Re: [ns] Multi processor systems

[Debojyoti Dutta <ddutta@wins.hrl.com>]

Thats not a easy question ... depends on a what type of a multiproc
you have...... I think the best way to run simulations
parallely is to use a pvm like tool to spawn processes on different
machines on a cluster. Then you wont need to bother about number of
processors etc. 

Use pvm_spawn(....); as many times you want. this is good on a NoW .....
where there is a lack of a single system image. PVM can be found from the
ORNL site.

Debo

On Thu, 6 Jul 2000, Lloyd Wood wrote:

> On Thu, 6 Jul 2000, John Heidemann wrote:
> 
> > >On Thu, 6 Jul 2000, Mark Butler wrote:
> > >
> > >> I'm thinking of running NS on a multi-processor computer. 
> > >
> > >to what goal? the standard ns is single-threaded, so you're likely to
> > >load up a single processor and nothing else.
> > >
> > >I've had ns use 50% of the computing power of a dual-processor
> > >Sparc20, 25% of a 4-processor UltraSparc...
> > >...
> > 
> > While no single ns job will use multiple CPUs, running multiple
> > independent ns jobs is a fine way to make use of CPUs. 
> 
> ...local admin policy permitting.
> 
> L.
> 
> besides, how do you tell runq how many processors a machine has?
> 
> <L.Wood@surrey.ac.uk>PGP<http://www.ee.surrey.ac.uk/Personal/L.Wood/>
> 
>