[CRIU] weird usleep() behaviour on dump

[Radostin Stoyanov]

Hi Andi,

On 13/06/2019 13:31, andi wrote:
> Hi guys!
>
> I’m running CRIU 3.11 on a 4.9 ARM64 Kernel.
>
>
> I’m observing the following. If I have a simple C-Program that sleeps 
> for 5 seconds (usleep(5000000)), and if I dump it after 3 seconds, 
> then the sleep will take 8 seconds. If I dump it periodically every 
> second, the usleep() will never return, and from the moment I stop 
> dumping until it returns it will take 5 seconds.
>
>
> So it looks as if usleep() got restarted with every dump.
>
> Do you guys have an idea why that is? Where it happens?
>
It is likely that usleep() is interrupted by CRIU and if it is called 
within a loop it will start again.

Radostin