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Sleepless Example
[gby@gby gby]$ time ./test
0.00user 0.00system 0:05.00elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (74major+13minor)pagefaults 0swaps
[gby@gby gby]$ LD_PRELOAD=./sleepless.so time ./test
sleep less, do more.
0.00user 0.00system 0:02.00elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (90major+17minor)pagefaults 0swaps