[pymvpa] running pyMVPA in the virtual unix

[Yaroslav Halchenko]

just want to complement with a typical runtime on regular Linux boxes

1. few years old, but it was quite fast when we bought it:

*$> time doc/examples/start_easy.py
Error for 12-fold cross-validation on 2-class problem: 0.055556

real    0m4.406s
user    0m3.688s
sys     0m0.428s


Taking into account that importing of everything from mvpa.suite takes:

$> time python -c "from mvpa.suite import *;"

real    0m3.311s
user    0m1.448s
sys     0m0.348s

so, computation itself seems to run for no more than few seconds.

I've ran it under Debian GNU/Linux etch (with a set of backports). Box
is 

$> uname -a
Linux node27 2.6.18-4-amd64 #1 SMP Fri May 4 00:37:33 UTC 2007 x86_64 GNU/Linux

dual dual core with 12GB of RAM.

2. somewhat dated i686 box (probably 5 years old) 

*$> time doc/examples/start_easy.py 
Error for 12-fold cross-validation on 2-class problem: 0.055556

real    0m13.235s
user    0m12.285s
sys     0m0.836s

$> time python -c 'from mvpa.suite import *'

real    0m7.275s
user    0m6.488s
sys     0m0.636s


So "millage" might vary depending on many factors, and I bet virtualization can
only add-up to slowness.

On Wed, 17 Dec 2008, Michael Hanke wrote:

> What kind of hardware is the host machine for your VM?
> What settings are you using for your virtual machine (RAM, Diskspace,...)?
> Which version of Ubuntu are you running?
> What does 'uname -a' ran in a console inside the VM give you?
> What is 'extremely slow' in seconds (or minutes)? ;-)


> Michael
-- 
Yaroslav Halchenko
Research Assistant, Psychology Department, Rutgers-Newark
Student  Ph.D. @ CS Dept. NJIT
Office: (973) 353-1412 | FWD: 82823 | Fax: (973) 353-1171
        101 Warren Str, Smith Hall, Rm 4-105, Newark NJ 07102
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