Set_Time_Slice

Set_Time_Slice_Priority

include vmm.inc

mov eax, Flags ; status flags

mov ebx, VM ; VM handle

mov ecx, Foreground ; foreground priority

mov edx, Background ; background priority

VMMcall Set_Time_Slice_Priority

The Set_Time_Slice_Priority service sets the time-slice execution flags, and the foreground and background priorities for a specified virtual machine.

Parameters

Flags

Specifies status flags for the CB_VM_Status field in the virtual machine's control block. It can be one of the following values:

Value

Meaning

VMStat_Background	Background execution
VMStat_Exclusive	Exclusive execution
VMStat_High_Pri_Back	High-priority background execution

Specifies a handle identifying the virtual machine to change.

Foreground

Specifies the foreground time-slice priority. The high word must be 0.

Background

Specifies the background time-slice priority. The high word must be 0.

Return Value

The carry flag is clear if the service successfully sets the time-slice priority. Otherwise, the carry flag is set.

Comments

To change the time-slice priority, a virtual should retrieve the current time-slice priority using the Get_Time_Slice_Priority service, modify the returned values, and use the modified values as input parameters to this service.

Example

The following example assigns a virtual machine to the background:

mov ebx, [VM]

VMMcall Get_Time_Slice_Priority

or eax, VMStat_Background