Gigabit ethernet very slow.
Matthew D. Fuller
fullermd at over-yonder.net
Mon Jun 26 21:26:19 UTC 2006
On Mon, Jun 26, 2006 at 05:05:26PM +1000 I heard the voice of
Michael Vince, and lo! it spake thus:
> According to pftop (with modulate state rules) I am able to get
> about 85megs/sec when I don't have dd running. dd does indeed eats a
> fair amount of cpu (40%) on the AMD64 6-stable machine.
dd does ridiculously small (512 byte?) read/writes, so it's gotta do a
LOT of system calls and a lot of context switching when you don't give
it a bigger blocksize.
Matthew Fuller (MF4839) | fullermd at over-yonder.net
Systems/Network Administrator | http://www.over-yonder.net/~fullermd/
On the Internet, nobody can hear you scream.
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