On Mon, Sep 08, 2008 at 10:19:41AM +0200, Mathieu SEGAUD wrote: > > I too would really like it if dm-crypt could use multiple cores. > > well, I don't think it would change anything, disk writes are not > cpu-bound but io-bound. It could not increase write speed as what really > counts here, is time waiting for io-completion. As it is some 1000 > magnitude longer than memory write times, which are some 1000 magnitude > longer than cpu register accesses, I do not think it would change > anything on throughput, ever. That's not even nearly true. For example, I have a three-disk raid system capable of something like 200 MB/sec throughput. Using dm-crypt practically limits it to around 80 MB/sec (on a Core 2 Quad) since that's the best one crypto thread can do. I can assure you I consistently see kcryptd taking 100% of one CPU when viewing the output of top. That's very much CPU bound. Sami --------------------------------------------------------------------- dm-crypt mailing list - http://www.saout.de/misc/dm-crypt/ To unsubscribe, e-mail: dm-crypt-unsubscribe@xxxxxxxx For additional commands, e-mail: dm-crypt-help@xxxxxxxx
