Add support for null pmd (I/O emulation mode)

achimnol commented 9 years ago

Replace old-fashined emulation mode with null pmd. DPDK's null pmd has an option to copy the packet content from zero-initialized packet instance, but we need to create valid IP packets.

Things to do:

[x] Remove and clean up if-branches in the io loop.
[x] Move packet generation codes after rte_eth_rx_burst().
- Initialize randomized packets on start-up and just copy them in a round-robin fashion during runtime for minimal overheads.
[x] null pmd supports only a single RX/TX queue. Make separate emulation-mode configurations to adapt. (Or patch null pmd to support multiple dummy queues.)
[x] null pmd's NUMA node is initialized using the result of rte_socket_id() during device initialization. Patch it to get the node information from command line key-value arguments, like its packet size and copy options.

achimnol commented 9 years ago

Add ref: http://dpdk.org/ml/archives/dev/2015-July/021695.html

achimnol commented 8 years ago

Implemented as a fork of null pmd: void pmd in anlab-kaist/dpdk by @leeopop . Kudos to Keunhong! :+1:

ANLAB-KAIST / NBA

Add support for null pmd (I/O emulation mode) #14