On Sat, 13 Oct 2007 20:30:52 -0700, Paul Pluzhnikov wrote: > skaller <[EMAIL PROTECTED]> writes: > >> So which version of g++ first provides openmp support? > > From http://gcc.gnu.org/gcc-4.2/changes.html: > OpenMP is now supported for the C, C++ and Fortran compilers.
hum ... well I tried this on my amd64x2 machine. A test case for LU decomposition, dimension 800: 1 thread: 4.7 seconds 2 threads: 13 seconds Well then I discovered the stupid program was using 'clock()' function. Which counts the time for BOTH processors! So I used the time command .. and the threaded version is STILL slower. BTW: running Linux rt patched kernel.. -- John Skaller <skaller at users dot sf dot net> Try Felix, the successor to C++ http://felix.sf.net _______________________________________________ help-gplusplus mailing list help-gplusplus@gnu.org http://lists.gnu.org/mailman/listinfo/help-gplusplus
