What Q0 mainly does is keeps a VMDBK out of the eligible list. SET QUICK DSP is the only externally available way of getting a guest into Q0. Hot-sho t and lock-shot are internal settings that indicate to the scheduler that t his VMDBK should not be delayed for some reason. For example, lock-shot mean s the VMDBK holds some lock and so we don't want to hold dispatch of that VMDBK up in the eligible list since there might be other threads queued u p on the lock waiting for this one to release it. If that would happen, al l of those other threads would be hung up until the one holding the lock ge ts out of e-list limbo. Similarly, hot-shot gives the user a brief boost because the user interacted with its terminal and we want to give the interactive user a little preference. We don't want the user in the eligible list during this brief boost.
Mark Lorenc CP Development
