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Timing the Linear Equations Routines
The linear equation timing program is found in LAPACK/TIMING/LIN
and the input files are in LAPACK/TIMING.
Three input files are provided in each data type for timing the
linear equation routines, one for square matrices, one for band
matrices, and one for rectangular matrices. The small data sets for the REAL version
are stime_small.in, sband_small.in, and stime2_small.in, respectively,
and the large data sets are
stime_large.in, sband_large.in, and stime2_large.in.
The timing program for the least squares routines uses special instrumented
versions of the LAPACK routines to time individual sections of the code.
The first step in compiling the timing program is therefore to make a library
of the instrumented routines.
- a)
- To make a library of the instrumented LAPACK routines, first
go to LAPACK/TIMING/LIN/LINSRC and type make followed
by the data types desired, as in the examples of Section 5.3.
The library of instrumented code is created in
LAPACK/TIMING/LIN/linsrc_PLAT.a,
where PLAT is the user-defined architecture suffix specified in the
file LAPACK/make.inc.
- b)
- To make the linear equation timing programs,
go to LAPACK/TIMING/LIN and type make followed by the data
types desired, as in the examples in Section 5.3.
The executable files are called xlintims,
xlintimc, xlintimd, and xlintimz and are created
in LAPACK/TIMING.
- c)
- Go to LAPACK/TIMING and
make any necessary modifications to the input files.
You may need to set the minimum time a subroutine will
be timed to a positive value, or to restrict the size of the tests
if you are using a computer with performance in between that of a
workstation and that of a supercomputer.
The computational requirements can be cut in half by using only one
value of LDA.
If it is necessary to also reduce the matrix sizes or the values of
the blocksize, corresponding changes should be made to the
BLAS input files (see Section 6.7.2).
- d)
- Run the programs for each data type you are using.
For the REAL version, the commands for the small data sets are
- xlintims < stime_small.in > stime_small.out
- xlintims < sband_small.in > sband_small.out
- xlintims < stime2_small.in > stime2_small.out
or the commands for the large data sets are
- xlintims < stime_large.in > stime_large.out
- xlintims < sband_large.in > sband_large.out
- xlintims < stime2_large.in > stime2_large.out
Similar commands should be used for the other data types.
Next: Timing the BLAS
Up: Run the LAPACK Timing
Previous: Run the LAPACK Timing
Contents
Julie Langou
2007-02-26