run a job on both processors of a bi-processor xeon

Hi everybody,
I want to run a job on both processors of a bi-processor xeon
(2x1.7Go).
when I simply run the job like this:
prompt>./myjob
it runs only on one processor of 1.7Ghz. This takes a long time untill
the job is done!
Is there any simple bash command to do so ? or do I need an additional
parallelisation software like PVM, OpenMP or MPI ?
thanx

roberto wrote:
> Hi everybody,
> I want to run a job on both processors of a bi-processor xeon
> (2x1.7Go).
> when I simply run the job like this:
> prompt>./myjob
> it runs only on one processor of 1.7Ghz. This takes a long time untill
> the job is done!
> Is there any simple bash command to do so ? or do I need an additional
> parallelisation software like PVM, OpenMP or MPI ?
> thanx

Hi !

I want do the same with a 2x 3Ghz Xeon
prompt>john <a file>

how to do that ???

In article <(E-Mail Removed) >, roberto wrote:
> Hi everybody,
> I want to run a job on both processors of a bi-processor xeon
> (2x1.7Go).
> when I simply run the job like this:
> prompt>./myjob
> it runs only on one processor of 1.7Ghz. This takes a long time untill
> the job is done!
> Is there any simple bash command to do so ? or do I need an additional
> parallelisation software like PVM, OpenMP or MPI ?
> thanx

You need to specifically program the application to take advantage
of >1 processors. Alternatively, you can run two instances and they'll
both run at full speed.

--
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University

teuf wrote:
> roberto wrote:
>
>> Hi everybody,
>> I want to run a job on both processors of a bi-processor xeon
>> (2x1.7Go).
>> when I simply run the job like this:
>> prompt>./myjob
>> it runs only on one processor of 1.7Ghz. This takes a long time untill
>> the job is done!
>> Is there any simple bash command to do so ? or do I need an additional
>> parallelisation software like PVM, OpenMP or MPI ?
>> thanx
>
>
> Hi !
>
> I want do the same with a 2x 3Ghz Xeon
> prompt>john <a file>
>
> how to do that ???
Compile your kernel and you'll see how the load is shared.
Or is it?

I think all next things depend on prev things and blah blah blah

Well...

On 18 Jan 2005 07:03:02 -0800, roberto <(E-Mail Removed)> wrote:
| Hi everybody,
| I want to run a job on both processors of a bi-processor xeon
| (2x1.7Go).
| when I simply run the job like this:
| prompt>./myjob
| it runs only on one processor of 1.7Ghz. This takes a long time untill
| the job is done!
| Is there any simple bash command to do so ? or do I need an additional
| parallelisation software like PVM, OpenMP or MPI ?
| thanx


If very much depends on how the program you run was written.

If the program only uses 1 logic thread (as most simple programs do)
then it can only be run on 1 processor. If it was written using threads
or seperate processes, then it can take advantage of 1 processor per
thread/process.


--
Reverend Paul Colquhoun, ULC. http://andor.dropbear.id.au/~paulcol
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