[$] Accelerating networking with AF_XDP

Post Syndicated from corbet original https://lwn.net/Articles/750845/rss

The Linux network stack does not lack for features; it also performs well
enough for most uses. At the highest network speeds, though, any overhead
at all is too much; that has driven the most demanding users toward
specialized, user-space networking implementations that can outperform the
kernel for highly constrained tasks. The express data path (XDP)
development effort is an attempt win those users back, with some apparent
success so far. With the posting of the AF_XDP patch set by Björn Töpel,
another piece of the XDP puzzle is coming into focus.