trying 2000 iterations read thread 1112418624 start write thread 1088403776 start write thread 1088403776 stop read thread 1112418624 stop Pass: all stats after completion of extending writes saw the new size Command exited with non-zero status 2 0.00user 0.15system 0:12.73elapsed 1%CPU (0avgtext+0avgdata 2976maxresident)k 88inputs+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 0:00.22elapsed 0%CPU (0avgtext+0avgdata 1568maxresident)k 56inputs+56outputs (0major+126minor)pagefaults 0swaps 0.00user 0.09system 0:07.05elapsed 1%CPU (0avgtext+0avgdata 5904maxresident)k 56inputs+128000outputs (0major+407minor)pagefaults 0swaps 0.08user 0.96system 0:02.76elapsed 37%CPU (0avgtext+0avgdata 410736maxresident)k 2744inputs+207360outputs (1major+26015minor)pagefaults 0swaps 0.07user 1.00system 0:02.32elapsed 46%CPU (0avgtext+0avgdata 410736maxresident)k 0inputs+207360outputs (1major+26016minor)pagefaults 0swaps 0.07user 0.94system 0:02.60elapsed 39%CPU (0avgtext+0avgdata 410736maxresident)k 2560inputs+207360outputs (1major+26016minor)pagefaults 0swaps 0.09user 1.08system 0:02.37elapsed 49%CPU (0avgtext+0avgdata 410752maxresident)k 0inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.00user 0.08system 0:07.04elapsed 1%CPU (0avgtext+0avgdata 1760maxresident)k 24inputs+128000outputs (0major+144minor)pagefaults 0swaps 2.10user 2.22system 0:16.24elapsed 26%CPU (0avgtext+0avgdata 410704maxresident)k 299440inputs+409600outputs (1major+25796minor)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 1.68system 2:23.89elapsed 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... 1.49user 19.54system 1:16.67elapsed 27%CPU (0avgtext+0avgdata 132992maxresident)k 32inputs+5242968outputs (0major+164476minor)pagefaults 0swaps 0.00user 0.65system 0:02.40elapsed 27%CPU (0avgtext+0avgdata 1616maxresident)k 24inputs+192000outputs (0major+125minor)pagefaults 0swaps read_checkzero done 1.20user 8.40system 0:10.03elapsed 95%CPU (0avgtext+0avgdata 1312maxresident)k 24inputs+8outputs (0major+106minor)pagefaults 0swaps 0.00user 0.00system 0:00.03elapsed 10%CPU (0avgtext+0avgdata 3616maxresident)k 40inputs+784outputs (0major+253minor)pagefaults 0swaps 0.00user 0.00system 0:00.25elapsed 2%CPU (0avgtext+0avgdata 3616maxresident)k 0inputs+784outputs (0major+254minor)pagefaults 0swaps 0.00user 0.00system 0:00.20elapsed 1%CPU (0avgtext+0avgdata 3616maxresident)k 789inputs+792outputs (0major+253minor)pagefaults 0swaps