C Incorrect time

[Robot]

On my system some API functions seem to have problems with time tracking. My system is FreeBSD 10.3 running on hyper-v server 2012.

Calling alarm(20) results in SIGALRM after 11 seconds and sleep(15) returns after 5 seconds.

The behavior of sigtimedwait() is as expected, when no signal is received, -1 is returned with errno = EAGAIN exactly after the given timeout. Also the date command in a terminal shows the correct date and time.

Is there any way to correct these time errors?

Thanks in advance

 

[SirDice]

Not sure if it's going to help but for virtual machines it's usually helpful to add to /boot/loader.conf:

kern.hz=100

This usually helps with timing issues.

 

[Robot]

I added kern.hz=100 and it helped. The described problems are solved. Thank you very much for your help.