NAPI: Revision history

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6 February 2023

  • curprev 19:3719:37, 6 February 2023Dank talk contribs 681 bytes +681 Created page with "The "New API" for Linux NIC drivers introduced around 2001, NAPI is initiated by a NIC's hardware interrupt, but then disables interrupts and polls the card for a period. This can significantly reduce the CPU load compared to a pure interrupt-driven solution. NAPI largely obsoletes the "interrupt coalescing" features of some NICs. It is strictly receive-side. ==The NAPI path== A NIC has some number of hardware RX queues, each of which is mapped to an interrupt number an..."