Bugzilla – Bug 136787
Octave fails to do matrix operations
Last modified: 2006-02-01 17:54:58 UTC
If I try to do some simple matrix operations like A\b for 3x3 matrix, octave uses 99% of CPU and don't finish operation even after considerable time (5min). I also tried to compile it from source, but I get the same behavior. So the problem is probobaly due to one of the libraries on which octave depends(blas?). octave ver 2.1.71-2 all the octave dependancies are up to date
Please provide some sort of a backtrace here and any considerable output that is shown. You might use gdb and/or ltrace/strace. Also: please show us the exact input you have used so the problem can be reproduced. Thanks.
If you can provide the information ask for, please do so and reopen this report. For now it gets closed as a reminder.
A user having the very same problem on his suse10 i586 machine gave me this code snipplet for octave that will let octave work for a very long time allthough its a very simple task. octave -q A = rand(3,3); # erzeugt 3 x 3 Zufallsmatrix D = det(A); # Berechnet Determinante davon, dauert unter 10.0 ewig This will take at least more than 30 sec (thats when I stopped it). I tested it also on a suse10.0 x86_64 machine and here it completes in 0.5 sec. On the i586 machine (P4 3Ghz) there is no output or error message.
Fixed for 10.1.