We have a few single CPU (54xx quad core)systems running Hyper-V and looking at the Hyper-V Logical Processer Total value in Perfmon its staying pretty much from 85% to 100% all day long. Perfomance is mostly ok with an occasional hesitation, but the biggest reason is we are trying to avoid doubling the cost of SPLA license by not adding the second CPU. Most motherboards we have only hold 16 gig to 24 gig memory and by adding a second CPU both will probably be less then 40% or 50%
Any problems keeping a 54xx or any CPU for that matter running flat out as long as its cooled OK?
The motherboard is staying at 69F and the CPU temp is LOW (Intel stopped checking temperature on their chips using numbers, at least in Supermicro MB's), my concern was more the context switching that occurs in a virtualized environment. If I max out the quad core CPU for a solid 10 minutes at 100% utilization will it cause any crashes. I can live with slower performance in each virtual guest, but I can't live with blue screens or total crashes.
Thought maybe someone out in virtualization land ran some tests and could answer the question of what happens to virtual guests when the CPU is maxed for any length of time. Since you really can't wear out the silicon it should not matter (other then slowing down all the virtual guests) but I would like to know for sure.