On Fri, Aug 7, 2009 at 09:16, Salatiel Filho<salatiel.filho@xxxxxxxxx> wrote: > On Thu, Aug 6, 2009 at 13:02, Salatiel Filho<salatiel.filho@xxxxxxxxx> wrote: >> On Thu, Aug 6, 2009 at 13:00, Salatiel Filho<salatiel.filho@xxxxxxxxx> wrote: >>> On Thu, Aug 6, 2009 at 12:24, Heinz Diehl<htd@xxxxxxxxxxxxxxxxx> wrote: >>>> On 06.08.2009, Henrik Theiling wrote: >>>> >>>>> Fascinating. I thought Serpent was universally the slowest of the >>>>> three big algorithms (AES/Rijndael, Twofish, Serpent) that was used if >>>>> you wanted highest security margins. Your speed test results come >>>>> quite unexpected for me... >>>> >>>> The question is: how has this been measured, and is it faster on both read >>>> and write operations? E.g. a simple "hdparm -tT /dev/xxx" is not sufficient. >>>> >>> I just encrypted the partition , put some random data there [i do not >>> care about write speed in this particular storage, it is just a NAS >>> (ARM 266 + 128RAM running debian lenny)], then drop_caches , export >>> the data using nfs, mount from another machine and copy that file. >>> Repeated the proccess using aes and using serpent. Serpent is much faster ... >>> I really don't know which cipher is/shouldbe faster, but serpent gives >>> me a great speed ... >>> >>>> How about a bonnie++ run, e.g. something like >>>> "bonnie++ -u htd:users -d /mnt/test -s 16016m -m liesel -n 16:100000:16:6" >> i will try to do this tonight. >> > > > I changed the bonnie parameters cause this machine is really slow and > it has only 128Mb RAM. Here are the results, which i'd be glad if > someone could explain then to me :) > > # bonnie++ -d /mnt -f -n0 -m serpent -s 250 > [ext4,cipher=serpent-cbc-essiv:sha256,size=256] > Using uid:1000, gid:1000. > Writing intelligently...done > Rewriting...done > Reading intelligently...done > start 'em...done...done...done... > Version 1.03d ------Sequential Output------ --Sequential Input- > --Random- > -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- > --Seeks-- > Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP > /sec %CP > serpent 250M 1607 5 910 3 2403 3 > 126.8 3 > serpent,250M,,,1607,5,910,3,,,2403,3,126.8,3,,,,,,,,,,,,, > > > > # bonnie++ -d /mnt -f -n0 -m aes -s 250 > [ext4,cipher=aes-cbc-essiv:sha256,size=256] > > Using uid:1000, gid:1000. > Writing intelligently...done > Rewriting...done > Reading intelligently...done > start 'em...done...done...done... > Version 1.03d ------Sequential Output------ --Sequential Input- > --Random- > -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- > --Seeks-- > Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP > /sec %CP > aes 256M 623 2 400 1 1319 1 > 116.2 3 > aes,256M,,,623,2,400,1,,,1319,1,116.2,3,,,,,,,,,,,,, > > > > I am going to redo the test , apparently i used 250M for serpent and 256M for aes ... repost results soon. > > > > > > > > > > > >>>> >>>> >>>> >>>> _______________________________________________ >>>> dm-crypt mailing list >>>> dm-crypt@xxxxxxxx >>>> http://www.saout.de/mailman/listinfo/dm-crypt >>>> >>> >>> >>> >>> -- >>> []'s >>> Salatiel >>> >>> "O maior prazer do inteligente é bancar o idiota >>> diante de um idiota que banca o inteligente". >>> >> >> >> >> -- >> []'s >> Salatiel >> >> "O maior prazer do inteligente é bancar o idiota >> diante de um idiota que banca o inteligente". >> > > > > -- > []'s > Salatiel > > "O maior prazer do inteligente é bancar o idiota > diante de um idiota que banca o inteligente". > -- []'s Salatiel "O maior prazer do inteligente é bancar o idiota diante de um idiota que banca o inteligente". _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
