GROUP_AFFINITY - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// miniport.h
typedef struct _GROUP_AFFINITY {
KAFFINITY Mask;
USHORT Group;
USHORT Reserved[3];
} GROUP_AFFINITY, *PGROUP_AFFINITY;
View the official Windows Driver Kit DDI reference// minitape.h
typedef struct _GROUP_AFFINITY {
KAFFINITY Mask;
WORD Group;
WORD Reserved[3];
} GROUP_AFFINITY, *PGROUP_AFFINITY;
View the official Windows Driver Kit DDI referenceNo description available.
The GROUP_AFFINITY structure specifies a group number and the processor affinity within that group.
MaskSpecifies the affinity mask. This parameter is a KAFFINITY value. The bits in the affinity mask identify a set of processors within the group identified by Group.
GroupSpecifies the group number. In Windows 7, the group number must be in the range from 0 to 3.
ReservedReserved for future use. Set all three Reserved array elements to zero.
This structure describes a group-specific affinity.
A GROUP_AFFINITY structure can describe a thread affinity, which is a set of processors on which a thread is allowed to run. All of the processors in this set belong to the group that is identified by the Group member of the structure. The Mask member contains an affinity mask that identifies the processors in the set. For example, the KeSetSystemGroupAffinityThread and KeRevertToUserGroupAffinityThread routines use GROUP_AFFINITY structures to specify thread affinities.
A GROUP_AFFINITY structure can describe an interrupt affinity, which is a set of processors on which an interrupt service routine can receive interrupts. For example, the IoGetDeviceNumaNode routine uses GROUP_AFFINITY structures to specify interrupt affinities.
KeRevertToUserGroupAffinityThread
KeSetSystemGroupAffinityThread
The GROUP_AFFINITY structure specifies a group number and the processor affinity within that group.
MaskSpecifies the affinity mask. This parameter is a KAFFINITY value. The bits in the affinity mask identify a set of processors within the group identified by Group.
GroupSpecifies the group number. In Windows 7, the group number must be in the range from 0 to 3.
ReservedReserved for future use. Set all three Reserved array elements to zero.
typedef struct _GROUP_AFFINITY {
KAFFINITY Mask;
WORD Group;
WORD Reserved[3];
} GROUP_AFFINITY, *PGROUP_AFFINITY;
This structure describes a group-specific affinity.
A GROUP_AFFINITY structure can describe a thread affinity, which is a set of processors on which a thread is allowed to run. All of the processors in this set belong to the group that is identified by the Group member of the structure. The Mask member contains an affinity mask that identifies the processors in the set. For example, the KeSetSystemGroupAffinityThread and KeRevertToUserGroupAffinityThread routines use GROUP_AFFINITY structures to specify thread affinities.
A GROUP_AFFINITY structure can describe an interrupt affinity, which is a set of processors on which an interrupt service routine can receive interrupts. For example, the IoGetDeviceNumaNode routine uses GROUP_AFFINITY structures to specify interrupt affinities.
KeRevertToUserGroupAffinityThread
KeSetSystemGroupAffinityThread