trying 2000 iterations read thread 1088170304 start write thread 1106008384 start write thread 1106008384 stop read thread 1088170304 stop Pass: all stats after completion of extending writes saw the new size Command exited with non-zero status 2 0.00user 0.16system 0:12.14elapsed 1%CPU (0avgtext+0avgdata 2960maxresident)k 56inputs+7008outputs (0major+235minor)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 0:00.08elapsed 1%CPU (0avgtext+0avgdata 1568maxresident)k 56inputs+56outputs (0major+126minor)pagefaults 0swaps 0.00user 0.09system 0:07.03elapsed 1%CPU (0avgtext+0avgdata 5888maxresident)k 24inputs+128000outputs (0major+405minor)pagefaults 0swaps 0.11user 1.15system 0:02.52elapsed 50%CPU (0avgtext+0avgdata 410752maxresident)k 2720inputs+207360outputs (1major+26016minor)pagefaults 0swaps 0.10user 1.09system 0:02.39elapsed 50%CPU (0avgtext+0avgdata 410736maxresident)k 0inputs+207360outputs (1major+26016minor)pagefaults 0swaps 0.13user 1.14system 0:02.90elapsed 43%CPU (0avgtext+0avgdata 410752maxresident)k 2560inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.09user 1.13system 0:02.65elapsed 46%CPU (0avgtext+0avgdata 410752maxresident)k 0inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.00user 0.08system 0:07.01elapsed 1%CPU (0avgtext+0avgdata 1792maxresident)k 24inputs+128000outputs (0major+146minor)pagefaults 0swaps 2.50user 2.63system 0:21.34elapsed 24%CPU (0avgtext+0avgdata 410720maxresident)k 340888inputs+409600outputs (1major+25798minor)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 1.93system 2:20.40elapsed 1%CPU (0avgtext+0avgdata 7200maxresident)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... 2.06user 22.33system 1:10.82elapsed 34%CPU (0avgtext+0avgdata 132992maxresident)k 24inputs+5242968outputs (0major+164466minor)pagefaults 0swaps 0.00user 0.66system 0:02.51elapsed 26%CPU (0avgtext+0avgdata 1632maxresident)k 16inputs+192000outputs (0major+126minor)pagefaults 0swaps read_checkzero done 1.10user 10.79system 0:11.94elapsed 99%CPU (0avgtext+0avgdata 1312maxresident)k 16inputs+8outputs (0major+106minor)pagefaults 0swaps 0.00user 0.00system 0:00.02elapsed 17%CPU (0avgtext+0avgdata 3600maxresident)k 32inputs+784outputs (0major+252minor)pagefaults 0swaps 0.00user 0.00system 0:00.25elapsed 2%CPU (0avgtext+0avgdata 3600maxresident)k 0inputs+784outputs (0major+252minor)pagefaults 0swaps 0.00user 0.00system 0:00.21elapsed 1%CPU (0avgtext+0avgdata 3616maxresident)k 789inputs+792outputs (0major+253minor)pagefaults 0swaps