1. Jose E. Roman Avatar Jose E. Roman
  2. Untitled project
  3. blopex

Wiki

Clone wiki

blopex / PetscTestingCygwinDouble64

View History

Introduction

How to test BLOPEX under version 3.1 of Petsc on Cygwin in Windows 7, e.g., configured for 64bit integers and double.

Setup Petsc

To use blopex_solve_double or blopex_solve_complex using Petsc first download Petsc at http://ftp.mcs.anl.gov/pub/petsc/release-snapshots/petsc-lite-3.1-p3.tar.gz To install files issue command: 

>> tar -zxvf petsc-lite-3.1-p3.tar.gz
This creates files in directory petsc-3.1-p3. Switch to the Petsc directory and set PETSC_DIR environment variable. 
>> cd petsc-3.1-p3
>> export PETSC_DIR=$PWD
Start the configuration process as follows to configure for double and 64bit integers. The installation of mpich2 on windows under cygwin is the same as in Linux, please see http://www.mcs.anl.gov/research/projects/mpich2/documentation/files/mpich2-1.2.1-installguide.pdf 
>> ./config/configure. --with-f-blas-lapack=/cygdrive/c/cygwin/lib --with –mpich-dir=/cygdrive/c/cygwin/usr/local/bin/mpich2-install  --download-blopex=1 --with-64-bit-indices
Or if you haven’t installed mpich on Windows yet, you can use option --download-mpich=1 
>> ./config/configure. --with-f-blas-lapack=/cygdrive/c/cygwin/lib --download-mpich=1 --download-blopex=1 --with-64-bit-indices
The option --download-mpich=1 takes very long time. If you do not need MPI, replace it the option --with-mpi=0

After configuration is finished issue the command 

>> make all
>> make test

Setup blopex petsc drivers

Now create executables for the blopex drivers 

>> cd src/contrib/blopex/driver
>> make driver
>> cd ../driver_fiedler
>> make driver_fiedler
>> cd ../driver_diag
>> make driver_diag
>> cd ../driver_fortran
>> make ex2f_blopex

Execution of Tests

See wiki PetscTestingLinux for descriptions of test programs. There are 4 test drivers located in subdirectories of ../blopex: driver, driver_fiedler driver_diag, and driver_fortran.

Test Results

We document here tests for configuration double and 64bit

Configure for double 64bit

driver

./driver -n_eigs 3 -itr 20

Eigenvalues computed 

Eigenvalue lambda       Residual
  2.43042158313016e-01    2.06075489797594e-09
  4.79521039879647e-01    4.41011822871539e-09
  4.79521039879649e-01    7.25866549368105e-09
16 iterations
Solution process, seconds: 2.569786e-01

driver_fiedler L-matrix-double_64.petsc

driver_fiedler accepts as input matrices in Petsc format. These matrices must be setup for either 32bit or 64bit arithematic, ral or complex. The test matrices are setup for double (real) or complex and for 32bit or 64bit. The 64bit version have a file name containing "64"`. All our matrices for testing can be downloaded from http://code.google.com/p/blopex/downloads/detail?name=blopex_petsc_test.tar.gz

./driver_fiedler -matrix L-matrix-double_64.petsc -n_eigs 3 -itr 20

Eigenvalues computed 

Eigenvalue lambda       Residual
  3.24057229835491e-06    1.08379498003101e-09
  9.46022689455523e-06    2.33567983484665e-09
  2.01380536843911e-05    4.39095965249420e-09

14 iterations
Solution process, seconds: 5.487032e+02
Final eigenvalues:
3.240572e-06
9.460227e-06
2.013805e-05

driver_fiedler DL-matrix-double_64.petsc

./driver_fiedler -matrix DL-matrix-double_64.petsc -n_eigs 3 -itr 20

Eigenvalues computed 

Eigenvalue lambda       Residual
  4.02544378184729e-05    6.39420026735611e-06
  4.03050265235268e-05    2.16914540699202e-05
  4.06041171454049e-05    4.82871036680101e-05
20 iterations
Solution process, seconds: 2.433026e+00
Final eigenvalues:
4.025444e-05
4.030503e-05
4.060412e-05

driver_diag

./driver_diag -n_eigs 3 -tol 1e-6 -itr 20

Eigenvalues computed 

Eigenvalue lambda       Residual
  1.20073961755945e+00    2.12082900660306e+00
  2.23691202511820e+00    2.42856881925111e+00
  3.26199055636483e+00    2.63494491986278e+00
20 iterations
Solution process, seconds: 2.580865e-02
Final eigenvalues:
-9.290899e+260
-9.290899e+260
-9.290899e+260

driver_fortran

./ex2f_blopex

Solution: 

BLOPEX complete in  12 iterations
eval   1 is 0.205227064E-01 residual 0.1767E-07
eval   2 is 0.512014707E-01 residual 0.4715E-07
eval   3 is 0.512014707E-01 residual 0.2178E-06
eval   4 is 0.818802350E-01 residual 0.8697E-06
eval   5 is 0.101982840E+00 residual 0.4591E-06

Updated