On Fri, Jan 04, 2013 at 08:14:42PM +0100, Milan Broz wrote: > On 01/04/2013 07:55 PM, Romain Francoise wrote: > > Milan Broz <gmazyland@xxxxxxxxx> writes: > > > >> Any serious objections to not do that now? > > > > How does it compare to cbc in terms of (real-world) performance? > > It is slower but on recent systems it shouldn't not be bottleneck > (even with fast storage). > > I really prefer security to performance here. > > But anyway, there is now benchmark command to test it. > > An example (on my 3 year old Thinkpad x201 notebook with AES-NI): > > # Tests are approximate using memory only (no storage IO). > # Algorithm | Key | Encryption | Decryption > aes-cbc 128b 789.0 MiB/s 1899.0 MiB/s > aes-cbc 256b 595.0 MiB/s 1445.0 MiB/s > aes-xts 256b 572.0 MiB/s 571.4 MiB/s > aes-xts 512b 465.0 MiB/s 467.0 MiB/s > > (I think XTS got some more optimization in recent kernel, this is from 3.6.) > > You can try it yourself, just run "cryptsetup benchmark" with 1.6.0-rc1, > perhaps we will need some new FAQ entry here. Yes, I think so. I will write one. Arno -- Arno Wagner, Dr. sc. techn., Dipl. Inform., Email: arno@xxxxxxxxxxx GnuPG: ID: CB5D9718 FP: 12D6 C03B 1B30 33BB 13CF B774 E35C 5FA1 CB5D 9718 ---- One of the painful things about our time is that those who feel certainty are stupid, and those with any imagination and understanding are filled with doubt and indecision. -- Bertrand Russell _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
