[Octave-bug-tracker] [bug #58381] Consistent crash on large memory operations

[anonymous]

Follow-up Comment #2, bug #58381 (project octave):

Sorry for the delay. GDB was not helpful. I have pasted it below. With the
unoptimized debug version being much slower than the -O3 release version, I
could see the memory usage rise slowly to 96% memory and 100% swap before the
swap daemon activated and killed Octave.


$ gdb octave
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Reading symbols from octave...
warning: File "/home/myname/src/octave/debug/.gdbinit" auto-loading has been
declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load".
To enable execution of this file add
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(gdb) run
Starting program: /usr/local/bin/octave 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
process 436859 is executing new program:
/usr/local/libexec/octave/7.0.0/exec/x86_64-pc-linux-gnu/octave-gui
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffd5839700 (LWP 436863)]
qt5ct: using qt5ct plugin
[New Thread 0x7fffd4927700 (LWP 436864)]
[New Thread 0x7fffcffff700 (LWP 436865)]
[New Thread 0x7fffcf7fe700 (LWP 436866)]
GNU Octave, version 7.0.0
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octave:1> arr = zeros(352e6, 5, "int16");
octave:2> arr = zeros(352e6, 5, "int16"); 
octave:2> for i = 1:5, arr(:,i) = randi(8500, size(arr,1),1); end
octave:3> whos
Variables visible from the current scope:

variables in scope: top scope

   Attr Name           Size                     Bytes  Class
   ==== ====           ====                     =====  ===== 
        arr    352000000x5                 3520000000  int16
        i              1x1                          8  double

Total is 1760000001 elements using 3520000008 bytes

octave:4> vvec = rand(1,1e4);
octave:5> whos
Variables visible from the current scope:

variables in scope: top scope

   Attr Name           Size                     Bytes  Class
   ==== ====           ====                     =====  ===== 
        arr    352000000x5                 3520000000  int16
        i              1x1                          8  double
        vvec           1x10000                  80000  double

Total is 1760010001 elements using 3520080008 bytes

octave:6> s = sortrows(vvec(mat));
error: 'mat' undefined near line 1, column 1
octave:7> s = sortrows(vvec(arr));
[Thread 0x7fffcf7fe700 (LWP 436866) exited]
[Thread 0x7fffcffff700 (LWP 436865) exited]
[Thread 0x7fffd4927700 (LWP 436864) exited]
[Thread 0x7fffd5839700 (LWP 436863) exited]

Program terminated with signal SIGKILL, Killed.
The program no longer exists.
(gdb) bt
No stack.
(gdb) 


Octave was configured with:

CFLAGS="-g" CXXFLAGS="-g" FFLAGS="-g" ../configure --enable-largefile
--enable-threads=posix --enable-64 --enable-openmp --enable-readline
--disable-jit --disable-java --enable-docs --enable-hg-id


The BLAS library is OpenBLAS, multithreaded.

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