Re: Network performance issues when writing to disk (5.2.1-RELEASE)
From: David Burns (david.burns_at_dugeem.net)
Date: 08/11/04
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Date: Wed, 11 Aug 2004 16:33:17 +1000 To: freebsd-performance@freebsd.org
Erik Rothwell wrote:
<snip>
>
> When writing to a file, however:
>
> # nc -l -p 2332 -vv | dd if=/dev/stdin of=/data/junk bs=1k
> listening on [any] 2332 ...
> connect to [192.168.5.1] from [192.168.5.3] 51296
> sent 0, rcvd 1130496
> 1046+115 records in
> 1046+115 records out
> 1130496 bytes transferred in 32.888345 secs (34374 bytes/sec)
>
You didn't mention what your hardware is... particularly disk IO
controller...
If ata you could verify your disk is in a DMA mode - with "atacontrol
mode 0" etc
One other possibility is PCI bus contention - particularly if the box
has some ancient PCI implementation and/or slow memory.
Regards,
David
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- Previous message: Erik Rothwell: "Network performance issues when writing to disk (5.2.1-RELEASE)"
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