On Nov 10 21:31:56, Michael wrote: > Hi, > > when using softraid crypto with OpenBSD 4.6-current I never get more > than ~10-11 MB/s disk writing speed even though the disk (WD Raptor 73 > GB) itself, without crypto, can do way more. > > What I see during transfer in top/systat is a high interrupt load, > however the interrupt load when writing to a not encrypted partition is > even higher and the speed faster, so that doesn't seem to be the issue. > > The crypto system process is shown as mostly bored in top. So, I am > wondering why softraid crypto never exceeds ~10-11 MB/s for me? > > Ideas are welcome. It would also be nice if someone could check the > speed with their own softraid crypto setups. > > To test the speed I downloaded a huge file (~3,5 GB) using FTP over gbit > ethernet. > > Write performance measured: > > to mfs partition: ~40 MB/s > to ffs partition: ~40 MB/s (doesn't matter if using softdep or not) > to softraid crypto partition: ~11 MB/s (+- 1 MB/s) > > Those 40 MB/s are limited due to the other systems read performance. > However, softraid crypto seems (unreasonably ?) slow to me.
Why do you even involve the network and some other system's read in evaluationg your softraid's write?
