* Socket send-buffer auto-sizing
@ 2012-06-07 17:59 Ben Greear
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From: Ben Greear @ 2012-06-07 17:59 UTC (permalink / raw)
To: netdev
I'm continuing to test one-way tcp streams in 3.5.0-rc1 on
a wifi network.
When I do not specify a send buffer size, and thus use the kernel
defaults, max speed is about 77Mbps.
When I specify 512KB send-buffer, I get speeds up to 185Mbps.
When set to 1MB, I get about 198Mbps (and setting higher does not
increase the throughput after this).
This is without any 'delack' patches applied.
My question is: Should the kernel auto-tuner work better?
I seem to recall a comments from some years ago that applications
should no longer attempt to tune send/recv buffers because the kernel
was smart enough to get it at least mostly right.
Thanks,
Ben
--
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc http://www.candelatech.com
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2012-06-07 17:59 Socket send-buffer auto-sizing Ben Greear
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