Michael Brown
2016-Mar-03 09:36 UTC
[syslinux] "Tick-counting" vs "Tick-less" timekeeping issues on VMs emulating BIOS PCs
On 03/03/16 09:34, Patrick Masotta wrote:> > 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. > > It seems it's more that that even at the regular rate...At the BIOS standard rate of 18.2Hz, no modern machine is even going to notice. Michael
Patrick Masotta
2016-Mar-03 09:45 UTC
[syslinux] "Tick-counting" vs "Tick-less" timekeeping issues on VMs emulating BIOS PCs
>>>At the BIOS standard rate of 18.2Hz, no modern machine is even going to notice. Michael <<< I think they do when running a VM, That's why my Debian VM date is always indicating whatever, no matter how many times I reset the time of the day. (Running on a i7-3630QM host) For some reason they cannot emulate a good timer interrupt. Best, Patrick
Michael Brown
2016-Mar-03 09:52 UTC
[syslinux] "Tick-counting" vs "Tick-less" timekeeping issues on VMs emulating BIOS PCs
On 03/03/16 09:45, Patrick Masotta wrote:> > At the BIOS standard rate of 18.2Hz, no modern machine is even going to > > notice. > > I think they do when running a VM, > > That's why my Debian VM date is always indicating whatever, > no matter how many times I reset the time of the day. > (Running on a i7-3630QM host) > For some reason they cannot emulate a good timer interrupt.Your Linux guest will have reconfigured the timer interrupt to run faster than the BIOS standard rate of 18.2Hz. Michael
Possibly Parallel Threads
- "Tick-counting" vs "Tick-less" timekeeping issues on VMs emulating BIOS PCs
- "Tick-counting" vs "Tick-less" timekeeping issues on VMs emulating BIOS PCs
- "Tick-counting" vs "Tick-less" timekeeping issues on VMs emulating BIOS PCs
- "Tick-counting" vs "Tick-less" timekeeping issues on VMs emulating BIOS PCs
- "Tick-counting" vs "Tick-less" timekeeping issues on VMs emulating BIOS PCs