Date: Wed, 11 Aug 2004 16:33:17 +1000 From: David Burns <david.burns@dugeem.net> To: freebsd-performance@freebsd.org Subject: Re: Network performance issues when writing to disk (5.2.1-RELEASE) Message-ID: <4119BDAD.7030302@dugeem.net> In-Reply-To: <BD3EDC2E.42A6%erik.rothwell@realityengine.ca> References: <BD3EDC2E.42A6%erik.rothwell@realityengine.ca>
next in thread | previous in thread | raw e-mail | index | archive | help
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4119BDAD.7030302>