trying 2000 iterations read thread 1112394048 start write thread 1120786752 start write thread 1120786752 stop read thread 1112394048 stop Pass: all stats after completion of extending writes saw the new size Command exited with non-zero status 2 0.00user 0.09system 0:12.16elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 88inputs+7008outputs (0major+213minor)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 0:00.07elapsed 5%CPU (0avgtext+0avgdata 0maxresident)k 64inputs+56outputs (0major+113minor)pagefaults 0swaps 0.00user 0.08system 0:06.96elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k 40inputs+128000outputs (0major+397minor)pagefaults 0swaps 0.12user 1.02system 0:02.52elapsed 45%CPU (0avgtext+0avgdata 0maxresident)k 2728inputs+207360outputs (1599major+24405minor)pagefaults 0swaps 0.11user 1.05system 0:02.03elapsed 57%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+207360outputs (1599major+24405minor)pagefaults 0swaps 0.14user 0.95system 0:02.31elapsed 47%CPU (0avgtext+0avgdata 0maxresident)k 2560inputs+207368outputs (1599major+24404minor)pagefaults 0swaps 0.13user 1.02system 0:02.01elapsed 57%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+207360outputs (1599major+24405minor)pagefaults 0swaps 0.00user 0.06system 0:07.26elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 32inputs+128000outputs (0major+136minor)pagefaults 0swaps 2.78user 2.23system 0:16.71elapsed 30%CPU (0avgtext+0avgdata 0maxresident)k 282976inputs+409600outputs (1599major+24186minor)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 0.02user 1.17system 2:22.69elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 24inputs+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... 2.36user 20.25system 0:57.12elapsed 39%CPU (0avgtext+0avgdata 0maxresident)k 196640inputs+5242968outputs (0major+164404minor)pagefaults 0swaps 0.00user 0.84system 0:02.20elapsed 38%CPU (0avgtext+0avgdata 0maxresident)k 24inputs+192000outputs (0major+113minor)pagefaults 0swaps read_checkzero done 0.78user 8.87system 0:09.70elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k 16inputs+8outputs (0major+96minor)pagefaults 0swaps 0.00user 0.00system 0:00.02elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 32inputs+784outputs (0major+239minor)pagefaults 0swaps 0.00user 0.00system 0:00.20elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+784outputs (0major+239minor)pagefaults 0swaps 0.00user 0.00system 0:00.11elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k 789inputs+792outputs (0major+240minor)pagefaults 0swaps