Re: [Qemu-devel] [RESEND][PATCH 0/3] Fix guest time drift under heavy load.

[Paul Brook]

> You see time drift with 100hz timers in the guest??  That makes very
> little sense as even without hr timers, the host should have no problem
> delivering a 10ms timer.

If your host has HZ=100 and no HR timers than a 10ms interval is fairly 
borderline, and it's not that hard to end up missing an interrupt, especially 
under heavy load.

If part of qemu gets swapped out then all bets are off, and you can easily 
stall for significant fractions of a second. No amount of host high 
resolution time support will help you there.

Paul