Integrity VM Threads

[Martin Kendall]

Folks, I'm a newbie to the subject.

Just trying to get my head around each virtual CPU (vCPU) running on a single thread which in turn runs on a physical CPU (pCPU). If I define a VM Guest with 4 vCPUs I understand that each vCPU will run on a distinct thread running on distinct pCPUs.

My question is this: If I defined 8 diferent VM Guests, each with a single vCPU, does this mean that there will be 2 threads running per pCPU ?

Many thanks

[melvyn burnard]

That is about right, each VM is "seen" on tehj VM host as a separate thread

[Martin Kendall]

Hi Melvyn,

Do you know if there is some sort of "clever" thread allocation rule. For example, if I defined 9 VM Guests instead of 8, which pCPU will run the 9th thread.

[Gene Laoyan]

So then, If I have a vm with one vCPU on an nPar with 4 physical CPU's, does the workload of the one vCPU get distributed to all 4 physical CPU's?

[Martin Kendall]

Gene,

I have since discovered that it is all based on a single thread per vCPU which in turn can be assigned to any single one of the underlying pCPUs (currently, this may change in future). The assignment is based on free CPU cycles available and all vCPU minimal entitlements being met.