Am 17.03.2012 03:22, schrieb Ferosh Jacob: > Hi all > > I have an OpenMP program written in C and OpenMP, the program runs fine > for some sizes of data, > For bigger sizes it is throwing a segmentation fault, I tried setting > the ulimit -s 10000, unlimited, G/K/O, MP_STACKSIZE, variables but all > in vain. > > While running through valgrind this is not happening, the program > ends normally.
Probably your program has problems with with data races/locking, which do not appear (by luck_) in valgrind, as VG is serializing threads. Trying to mimicking the VG environment is probably not what you want: Why to parallelize a program which later is run only on just one core? The easier way is not to use OpenMP ;-) You can check for races/locking problems with the VG tools DRD and helgrind. Josef Below is the Valgrind summary. I believe if I can setup > the execution environment as in the Valgrind, my program will execute > normally. :) > Anyone knows where I can find this information, like the value of > variables set before executing a program in Valgrind. Please let me > know if you need more information. > > ==4506== > ==4506== HEAP SUMMARY: > ==4506== in use at exit: 1,764 bytes in 4 blocks > ==4506== total heap usage: 37,477 allocs, 37,473 frees, 7,095,680 > bytes allocated > ==4506== > ==4506== LEAK SUMMARY: > ==4506== definitely lost: 0 bytes in 0 blocks > ==4506== indirectly lost: 0 bytes in 0 blocks > ==4506== possibly lost: 152 bytes in 1 blocks > ==4506== still reachable: 1,612 bytes in 3 blocks > ==4506== suppressed: 0 bytes in 0 blocks > ==4506== Rerun with --leak-check=full to see details of leaked memory > ==4506== > ==4506== For counts of detected and suppressed errors, rerun with: -v > ==4506== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 19 from 6) > > > Thanks > Ferosh > > > > ------------------------------------------------------------------------------ > This SF email is sponsosred by: > Try Windows Azure free for 90 days Click Here > http://p.sf.net/sfu/sfd2d-msazure > _______________________________________________ > Valgrind-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/valgrind-users > ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Valgrind-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/valgrind-users
