trying 2000 iterations read thread 1095424320 start write thread 1103817024 start write thread 1103817024 stop read thread 1095424320 stop Pass: all stats after completion of extending writes saw the new size Command exited with non-zero status 2 0.00user 0.15system 0:12.16elapsed 1%CPU (0avgtext+0avgdata 3168maxresident)k 88inputs+7008outputs (0major+236minor)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 0:07.06elapsed 1%CPU (0avgtext+0avgdata 5904maxresident)k 40inputs+128000outputs (0major+406minor)pagefaults 0swaps 0.06user 0.99system 0:02.86elapsed 37%CPU (0avgtext+0avgdata 411232maxresident)k 2720inputs+207360outputs (1major+26016minor)pagefaults 0swaps 0.10user 1.12system 0:02.21elapsed 55%CPU (0avgtext+0avgdata 411248maxresident)k 0inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.07user 0.96system 0:02.53elapsed 40%CPU (0avgtext+0avgdata 411232maxresident)k 2560inputs+207360outputs (1major+26016minor)pagefaults 0swaps 0.07user 0.93system 0:02.10elapsed 48%CPU (0avgtext+0avgdata 411232maxresident)k 0inputs+207360outputs (1major+26016minor)pagefaults 0swaps 0.00user 0.09system 0:07.12elapsed 1%CPU (0avgtext+0avgdata 1760maxresident)k 24inputs+128000outputs (0major+145minor)pagefaults 0swaps 3.47user 2.69system 0:17.12elapsed 36%CPU (0avgtext+0avgdata 411216maxresident)k 327592inputs+409600outputs (1major+25799minor)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 1.58system 2:21.93elapsed 1%CPU (0avgtext+0avgdata 7184maxresident)k 24inputs+2560008outputs (0major+483minor)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... 1.56user 20.22system 1:13.72elapsed 29%CPU (0avgtext+0avgdata 132992maxresident)k 32inputs+5242968outputs (0major+164465minor)pagefaults 0swaps 0.00user 0.65system 0:02.25elapsed 29%CPU (0avgtext+0avgdata 1632maxresident)k 24inputs+192000outputs (0major+126minor)pagefaults 0swaps read_checkzero done 1.14user 9.14system 0:10.33elapsed 99%CPU (0avgtext+0avgdata 1312maxresident)k 16inputs+8outputs (0major+106minor)pagefaults 0swaps 0.00user 0.00system 0:00.03elapsed 5%CPU (0avgtext+0avgdata 3616maxresident)k 32inputs+784outputs (0major+253minor)pagefaults 0swaps 0.00user 0.00system 0:00.23elapsed 2%CPU (0avgtext+0avgdata 3600maxresident)k 0inputs+784outputs (0major+252minor)pagefaults 0swaps 0.00user 0.00system 0:00.24elapsed 1%CPU (0avgtext+0avgdata 3616maxresident)k 789inputs+792outputs (0major+253minor)pagefaults 0swaps