z/VM setting QUICKDSP

When the quick dispatch option is assigned to a virtual machine, that virtual machine is added to the dispatch list immediately, whenever it has work to do, without waiting in the eligible list.

Events can occur that cause the quick dispatch virtual machine to enter the dormant list. However, as soon as the quick dispatch virtual machine becomes dispatchable again, it enters the dispatch list without waiting in the eligible list.

Because the quick dispatch virtual machines are always in the set of virtual machines being dispatched when not in the dormant list, they avoid waiting in the eligible list with other machines that can spend time waiting in the eligible list.

The SET QUICKDSP command or the QUICKDSP operand of the OPTION directory statement assigns the QUICKDSP operand to a virtual machine.

All measurements were done with the QUICKDSP option on for all guests.