Goal

• Poll mode is a must to have feature for Windows Server 2025 and it is verified by the HCK test suit for Window Server 2025
• https://drive.google.com/drive/folders/14Q9jNrBUYhDAQG8npwZFHLKKbv8xL55w?usp=sharing

Acceptance Criteria

Regular regression test on all the OSes

Acceptance test on Server 2025

Additionally - ensure that in Server 2025 the activation of Poll Mode happens as expected

• For Win10, 2016,2019,2022 there is no change expected - just a regression test
• For Win11 driver we add "*NdisPoll"="Ndis Poll Mode" parameter, possible values = 1/0 (Disable/Enable), the default is "Enable"
• On Win11 the behavior is not changed from previous build regardless "Ndis Poll Mode" setting - just a regression test
• The same Win11 driver goes to Server 2025 and poll mode is really enabled for Server 2025 only, under following conditions
  • Ndis Poll Mode Enabled
  • RSS is enabled (as it is by default)
  • "Maximum Number of RSS Queues" (16 by default)  >= effective number of virtio queues ("queues" parameter of netdev)
  • Example:  "Maximum Number of RSS Queues"=16, queues=4, number of CPUs - any -> poll mode enabled
  • Example: "Maximum Number of RSS Queues"=2, queues=4, number of CPUs = 4 -> poll mode disabled
  • Example: "Maximum Number of RSS Queues"=2, queues=4, number of CPUs = 2 -> poll mode enabled
  • Example: "Maximum Number of RSS Queues"=16, queues=32, number of CPUs = 20 -> poll mode disabled
  • Respective printout (on Win11 only)
    • "Poll mode tried and enabled" (Ndis Poll Mode = Enable and conditions met)
    • "Poll mode tried and disabled" (Ndis Poll Mode = Enable and conditions not met)