New API: Difference between revisions

Revision as of 00:30, 13 April 2015

Revision as of 21:50, 6 September 2015

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'''New API''' (also referred to as '''NAPI''') is an interface to use [[interrupt mitigation]] techniques for networking devices in the [[Linux kernel]]. Such an approach is intended to reduce the overhead of packet receiving. The idea is to defer incoming message handling until there is a sufficient amount of them so that it is worth handling them all at once.

Such an approach is intended to reduce the overhead of packet receiving. The idea is to defer incoming message handling until there is a sufficient amount of them so that it is worth handling them all at once.

==Motivation==

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==Compliant drivers==

A driver using the '''NAPI''' interface will work as follow :

* Packet receive interrupts are disabled.

* The driver provides a poll method to the kernel. That method will fetch all incoming packets available, on the network card or a [[Direct memory access|DMA]] ring, so that they will then be handled by the kernel.