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? If the latter, you might want to use something like /dev/zero instead.
