• Interrupt Moderation
  • Performance Tuning Guidelines for Windows Server 2012 April 12, 2013 Abstract




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    Message-Signaled Interrupts (MSI/MSI-X)


    Network adapters that support MSI/MSI-X can target their interrupts to specific logical processors. If the adapters also support RSS, then a logical processor can be dedicated to servicing interrupts and deferred procedure calls (DPCs) for a given TCP connection. This preserves the cache locality of TCP structures and greatly improves performance.

    Interrupt Moderation


    To control interrupt moderation, some network adapters expose different interrupt moderation levels, or buffer coalescing parameters (sometimes separately for send and receive buffers), or both. You should consider buffer coalescing or batching when the network adapter does not perform interrupt moderation. Interrupt moderation helps reduce overall CPU utilization by minimizing the per-buffer processing cost, but the moderation of interrupts and buffer batching can have a negative impact on latency-sensitive scenarios.


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    Performance Tuning Guidelines for Windows Server 2012 April 12, 2013 Abstract

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