fastmm::net::XdpConfig Struct Reference

#include <fastmm/net/xdp_datagram_source.hpp>

Public Attributes
std::vector< XdpSubscription >	subscriptions
	line = index, at most 256
std::vector< XdpInterfaceQueues >	queues
	RX queues per interface.
std::uint32_t	frame_count = 4096
	UMEM frames per socket, power of two.
std::uint32_t	frame_size = 4096
	2048 or 4096 (at most the page size)
std::uint32_t	batch = 64
	RX descriptors per socket per poll.
XdpMode	mode = XdpMode::Auto
bool	busy_poll = false
	SO_PREFER_BUSY_POLL, SO_BUSY_POLL and SO_BUSY_POLL_BUDGET on every socket, and a recvfrom on every poll that finds the RX ring empty (drives NAPI from this thread).
int	busy_poll_usec = 20
int	busy_poll_budget = 64
bool	verify_udp_checksum = false
	IPv4 header and UDP checksums in user space (a zero UDP checksum is accepted).

Member Data Documentation

subscriptions

std::vector<XdpSubscription> fastmm::net::XdpConfig::subscriptions

line = index, at most 256

queues

std::vector<XdpInterfaceQueues> fastmm::net::XdpConfig::queues

RX queues per interface.

Unlisted: every RX queue the interface has once the program is attached (virtio_net, for one, adds queues for XDP and the host delivers on all of them).

frame_count

std::uint32_t fastmm::net::XdpConfig::frame_count = 4096

UMEM frames per socket, power of two.

frame_size

std::uint32_t fastmm::net::XdpConfig::frame_size = 4096

2048 or 4096 (at most the page size)

batch

std::uint32_t fastmm::net::XdpConfig::batch = 64

RX descriptors per socket per poll.

mode

XdpMode fastmm::net::XdpConfig::mode = XdpMode::Auto

busy_poll

bool fastmm::net::XdpConfig::busy_poll = false

SO_PREFER_BUSY_POLL, SO_BUSY_POLL and SO_BUSY_POLL_BUDGET on every socket, and a recvfrom on every poll that finds the RX ring empty (drives NAPI from this thread).

busy_poll_usec

int fastmm::net::XdpConfig::busy_poll_usec = 20

busy_poll_budget

int fastmm::net::XdpConfig::busy_poll_budget = 64

verify_udp_checksum

bool fastmm::net::XdpConfig::verify_udp_checksum = false

IPv4 header and UDP checksums in user space (a zero UDP checksum is accepted).