On 25/04/22 20:05, Thomas Gleixner wrote: > On Mon, Apr 25 2022 at 16:15, Adrian Hunter wrote: >> On 25/04/22 12:32, Thomas Gleixner wrote: >>> It's hillarious, that we still cling to this pvclock abomination, while >>> we happily expose TSC deadline timer to the guest. TSC virt scaling was >>> implemented in hardware for a reason. >> >> So you are talking about changing VMX TCS Offset on every VM-Entry to try to hide >> the time jumps when the VM is scheduled out? Or neglect that and just let the time >> jumps happen? >> >> If changing VMX TCS Offset, how can TSC be kept consistent between each VCPU i.e. >> wouldn't that mean each VCPU has to have the same VMX TSC Offset? > > Obviously so. That's the only thing which makes sense, no? [ Sending this again, because I notice I messed up the email "From" ] But wouldn't that mean changing all the VCPUs VMX TSC Offset at the same time, which means when none are currently executing? How could that be done?
