...I have no idea why this assert was failing, nor its severity. What does it mean? there is something wrong?  where can I take a look?
>

if microseconds clock counter is 32-bit, then it wraps over time to time.
VM should be aware that this may happen and should take appropriate
measures (like adjusting the wait timeouts etc).

> It seems it is not easy to reproduce :(
>
yeah, you should wait another
~ 2^32  / 1000000 seconds

> Thanks in advance,
>
> Mariano
>
>



-- 
Best regards,
Igor Stasenko AKA sig.