[LAU] encryption and performance penalty

[David Christensen]

On 11/16/2014 12:13 AM, William Light wrote:
> Correction: Intel(R) Core(TM) i5-3320M CPU @ 2.60GHz

I guess the model on Amazon has an updated CPU (?).

 
http://ark.intel.com/products/64896/Intel-Core-i5-3320M-Processor-3M-Cache-up-to-3_30-GHz?q=Intel%C2%AE%20Core%E2%84%A2%20i5-3320M%20Processor%20%283M%20Cache,%20up%20to%203.30%20GHz%29


> will at ashland ~% dd if=/dev/urandom of=/dev/null bs=1M count=100
> 100+0 records in
> 100+0 records out
> 104857600 bytes (105 MB) copied, 5.68905 s, 18.4 MB/s

That's only marginally faster than my i7-2600S.  I wonder if your kernel 
is making use of your CPU's Secure Key feature?


What Linux distribution and kernel do you have?

     2014-11-16 14:57:26 dpchrist at i72600s ~
     $ cat /etc/debian_version
     7.7

     2014-11-16 14:57:30 dpchrist at i72600s ~
     $ uname -a
     Linux i72600s 3.2.0-4-amd64 #1 SMP Debian 3.2.63-2+deb7u1 x86_64 
GNU/Linux



David