xdlutime results

Yoon Jae Ho yoon at bh.kyungpook.ac.kr
Wed Sep 13 20:49:27 EDT 2000


In the lutimer.f file

      PROGRAM DLUTIMER
*
*     Simple Timing Program for ScaLAPACK routine for LU factiorization
*     and solver
*
*     The program must be driven by a short data file. The name of
*     the data file is 'LU.dat'. An annotated example of a data
*     file can be obtained by deleting the first 6 characters from
*     the following 5 lines: (The number in the first line is the
*     number of different problems the user wants to test. If it
*     is 'n', the user should input exactly 'n' numbers in each line
*     after. Also, this program will use the first column of N, NB,
*     P, Q to do the first test, second column of N, NB, P, Q to do
*     the second test, etc.)
*     2                 number of problems sizes
*     500 600           values of N (N x N square matrix)
*     64 64             values of NB
*     2 2               values of P
*     2 2               values of Q
*
*     .. Parameters ..
      INTEGER            CSRC, DBLESZ, INTGSZ, TOTMEM, MEMSIZ, NBRHS,
     $                   NOUT, NRHS, NTESTS, RSRC, CSRC_, DLEN_, LLD_,
     $                   M_, MB_, N_, NB_, RSRC_
      PARAMETER          ( CSRC = 0, DBLESZ = 8, INTGSZ = 4,
     $                   TOTMEM = 40000000, MEMSIZ = TOTMEM / DBLESZ,


please change the above TOTMEM = 40000000 to big figure.

have a nice day 

from Yoon Jae Ho
Seoul,Korea

----- Original Message ----- 
From: Camm Maguire <camm at enhanced.com>
To: Fredrik Augustsson <hamlet at cs.umu.se>
Cc: <pgeoffra at cs.utk.edu>; <beowulf at beowulf.org>
Sent: Wednesday, September 13, 2000 11:59 PM
Subject: Re: xdlutime results


> Greetings!  the scalapack testers have statically allocated arrays.
> TOTMEM is a paramater, and set to a small value by default, if memory
> serves.  Just edit and recompile.  The Debian scalapack-test package
> has this pre-adjusted to something more reasonable.
> 
> Take care,
> 
> Fredrik Augustsson <hamlet at cs.umu.se> writes:
> 
> > H!
> > I've tried to run the xdlutime to get an estimate for how well our
> > cluster performs, but I can only test small matrices. I have 8 dual PIII
> > with 512 MB of memory so would at least be abel to run tests on
> > 20000x20000, or am I wrong here?
> > 
> > Output ...
> > 
> > dumburk [~/pfs]$ mpirun -np 8 -npn 1 xdlutime
> > 
> > Simple Timer for ScaLAPACK routine PDGESV
> > Number of processors used:   8
> > 
> > TIME     N  NB   P   Q  LU Time   Sol Time  MFLOP/S Residual  CHECK
> > ---- ----- --- --- --- --------- --------- -------- -------- -------
> > Unable to perform LU-solve: need TOTMEM of at least  325494408
> > Bad MEMORY parameters: going to next test case.
> > 
> > 
> > + Fredrik 
> > 
> > 
> > 
> > 
> > On Tue, Sep 12, 2000 at 10:56:38PM -0400, Patrick GEOFFRAY wrote:
> > > Putchong Uthayopas wrote:
> > > 
> > > > Below are our results. The machines is 8 Athlon 550MHz and one 1Ghz Athlon.
> > > > 512 Mb memory each. and Myrinet.
> > > 
> > > > WALL 6000 9 1 9 116.80 0.41 1229.04 0.001097 PASSED
> > > > 
> > > > WALL 6000 9 9 1 200.79 3.65 704.66 0.001926 PASSED
> > > 
> > > Hi,
> > > 
> > > it seems that you are far from what you can get from your cluster
> > > !
> > > * First, 9 nodes is not a good idea, the (1*9) or (9*1) grids are
> > > bad. you should use only 8 nodes and try (2*4) and (4*2) grids,
> > > much better.
> > > * Then 6000 is not a big matrix. If you have 512 MB per node, you
> > > should go up to 20000. It will run longuer but you will be closest
> > > to the peak.
> > > * Which Blas do you use ? Atlas gives a DGEMM peak at 600 MFlops
> > > per Athlon, so you can hope about 4 GFlops on your cluster.
> > > * Which MPI do you use ? if it's MPICH-GM, do you use the
> > > -gm-can-register-memory flag ?
> > > 
> > > I strongly advice you to use the new High Performance Linpack
> > > (HPL) benchmark form Antoine Petitet
> > > (http://www.netlib.org/benchmark/index.html), it's faster than the
> > > old Linpack and much easier to install.
> > > 
> > > Hope it can help.
> > > regards.
> > > 
> > > Patrick Geoffray
> > > ---
> > > Aerospatiale Matra - Sycomore
> > > Universite Lyon I - RESAM
> > > http://lhpca.univ-lyon1.fr
> > > 
> > > _______________________________________________
> > > Beowulf mailing list
> > > Beowulf at beowulf.org
> > > http://www.beowulf.org/mailman/listinfo/beowulf
> > 
> > _______________________________________________
> > Beowulf mailing list
> > Beowulf at beowulf.org
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> > 
> > 
> 
> -- 
> Camm Maguire      camm at enhanced.com
> ==========================================================================
> "The earth is but one country, and mankind its citizens."  --  Baha'u'llah
> 
> _______________________________________________
> Beowulf mailing list
> Beowulf at beowulf.org
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