Hi!
We have a PowerEdge R510 with 2xE5620 and 24GB of RAM running W2008 R2 Datacenter.
We ran a MIPS measuring tool which is using only one core sustained. We ran this tool on both host and inside W2008 R2 virtual machines.
We got best results on Host, but there is a problem:
1.) Occasionally the CPU processing speed drops by nearly exactly 60%. After several seconds it recovers.
2.) Sometimes it remains 60% slower and only occasional recovers.
Behaviour #1 is more common on Host and behavior #2 more common on the virtual machine.
Anybody knows what this could be? Hyper-V has NUMA disabled.
We are running live video transcoding on the server and sustained performance is very important.
Thanks!
Atmapuri