[LAU] encryption and performance penalty

Roger gurusonic at gmail.com
Mon Nov 17 00:53:53 UTC 2014


On 17/11/14 10:00, David Christensen wrote:
> On 11/16/2014 12:13 AM, William Light wrote:
>> Correction: Intel(R) Core(TM) i5-3320M CPU @ 2.60GHz...
>
>> 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
>
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> Linux-audio-user at lists.linuxaudio.org
> http://lists.linuxaudio.org/listinfo/linux-audio-user
>
Interesting. Similar to my unencrypted Core2Duo.

roger at brain:~$ dd if=/dev/urandom of=/dev/null bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 5.5929 s, 18.7 MB/s

roger at brain:~$ inxi -b
System:    Host: brain Kernel: 3.17-2.towo-siduction-amd64 x86_64 (64 
bit) Desktop: KDE 4.14.2
            Distro: siduction 13.2.0 December - kde - (201312310241)
Machine:   Mobo: Gigabyte model: EP45-UD3R v: x.x Bios: Award v: F3 
date: 09/18/2008
CPU:       Dual core Intel Core2 Duo E8500 (-MCP-) speed/max: 2000/3166 MHz

This is not my DAW distro, which is a separate multiboot installation.

Cheers
Roger



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