trying 2000 iterations read thread 1096182080 start write thread 1104574784 start write thread 1104574784 stop read thread 1096182080 stop Pass: all stats after completion of extending writes saw the new size Command exited with non-zero status 2 0.00user 0.06system 0:12.13elapsed 0%CPU (0avgtext+0avgdata 2944maxresident)k 72inputs+7008outputs (0major+215minor)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 0%CPU (0avgtext+0avgdata 1456maxresident)k 72inputs+56outputs (0major+113minor)pagefaults 0swaps 0.00user 0.03system 0:07.81elapsed 0%CPU (0avgtext+0avgdata 5824maxresident)k 24inputs+128000outputs (0major+396minor)pagefaults 0swaps 0.04user 0.46system 0:03.30elapsed 15%CPU (0avgtext+0avgdata 411072maxresident)k 2720inputs+207360outputs (1major+26003minor)pagefaults 0swaps 0.05user 0.48system 0:03.01elapsed 17%CPU (0avgtext+0avgdata 411056maxresident)k 0inputs+207360outputs (1major+26002minor)pagefaults 0swaps 0.04user 0.45system 0:03.30elapsed 15%CPU (0avgtext+0avgdata 411056maxresident)k 2560inputs+207360outputs (1major+26002minor)pagefaults 0swaps 0.04user 0.49system 0:03.07elapsed 17%CPU (0avgtext+0avgdata 411088maxresident)k 0inputs+207360outputs (1major+26004minor)pagefaults 0swaps 0.00user 0.04system 0:07.56elapsed 0%CPU (0avgtext+0avgdata 1696maxresident)k 24inputs+128000outputs (0major+136minor)pagefaults 0swaps 0.65user 1.04system 0:18.75elapsed 9%CPU (0avgtext+0avgdata 411056maxresident)k 298784inputs+409600outputs (1major+25784minor)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 0.96system 2:37.39elapsed 0%CPU (0avgtext+0avgdata 7104maxresident)k 24inputs+2560008outputs (0major+475minor)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... 0.97user 10.50system 1:22.87elapsed 13%CPU (0avgtext+0avgdata 132864maxresident)k 32inputs+5242968outputs (0major+164424minor)pagefaults 0swaps 0.00user 0.42system 0:02.92elapsed 14%CPU (0avgtext+0avgdata 1504maxresident)k 24inputs+192000outputs (0major+114minor)pagefaults 0swaps read_checkzero done 0.93user 9.49system 0:10.46elapsed 99%CPU (0avgtext+0avgdata 1232maxresident)k 16inputs+8outputs (0major+97minor)pagefaults 0swaps 0.00user 0.00system 0:00.05elapsed 5%CPU (0avgtext+0avgdata 3488maxresident)k 56inputs+784outputs (0major+239minor)pagefaults 0swaps 0.00user 0.00system 0:00.27elapsed 1%CPU (0avgtext+0avgdata 3504maxresident)k 8inputs+784outputs (0major+240minor)pagefaults 0swaps 0.00user 0.00system 0:00.20elapsed 0%CPU (0avgtext+0avgdata 3488maxresident)k 789inputs+792outputs (0major+239minor)pagefaults 0swaps