Hi Wei-keng,
I think this has probably been fixed in 2.7.1 if you are able to try
that. I just tried to reproduce your problem using that version and
everything seemed to be Ok.
-Phil
Wei-keng Liao wrote:
I am running a simple MPI-IO program (attached) on PVFS 2.7.0.
When I set the environment variable MALLOC_CHECK_ to 1 or above, I got
error messages below: (No error if MALLOC_CHECK_ is not set and if file
name has "ufs:" prefix)
% mpicc -g pvfs2_bug.c -o pvfs2_bug
% setenv MALLOC_CHECK_ 3
% mpiexec -gdb -n 4 pvfs2_bug
malloc: using debugging hooks
malloc: using debugging hooks
1: malloc: using debugging hooks
2: malloc: using debugging hooks
0: malloc: using debugging hooks
3: malloc: using debugging hooks
1: malloc: using debugging hooks
2: malloc: using debugging hooks
0: malloc: using debugging hooks
3: malloc: using debugging hooks
0-3: (gdb) run /pvfs2/wkliao/testfile.dat
0-3: Continuing.
1:
1: Program received signal SIGSEGV, Segmentation fault.
1: 0x00000038a3872190 in _int_free (av=0x38a3b52980, mem=0x79b300)
1: at malloc.c:4663
1: 4663 unlink(nextchunk, bck, fwd);
1: (gdb) 1: (gdb) where
1: #0 0x00000038a3872190 in _int_free (av=0x38a3b52980, mem=0x79b300)
1: at malloc.c:4663
1: #1 0x00000038a3876693 in free_check (mem=0x79b300,
1: caller=<value optimized out>) at hooks.c:298
1: #2 0x00000038a3875ec7 in __libc_free (mem=0x0) at malloc.c:3590
1: #3 0x00000000004ea2cd in PINT_smcb_free ()
1: #4 0x0000000000486e84 in PINT_sys_release ()
1: #5 0x000000000048f4f1 in PVFS_sys_io ()
1: #6 0x0000000000444d54 in ADIOI_PVFS2_ReadContig ()
1: #7 0x000000000043cb64 in MPIOI_File_read ()
1: #8 0x0000000000408f8f in PMPI_File_read_at ()
1: #9 0x0000000000403e5d in main (argc=2, argv=0x7fff8b04d438) at
pvfs2_bug.c:29
1: (gdb)
---------------------------------------------------------------------------
pvfs2_bug.c
---------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <mpi.h>
/*----< main() >------------------------------------------------------------*/
int main(int argc, char **argv) {
int i, rank, np;
char buf[65536];
MPI_File fh;
MPI_Status status;
MPI_Offset offset;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &np);
if (argc != 2) {
if (rank == 0) fprintf(stderr,"Usage: %s filename\n",argv[0]);
MPI_Finalize(); return 1;
}
MPI_File_open(MPI_COMM_WORLD, argv[1], MPI_MODE_CREATE | MPI_MODE_RDWR,
MPI_INFO_NULL, &fh);
offset = rank * 65536;
for (i=0; i<65536; i++) buf[i] = '0'+rank;
MPI_File_write_at(fh, offset, buf, 65536, MPI_CHAR, &status);
offset = ((rank+1)%np) * 65536;
MPI_File_read_at(fh, offset, buf, 65536, MPI_CHAR, &status);
MPI_File_close(&fh);
MPI_Finalize();
return 0;
}
_______________________________________________
Pvfs2-users mailing list
[email protected]
http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users
_______________________________________________
Pvfs2-users mailing list
[email protected]
http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users
