On Fri, Sep 12, 2014 at 10:29 AM, Jed Brown <j...@jedbrown.org> wrote: > Rodrigo Broggi <rbrogg...@gmail.com> writes: >> Jed, >> I've installed PETSc through Ubuntu Software Center so there is no Makefile >> in my PETSC_DIR (or I am looking for in the wrong directory), and this is >> why I can't run the "make streams" command. > > Okay, you can download the PETSc source or just run the benchmark on the > STREAM website > > http://www.cs.virginia.edu/stream/ > >> ./result-opt on a linux-gnu-c-opt named rodrigo-HP-Pavilion-g6-Notebook-PC >> with 4 processors, by rodrigo Fri Sep 12 17:44:22 2014 >> Using Petsc Release Version 3.4.2, Jul, 02, 2013 > > It's running in parallel, just don't get any speedup because bandwidth > is the bottleneck.
This fancy Mac Pro computer I'm using has terrible memory bandwidth speedup beyond 3 procs... https://drive.google.com/file/d/0B9BK7pg8se_iMjNKdWdEcE1Iakk/edit?usp=sharing -- John ------------------------------------------------------------------------------ Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users
