c++ - Call to operator new results in segmentation fault in MPI code -

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so following line in mpi code results in segfault:

mya = new double[nummyelements*numrows];

, nummyelements , numrows both int -s , none of them garbage. in test runs nummyelements*numrows = 235074 . line of code above gets called in constructor object , double* mya member of class. using:

g++ (ubuntu/linaro 4.6.3-1ubuntu5) 4.6.3 , mpirun (open mpi) 1.4.3

for running program 1 processor i.e. 

mpirun -np 1 ./program

on laptop.

the exact error following:

[user:03753] *** process received signal *** [user:03753] signal: segmentation fault (11) [user:03753] signal code:  (128) [user:03753] failing @ address: (nil)

after code hangs , have abort manually. don't think i'm running out of heap since when looking @ processes through top program uses 2.1% of memory.

however! interestingly enough if decrease size i.e. replace nummyelements*numrows small constant 10 or 100 don't error. can't go higher 1000. 

mya = new double[1000];

would result in same error again.

just in case ulimit -a output:

core file size          (blocks, -c) 0 data seg size           (kbytes, -d) unlimited scheduling priority             (-e) 0 file size               (blocks, -f) unlimited pending signals                 (-i) 31438 max locked memory       (kbytes, -l) 64 max memory size         (kbytes, -m) unlimited open files                      (-n) 1024 pipe size            (512 bytes, -p) 8 posix message queues     (bytes, -q) 819200 real-time priority              (-r) 0 stack size              (kbytes, -s) 8192 cpu time               (seconds, -t) unlimited max user processes              (-u) 31438 virtual memory          (kbytes, -v) unlimited file locks                      (-x) unlimited

does know going on here? thanks!

as mentioned in comments, turns out issue of incorrect array indexing unrelated error popped up. comments!


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