CODEWITHSUNDEEP
network-programmingdpdk
xuxing chen
xuxing chen

Reputation: 99

How to enable scattered mode in DPDK?

I set the dataroom of the mbuf from 2048 to 64B. To receive large packets（>64B） with a 64B size dataroom mbuf, DPDK reminds me that I need to enable scattered mode. So how can I enable scattered mode? enter image description here

Upvotes: 1

Views: 754

Answers (1)

user10304260
user10304260

Reputation:

Rx scatter can be enabled at the stage when rte_eth_dev_configure() is invoked. To do that, one should pass flag RTE_ETH_RX_OFFLOAD_SCATTER via dev_conf.rx_mode.offloads, with dev_conf being passed by pointer as the last argument to rte_eth_dev_configure().

To check the feature with testpmd, one can pass command-line argument --enable-scatter.

Upvotes: 1

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