[parsec-users] Dedup Segmentation Fault with 128 threads

Sudhanshu Shukla sudhan345 at gmail.com
Fri Feb 11 06:39:34 EST 2011


Hi PARSEC users,

I am facing a segmentation fault while executing dedup kernel with 128
threads. The kernel work fine with smaller number of threads (tested with 64
& 32 threads). I do not have more information, than the console output (that
can be found at the end of the mail).

I would like to know if any of you have also found the same issue or this is
a problem in my environment.


Thanks

Sudhanshu Shukla


[PARSEC] [========== Running benchmark dedup ==========]
[PARSEC] Deleting old run directory.
[PARSEC] Setting up run directory.
[PARSEC] Unpacking benchmark input 'simmedium'.
media.dat
[PARSEC] Running 'time
/mnt/work/parsec-2.1/pkgs/kernels/dedup/inst/amd64-linux.gcc/bin/dedup -c -p
-f -t 128 -i media.dat -o output.dat.ddp':
[PARSEC] [---------- Beginning of output ----------]
/mnt/work/parsec-2.1/bin/parsecmgmt: line 936:  6593 Segmentation fault
/mnt/work/parsec-2.1/pkgs/kernels/dedup/inst/amd64-linux.gcc/bin/dedup -c -p
-f -t 128 -i media.dat -o output.dat.ddp

real    0m1.700s
user    0m1.950s
sys     0m0.640s
[PARSEC] [----------    End of output    ----------]
[PARSEC] Done.
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