Date: Sat, 5 Jun 2010 19:30:49 +0200 From: Max Laier <max@love2party.net> To: freebsd-hackers@freebsd.org Cc: Adam PAPAI <wooh@wooh.hu>, freebsd-questions@freebsd.org Subject: Re: sysbench / fileio - Linux vs. FreeBSD Message-ID: <201006051930.49804.max@love2party.net> In-Reply-To: <4C09932B.6040808@wooh.hu> References: <4C09932B.6040808@wooh.hu>
next in thread | previous in thread | raw e-mail | index | archive | help
On Saturday 05 June 2010 01:58:35 Adam PAPAI wrote: > Why FreeBSD is supreme with 1 and 2 thread. And why is it 2 and 3 times > slower with 4-8-16-32 threads compared to Debian? The first two tests (1 > thread and 2 thread) showed me that FreeBSD is supreme in I/O, but later > tests showed me, that it can produce horrible I/O. > > How can I tune my disk to make it faster? Is it possible? What is the > reason of the really slow I/O with more than 4 threads? What do you > recommend me to do? Why is it damn slow with 8K blocksize? You may find this interesting: http://info.iet.unipi.it/~luigi/geom_sched/ Regards, Max
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201006051930.49804.max>