[jave@node4 MGS2]$ time ./run_mgs2_dd 128 1024 1 6

real	0m3.264s
user	0m2.206s
sys	0m0.950s
[jave@node4 MGS2]$ time ./run_mgs2_dd 128 2048 1 6

real	0m21.214s
user	0m13.458s
sys	0m7.650s
[jave@node4 MGS2]$ time ./run_mgs2_dd 128 3072 1 6

real	1m8.450s
user	0m41.942s
sys	0m26.285s
[jave@node4 MGS2]$ 

