Search found 4 matches

by antoniofetter
Fri Apr 12, 2013 12:02 am
Forum: ROMS Problems
Topic: Slow performance on SGI with Opterons
Replies: 6
Views: 7278

Re: Slow performance on SGI with Opterons

Hi Hugo,

I am using gfortran in both machines, same flags.

Thanks,
Antonio
by antoniofetter
Wed Apr 10, 2013 5:51 pm
Forum: ROMS Problems
Topic: Slow performance on SGI with Opterons
Replies: 6
Views: 7278

Re: Slow performance on SGI with Opterons

First thing I would check is that your process (oceanS) is not constantly switching cores on your machine. I don't know a good way to do this with oceanS but I would suggest compiling with Open MPI then run with one processor and enable the --bind-to-core (or equivalent memory affinity option for p...
by antoniofetter
Wed Apr 10, 2013 5:21 pm
Forum: ROMS Problems
Topic: Slow performance on SGI with Opterons
Replies: 6
Views: 7278

Re: Slow performance on SGI with Opterons

Dear Shchepet,

This is the default upwelling example that comes with ROMS. I have just compiled and run it, in both machines. It is just a benchmark test.

Thanks for your comment.
Best,

Antonio
by antoniofetter
Thu Apr 04, 2013 4:00 pm
Forum: ROMS Problems
Topic: Slow performance on SGI with Opterons
Replies: 6
Views: 7278

Slow performance on SGI with Opterons

I have been struggling with a benchmark problem with ROMS and maybe you can bring a different insight to this issue. I bought a SGI server to run ROMS in a modeling project. The server has four opteron processors with 16 core in each processor (2GHz) and has 256GB of RAM memory. I have complied and ...