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StorPortGetNodeAffinity2 function (storport.h)

  • Article

A miniport can call StorPortGetNodeAffinity2 to get the current multi-group processor affinity of the given NUMA node.

Syntax

ULONG StorPortGetNodeAffinity2(
  PVOID           HwDeviceExtension,
  ULONG           NodeNumber,
  PGROUP_AFFINITY GroupAffinities,
  USHORT          GroupAffinitiesCount,
  PUSHORT         GroupAffinitiesCountRequired
);

Parameters

HwDeviceExtension

[in] Pointer to the miniport's device extension.

NodeNumber

[in] The node number of the node to query.

GroupAffinities

[out] Pointer to an array of GROUP_AFFINITY structures that, upon success, receive a group number and the affinity mask of the identified group.

GroupAffinitiesCount

[in] The number of elements in the array that GroupAffinities points to. If the array is too small to hold the node affinity then STATUS_BUFFER_TOO_SMALL is returned and the number of elements required is returned in GroupAffinitiesRequired.

GroupAffinitiesCountRequired

[out] Pointer to a value that receives the number of group affinities required to represent the node affinity.

Return value

StorPortGetNodeAffinity2 returns STOR_STATUS_SUCCESS if the node affinity was queried successfully. Possible error return values include the following.

Return code Description
STOR_STATUS_INVALID_PARAMETER There is an invalid parameter, such as an invalid NodeNumber value.
STOR_STATUS_BUFFER_TOO_SMALL The supplied array is too small.
STOR_STATUS_UNSUCCESSFUL An error occurred for internal reasons.

Remarks

See the Remarks section of KeQueryNodeActiveAffinity2 for details.

Requirements

Requirement Value
Minimum supported client Windows 11, version 22H2
Header storport.h

See also

GROUP_AFFINITY