Syslinux - Mar 2016 - "Tick-counting" vs "Tick-less" timekeeping issues on VMs emulating BIOS PCs

On 03/03/16 07:31, Patrick Masotta wrote:
> > The timer interrupt works fine in at least KVM, Xen, VMware, and
> > Hyper-V.  (I've tested iPXE in all of those virtual environments,
and
> > iPXE relies on the timer interrupt actually triggering a call to an
ISR
> > within the VM.)
>
> Well, that contradicts what the VMware document says.
How so?

Michael

>>>How so?

it says they cannot emulate the timer interrupt very well;
that's what I understood...

On 03/03/16 09:18, Patrick Masotta wrote:
>>>> How so?
>
> it says they cannot emulate the timer interrupt very well;
> that's what I understood...
If it's the VMware document I'm thinking of (titled "Timekeeping in
VMware Virtual Machines"), then the issue is that emulating the timer 
interrupt can cause a heavy load on the host if the guest timer is 
configured to run at a high rate.

Michael