Date: Thu, 21 Dec 2006 06:31:30 -0300 From: JoaoBR <joao@matik.com.br> To: freebsd-stable@freebsd.org, "O. Hartmann" <ohartman@zedat.fu-berlin.de> Cc: Mark Kirkwood <markir@paradise.net.nz> Subject: Re: Cached file read performance with 6.2-PRERELEASE Message-ID: <200612210631.31088.joao@matik.com.br> In-Reply-To: <4589128F.9030404@paradise.net.nz> References: <45888C68.10305@paradise.net.nz> <200612200816.51043.joao@matik.com.br> <4589128F.9030404@paradise.net.nz>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wednesday 20 December 2006 07:38, Mark Kirkwood wrote: > I was however trying to point out that as your machine is different from > mine (opteron and ddr*400* as opposed to PIII and pc133), the fact that > it is faster is not telling us anything about whether releng_6 > performance on cached file reads could be improved! > > In fact if you note that the PIII HW *can* actually do 700MB/s, it > suggests that your HW is capable of considerably more than 900MB/s - > given that opteron's have excellent cpu to memory bandwidth, and the > speed of your memory! I am not convinced that this kind of test is of any value for comparing=20 systems at all because there are too much factors involved - unless the=20 competitors are installed on identical hardware. On the other side I think = it=20 is usefull to compare tweaked settings on a particular machine. For example= =20 you may change fsize/bsize of the filesystem or any other and can compare=20 this results then. =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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200612210631.31088.joao>