Hey, I've copied the files from the site and normally run them ( without mpi) these are the results:
------------------------------------------------------------- STREAM version $Revision: 5.10 $ ------------------------------------------------------------- This system uses 8 bytes per array element. ------------------------------------------------------------- Array size = 10000000 (elements), Offset = 0 (elements) Memory per array = 76.3 MiB (= 0.1 GiB). Total memory required = 228.9 MiB (= 0.2 GiB). Each kernel will be executed 10 times. The *best* time for each kernel (excluding the first iteration) will be used to compute the reported bandwidth. ------------------------------------------------------------- Your clock granularity/precision appears to be 1 microseconds. Each test below will take on the order of 15426 microseconds. (= 15426 clock ticks) Increase the size of the arrays if this shows that you are not getting at least 20 clock ticks per test. ------------------------------------------------------------- WARNING -- The above is only a rough guideline. For best results, please be sure you know the precision of your system timer. ------------------------------------------------------------- Function Best Rate MB/s Avg time Min time Max time Copy: 7446.0 0.021588 0.021488 0.021715 Scale: 7391.3 0.021783 0.021647 0.022007 Add: 8369.7 0.028749 0.028675 0.028826 Triad: 8407.8 0.028705 0.028545 0.028908 ------------------------------------------------------------- Solution Validates: avg error less than 1.000000e-13 on all three arrays ------------------------------------------------------------- Can someone give me an interpretation? Are those the results of the test you advised me? Thanks On Fri, Sep 12, 2014 at 6:54 PM, John Peterson <[email protected]> wrote: > On Fri, Sep 12, 2014 at 10:45 AM, Paul T. Bauman <[email protected]> > wrote: > > OPENMP/GOTOBLAS/OPENBLAS_NUM_THREADS=1? > > Oh... yeah, so I download fblaslapack from > http://ftp.mcs.anl.gov/pub/petsc/externalpackages/fblaslapack-3.4.2.tar.gz > > If the output of PETSc's 'make streams' depends strongly on BLAS, > that's probably why my results are shite. > > -- > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/libmesh-users > ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
