On Fri, Aug 7, 2009 at 09:20, Salatiel Filho<salatiel.filho@xxxxxxxxx> wrote:
> 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.
>
>>
>>
Here :
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 256M 2050 7 1209 3 2959 4
138.8 3
serpent,256M,,,2050,7,1209,3,,,2959,4,138.8,3,,,,,,,,,,,,,
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 625 2 445 1 1455 2
113.5 3
aes,256M,,,625,2,445,1,,,1455,2,113.5,3,,,,,,,,,,,,,
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> 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".
>
--
[]'s
Salatiel
"O maior prazer do inteligente é bancar o idiota
diante de um idiota que banca o inteligente".
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