Comment on Measuring Latency in Linux (2014)parentComments−jstarks6yMaybe 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.−robbjuly6yI 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.
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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.
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.