Thanks to all for points.Now I'm dived in man pages :-) For disk there is a option for AHCI mode,but not possible on my laptop. I have Win in dual boot and they don't like AHCI heh. For urandom I'm reading man pages around it on Linux and OpenBSD to try find difference.
On Mon, Sep 28, 2009 at 4:15 PM, Daniel Melameth <dan...@melameth.com> wrote: > 2009/9/28 TomC!E! BodE>C!r <tomas.bod...@gmail.com>: >> when I try dd command I will get similar numbers : >> >> $ dd if=/dev/urandom of=test bs=1k count=1024 >> 1024+0 records in >> 1024+0 records out >> 1048576 bytes transferred in 6.798 secs (154233 bytes/sec) >> >> On my old desktop with Ubuntu I have about 1,7MB/s,my friends with >> Linux have from about 3 to 8MB/s,my friend with OpenBSD on server has >> about 50MB/s(of course totally different HW) and what's worse on same >> laptop I have about 33MB/s with OpenSolaris.Of course that this is not >> some magic test of speed,but it is visible how slow is it even when >> working with apps.I think that there is some problem but I can't find >> where.I tried to use SoftDependencies,turn off atime,I played with >> namei cache size and all without success.I'm reading trough man pages >> for drivers and so on,but can't find anything obvious. (same results >> are on amd64). Problem of chipset,disk,some option? > > Are you testing the speed of urandom or your HD? B If the latter, you > might want to use something like /dev/zero instead. > > -- http://www.openbsd.org/lyrics.html
