trying 2000 iterations read thread 1092208960 start write thread 1100601664 start write thread 1100601664 stop read thread 1092208960 stop Pass: all stats after completion of extending writes saw the new size Command exited with non-zero status 2 0.00user 0.15system 0:12.34elapsed 1%CPU (0avgtext+0avgdata 2976maxresident)k 56inputs+7008outputs (0major+238minor)pagefaults 0swaps Pass: faulty sync/aio dio writes give EFAULT and don't write garbage Command exited with non-zero status 2 0.00user 0.00system 0:00.19elapsed 0%CPU (0avgtext+0avgdata 1568maxresident)k 64inputs+56outputs (0major+126minor)pagefaults 0swaps 0.00user 0.13system 0:07.23elapsed 1%CPU (0avgtext+0avgdata 5888maxresident)k 32inputs+128000outputs (0major+406minor)pagefaults 0swaps 0.08user 0.86system 0:02.85elapsed 33%CPU (0avgtext+0avgdata 410752maxresident)k 2736inputs+207360outputs (1major+26016minor)pagefaults 0swaps 0.08user 0.89system 0:02.84elapsed 34%CPU (0avgtext+0avgdata 410752maxresident)k 0inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.07user 0.87system 0:02.92elapsed 32%CPU (0avgtext+0avgdata 410752maxresident)k 2560inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.13user 0.94system 0:03.26elapsed 33%CPU (0avgtext+0avgdata 410752maxresident)k 0inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.00user 0.13system 0:07.32elapsed 1%CPU (0avgtext+0avgdata 1760maxresident)k 24inputs+128000outputs (0major+144minor)pagefaults 0swaps 3.86user 2.61system 0:18.49elapsed 35%CPU (0avgtext+0avgdata 410720maxresident)k 328920inputs+409600outputs (1major+25797minor)pagefaults 0swaps dio_truncate: child reading file parent loop # 0 parent loop # 1 parent loop # 2 parent loop # 3 parent loop # 4 parent loop # 5 parent loop # 6 parent loop # 7 parent loop # 8 parent loop # 9 0.00user 2.62system 2:27.62elapsed 1%CPU (0avgtext+0avgdata 7184maxresident)k 24inputs+2560008outputs (0major+484minor)pagefaults 0swaps num_passes set to 10 Pass 1... num_passes set to 10 Pass 1... Pass 2... num_passes set to 10 Pass 1... Pass 2... Pass 3... num_passes set to 10 Pass 1... Pass 2... Pass 3... Pass 4... num_passes set to 10 Pass 1... Pass 2... Pass 3... Pass 4... Pass 5... num_passes set to 10 Pass 1... Pass 2... Pass 3... Pass 4... Pass 5... Pass 6... num_passes set to 10 Pass 1... Pass 2... Pass 3... Pass 4... Pass 5... Pass 6... Pass 7... num_passes set to 10 Pass 1... Pass 2... Pass 3... Pass 4... Pass 5... Pass 6... Pass 7... Pass 8... num_passes set to 10 Pass 1... Pass 2... Pass 3... Pass 4... Pass 5... Pass 6... Pass 7... Pass 8... Pass 9... num_passes set to 10 Pass 1... Pass 2... Pass 3... Pass 4... Pass 5... Pass 6... Pass 7... Pass 8... Pass 9... Pass 10... num_passes set to 10 Pass 1... Pass 2... Pass 3... Pass 4... Pass 5... Pass 6... Pass 7... Pass 8... Pass 9... Pass 10... 1.73user 19.09system 1:26.44elapsed 24%CPU (0avgtext+0avgdata 132992maxresident)k 24inputs+5242968outputs (0major+164457minor)pagefaults 0swaps 0.00user 0.62system 0:02.75elapsed 22%CPU (0avgtext+0avgdata 1632maxresident)k 16inputs+192000outputs (0major+126minor)pagefaults 0swaps read_checkzero done 1.27user 9.17system 0:10.60elapsed 98%CPU (0avgtext+0avgdata 1296maxresident)k 16inputs+8outputs (0major+105minor)pagefaults 0swaps 0.00user 0.00system 0:00.03elapsed 15%CPU (0avgtext+0avgdata 3616maxresident)k 32inputs+784outputs (0major+253minor)pagefaults 0swaps 0.00user 0.00system 0:00.25elapsed 2%CPU (0avgtext+0avgdata 3616maxresident)k 0inputs+784outputs (0major+253minor)pagefaults 0swaps 0.00user 0.00system 0:00.21elapsed 1%CPU (0avgtext+0avgdata 3616maxresident)k 789inputs+792outputs (0major+253minor)pagefaults 0swaps