[jstarks]

Maybe this is true for AWS VMs that use Xen. I believe that Linux VMs on Azure do not have this problem, since they use the Hyper-V reference time page, which can be queried from the vDSO.

[robbjuly]

I believe newer generation AWS VMs, like C5, use kvm clock source now and not xen. On the older ones switching to tsc speeds up things.