trying 2000 iterations read thread 1111759168 start write thread 1120151872 start write thread 1120151872 stop read thread 1111759168 stop Pass: all stats after completion of extending writes saw the new size Command exited with non-zero status 2 0.00user 0.14system 0:12.82elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k 8inputs+7008outputs (0major+214minor)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 0:00.14elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 32inputs+56outputs (0major+114minor)pagefaults 0swaps 0.00user 0.09system 0:07.15elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+128000outputs (0major+395minor)pagefaults 0swaps 0.11user 1.06system 0:02.31elapsed 51%CPU (0avgtext+0avgdata 0maxresident)k 2688inputs+207360outputs (1599major+24405minor)pagefaults 0swaps 0.10user 1.04system 0:02.17elapsed 53%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+207360outputs (1599major+24405minor)pagefaults 0swaps 0.11user 1.07system 0:02.57elapsed 46%CPU (0avgtext+0avgdata 0maxresident)k 2560inputs+207360outputs (1599major+24404minor)pagefaults 0swaps 0.12user 1.09system 0:02.19elapsed 55%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+207360outputs (1599major+24405minor)pagefaults 0swaps 0.00user 0.10system 0:07.01elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+128000outputs (0major+137minor)pagefaults 0swaps 2.32user 2.17system 0:15.81elapsed 28%CPU (0avgtext+0avgdata 0maxresident)k 322664inputs+409600outputs (1599major+24184minor)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 1.22system 2:26.36elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+2560008outputs (0major+473minor)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... 2.24user 20.99system 1:00.62elapsed 38%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+5242968outputs (0major+164413minor)pagefaults 0swaps 0.00user 0.90system 0:02.38elapsed 38%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+192000outputs (0major+113minor)pagefaults 0swaps read_checkzero done 0.86user 8.74system 0:11.63elapsed 82%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+8outputs (0major+96minor)pagefaults 0swaps 0.00user 0.00system 0:00.00elapsed 160%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+784outputs (0major+239minor)pagefaults 0swaps 0.00user 0.01system 0:00.18elapsed 6%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+784outputs (0major+240minor)pagefaults 0swaps 0.00user 0.00system 0:00.10elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 789inputs+792outputs (0major+239minor)pagefaults 0swaps