RSS Indirection Table not updated for miniport driver newly added cpus

NTDEV
1

Hi All,
New cpu is added during runtime. NDIS miniport calls flow for PNP state machine looks fine.
Before adding cpu:

  • NDIS_RECEIVE_SCALE_CAPABILITIES updated with NumberOfReceiveQueues and NumberOfIndirectionTableEntries. Based on Active Cpus present. During NdisMSetMiniportAttributes.
  • OID_GEN_RECEIVE_SCALE_PARAMETERS SetInformation recieved with Indirection table for mapping. Maping recived for available queues

After adding cpu

  • NumberOfReceiveQueues updated to new queues based on newly added cpus during NdisMSetMiniportAttributes.
  • OID_GEN_RECEIVE_SCALE_PARAMETERS Indirection table shows old data mapping.

NDIS is expecting any params for RSS indirection table for newly added cpu?

PNP Call Flow for miniport during hot plug cpu:

ReceiverDisable: 1: <====> (Indicated = 913 Returned = 913)
MiniportPause: MiniportPause
MiniportHaltEx: MiniportHaltEx
AdapterSetGeneralAttributes: 1: RSS ENABLED (5 QUEUES)
MiniportInitializeEx: MiniportInitializeEx
MiniportDevicePnPEventNotify: <===>
AdapterQueryInformation: UNSUPPORTED OID 00010300
AdapterGetReceiveScaleParameters: NdisGroupActiveProcessorCount:5
AdapterGetReceiveScaleParameters: KeQueryActiveProcessorCountEx:5
OID_GEN_RECEIVE_SCALE_PARAMETERS Recieved with Old Indirection Table.
Indirection Flag also set for updated mapping by NDIS
AdapterQueryInformation: UNSUPPORTED OID 00010300
DisplayLinkState: 1: LINK: UP: SPEED=100000000000 DUPLEX=FULL
ReceiverEnable: 1: <====>
MiniportRestart: MiniportRestart

2

Dynamic CPU add/Runtime: CPU added for CPU number 5, MaxProcessor: [Group:Number] : 0:3 not updated until reboot.

PS C:\Users\Administrator> Get-NetAdapterRSS -Name "Ethernet 4"
Name : Ethernet 4
Enabled : True
NumberOfReceiveQueues : 5
Profile : NUMAStatic
BaseProcessor: [Group:Number] : 0:0
MaxProcessor: [Group:Number] : 0:3
MaxProcessors : 4
RssProcessorArray: [Group:Number/NUMA Distance] : 0:0/0 0:1/0 0:2/0 0:3/0
IndirectionTable: [Group:Number]: 0:0 0:1 0:2 0:3 0:0 0:1 0:2 0:3
0:0 0:1 0:2 0:3 0:0 0:1 0:2 0:3
0:0 0:1 0:2 0:3 0:0 0:1 0:2 0:3
0:0 0:1 0:2 0:3 0:0 0:1 0:2 0:3
0:0 0:1 0:2 0:3 0:0 0:1 0:2 0:3
0:0 0:1 0:2 0:3 0:0 0:1 0:2 0:3
0:0 0:1 0:2 0:3 0:0 0:1 0:2 0:3
0:0 0:1 0:2 0:3 0:0 0:1 0:2 0:3
0:0 0:1 0:2 0:3 0:0 0:1 0:2 0:3...

After Reboot:
PS C:\Users\Administrator> Get-NetAdapterRSS -Name "Ethernet 4"
Name : Ethernet 4
Enabled : True
NumberOfReceiveQueues : 5
Profile : NUMAStatic
BaseProcessor: [Group:Number] : 0:0
MaxProcessor: [Group:Number] : 0:4
MaxProcessors : 4
RssProcessorArray: [Group:Number/NUMA Distance] : 0:0/0 0:1/0 0:2/0 0:3/0 0:4/0
IndirectionTable: [Group:Number] : 0:0 0:1 0:2 0:4 0:0 0:1 0:2 0:4
0:0 0:1 0:2 0:4 0:0 0:1 0:2 0:4
0:0 0:1 0:2 0:4 0:0 0:1 0:2 0:4
0:0 0:1 0:2 0:4 0:0 0:1 0:2 0:4
0:0 0:1 0:2 0:4 0:0 0:1 0:2 0:4
0:0 0:1 0:2 0:4 0:0 0:1 0:2 0:4