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Alex Valiushko 330a17b7d7 net/batching: use vectored writes on Linux (#19054) ... On Linux batching.Conn will now write a vector of coalesced buffers via sendmmsg(2) instead of copying fragments into a single buffer. Scatter-gather I/O has been available on Linux since the earliest days (reworked in 2.6.24). Kernel passes fragments to the driver if it supports it, otherwise linearizes upon receiving the data. Removing the copy overhead from userspace yields up to 4-5% packet and bitrate improvement on Linux with GSO enabled: 46Gb/s 4.4m pps vs 44Gb/s 4.2m pps w/32 Peer Relay client flows. Updates tailscale/corp#36989 Change-Id: Idb2248d0964fb011f1c8f957ca555eab6a6a6964 Signed-off-by: Alex Valiushko <alexvaliushko@tailscale.com>		3 weeks ago
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conn.go	net/batching: clarify & simplify single packet read limitations	1 month ago
conn_default.go	net/{batching,udprelay},wgengine/magicsock: add SO_RXQ_OVFL clientmetrics	1 month ago
conn_linux.go	net/batching: use vectored writes on Linux (#19054)	3 weeks ago
conn_linux_test.go	net/batching: use vectored writes on Linux (#19054)	3 weeks ago