Date: Wed, 20 Dec 2006 08:16:50 -0200 From: JoaoBR <joao@matik.com.br> To: freebsd-stable@freebsd.org, Mark Kirkwood <markir@paradise.net.nz> Subject: Re: Cached file read performance with 6.2-PRERELEASE Message-ID: <200612200816.51043.joao@matik.com.br> In-Reply-To: <4589045C.1050206@paradise.net.nz> References: <45888C68.10305@paradise.net.nz> <200612200618.12826.joao@matik.com.br> <4589045C.1050206@paradise.net.nz>
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On Wednesday 20 December 2006 07:37, Mark Kirkwood wrote: > JoaoBR wrote: > > On Tuesday 19 December 2006 22:05, Mark Kirkwood wrote: > >> $ dd of=3D/dev/null if=3D/tmp/file bs=3D32k # read it > >> 819200000 bytes transferred in 1.801944 secs (454620117 bytes/sec) > > > > hum, look my releng_6: > > > > # dd of=3D/dev/null if=3D/c/c1/file bs=3D32k > > 819200000 bytes transferred in 0.896507 secs (913768635 bytes/sec) > > Hmm - so your machine reads memory twice as fast as mine, which is > great! but I'm not sure it actually shows anything useful ... let me > guess - a P4 with DDR or DDR2 memory??? maybe if we look a bit harder at > buffer cache performance you could get 1.2GB/s or more - wouldn't that > be a good thing? oh! if it is useful or not seems to be your call, you was the one who said= =20 linux is twice as fast as freebsd :) it's a dual-opteron with ddr400 I just compiled world with no tweaks and=20 standard newfs options if you're interested I send new results after completing my setup =2D-=20 Jo=E3o A mensagem foi scaneada pelo sistema de e-mail e pode ser considerada segura. Service fornecido pelo Datacenter Matik https://datacenter.matik.com.br
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