Luigi Rizzo wrote:
When testing without any extra delay on 'network' and send/recvspaces of
65535 bytes, we can sustain around 800mbit/s. The interrupts on
'network' may be the limiting factor here. However, when we set the
send/recv space to 65535*2, we can only sustain around 200-300mbit/s. It
have you checked that these two
kern.ipc.maxsockbuf: 262144
kern.ipc.sockbuf_waste_factor: 8
aren't responsible for the trouble ?
I've seen 200-300mbit when using a 1MB maxsockbuf. Raising it to 2, 4 or
8MB doesn't seem to have much (if any) effect. Altering
sockbuf_waste_factor doesn't seem to do anything, either.
However.. when I deleted the pipe rules on 'network', the speed suddenly
went up to around 800mbit/s too! I remade them, and voila, 200mbit/s.
So apparantly it's an issue in the dummynet configuration I have. So, to
reiterate:
On 'network':
pipe 1 from client to server via em0
pipe 2 from server to client via em1
allow ip from any to any
Will give me 200MBit/s when using 128KB window sizes, but 800MBit/s when
using 64KB window sizes.
On 'network':
allow ip from any to any
Will give me 800Mbit/s when using 64KB or 128KB window sizes. I haven't
configured the pipes in any way, though.
So it appears it's due to the 'network' box afterall..
--
Pieter
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