FreeBSD/src 3429c02 (r324937)sys/net iflib.c

Some cache related optimizations

1. prefetch 128 bytes of mbufs.
2. Re-order filling the pkt_info so cache stalls happen at the end
3. Define empty prefetch2cachelines() macro when the function isn't present.

Provides small performance improvments on some hardware

Reviewed by:    sbruno
Approved by:    sbruno (mentor)
Sponsored by:   Limelight Networks
Differential Revision:  https://reviews.freebsd.org/D12447
DeltaFile
+16-7sys/net/iflib.c
+16-71 files

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