David Malone writes:
> As Padraig mentioned, WiFi has pretty big per-packet overheads: you
> pay for two PHY headers, one for the packet and one for the MAC
> ACK. In 802.11b that can be an additional 192 or 384us in an overall
> cost of ~1400us for 1500 byte 802.11b packet. Naturally, this is
> much worse for small packets. I would guess that making sure that
> NFS sends big packets whenever possible is important. The large
> rsize and wsize should help with this, but you'll still get small
> requests followed by large responses - I don't think there is a lot
> you can do about this.
>> If any of your WiFi hardware supports putting two packets in one
> MAC frame (the Atheros drivers support this - I think they call it
> "fast frames" or somesuch), then that might help a bit. I've never
> tested this to see how effective it is.
>> We have some nice performance improvements to TCP over wireless,
> but mainly for the situation where you have multiple wireless
> clients. (Which reminds me, it might be worth turning the Linux
> frto stuff on, but YMMV).
sudo sysctl net.ipv4.tcp_frto=1
? I'll give it a go. (Worth turning on for all my wireless clients I'd
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