Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / benchmark-1.1.1 / benchmark_dtmm.m

diff --git a/octave_packages/benchmark-1.1.1/benchmark_dtmm.m b/octave_packages/benchmark-1.1.1/benchmark_dtmm.m
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+% Copyright (C) 2008  Jaroslav Hajek <highegg@gmail.com>
+% 
+% This file is part of OctaveForge.
+% 
+% OctaveForge is free software; you can redistribute it and/or modify
+% it under the terms of the GNU General Public License as published by
+% the Free Software Foundation; either version 2 of the License, or
+% (at your option) any later version.
+% 
+% This program is distributed in the hope that it will be useful,
+% but WITHOUT ANY WARRANTY; without even the implied warranty of
+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+% GNU General Public License for more details.
+% 
+% You should have received a copy of the GNU General Public License
+% along with this software; see the file COPYING.  If not, see
+% <http://www.gnu.org/licenses/>.
+% 
+
+% function benchmark_dtmm (m, n, nvec)
+% description:
+% Dense transposed matrix-matrix and matrix-vector multiplication benchmark.
+% This is to test the "compound operators" feature introduced in Octave.
+%
+% arguments:
+% m = row dimension of matrices
+% n = col dimension of matrices
+% nvec = number of vector op repeats
+%
+% results:
+% time_tmm = Time for A'*B (A,B m-by-n matrices)
+% time_smm = Time for A'*A
+% time_mtm = Time for A*B' (A,B n-by-m matrices)
+% time_msm = Time for A*A'
+% time_tmv = Time for A'*v nvec-times (A m-by-n matrix)
+% ratio_tmv = Ratio to precomputed transpose time
+% time_mtv = Time for v*A' nvec-times (A m-by-n matrix)
+% ratio_mtv = Ratio to precomputed transpose time
+%
+
+function results = benchmark_dtmm (m, n, nvec)
+
+  benchutil_default_arg ('m', 40192);
+  benchutil_default_arg ('n', 150);
+  benchutil_default_arg ('nvec', 100);
+
+  benchutil_initialize (mfilename)
+
+  A = rand (m, n);
+  B = rand (m, n);
+
+  tic; C = A'*B; time_tmm = toc;
+  benchutil_set_result ('time_tmm')
+
+  tic; C = A'*A; time_smm = toc;
+  benchutil_set_result ('time_smm')
+
+  A = A';
+  B = B';
+
+  tic; C = A*B'; time_mtm = toc;
+  benchutil_set_result ('time_mtm')
+
+  tic; C = A*A'; time_msm = toc;
+  benchutil_set_result ('time_msm')
+
+  A = A';
+
+  v = rand (m, 1);
+  tic;
+  for i=1:nvec
+    c = A'*v;
+  end
+  time_tmv = toc;
+  benchutil_set_result ('time_tmv')
+
+  B = A';
+  tic;
+  for i=1:nvec
+    c = B*v;
+  end
+  ratio_tmv = time_tmv / toc;
+  benchutil_set_result ('ratio_tmv')
+
+  v = rand (1, n);
+  tic;
+  for i=1:nvec
+    c = v*A';
+  end
+  time_mtv = toc;
+  benchutil_set_result ('time_mtv')
+
+  tic;
+  for i=1:nvec
+    c = v*B;
+  end
+  ratio_mtv = time_mtv / toc;
+  benchutil_set_result ('ratio_mtv')
+