MadGraph optimization

[magistros]

Dear forum,
I am new here, so hi to all!
I am using Madgraph to generate some events about exotic physics. The problem is that when I give this line
gg>(rho>(pip>j j)(pip>j j))(rho>(pip>j j)(pip>j j))
All these are declared in the particles.dat file.
The problem is that it takes too much time when I am trying the
./bin/newprocess
I left it working for 500 minutes and no results... It was saying:
Running....

So, I tried to make it smaller and it finished too fast! Do you have any idea, why it takes too much time? Is there any way making it use both cores???

[alwall]

Dear magistros,

It seems from your syntax as if you are using MadGraph 4. Please switch to MadGraph 5, which can do this type of processes in quite reasonable time. Always try to use the most up-to-date software, it can make a world of difference (you find some speed benchmarks in the MadGraph 5 release paper http://arxiv.org/abs/arXiv:1106.0522).

[alwall]

Addendum: Please note that in order for us to directly receive your questions regarding MadGraph, please post your questions at https://answers.launchpad.net/madgraph5 instead of Physicsforums.

All the best,
Johan

[magistros]

Dear Johan,
thank you for your reply.. I can not use MadGraph5 because the model I want to run is programmed for MadGraph4...
But I will ask for MadGraph5.

[alwall]

Dear Magistros,

Of course MadGraph 5 is fully backward compatible in terms of models.

All the best,
Johan