trying 2000 iterations read thread 1099995456 start write thread 1108388160 start write thread 1108388160 stop read thread 1099995456 stop Pass: all stats after completion of extending writes saw the new size Command exited with non-zero status 2 0.00user 0.14system 0:12.17elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k 8inputs+7008outputs (0major+216minor)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 0:00.06elapsed 5%CPU (0avgtext+0avgdata 0maxresident)k 32inputs+56outputs (0major+113minor)pagefaults 0swaps 0.00user 0.14system 0:07.20elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+128000outputs (0major+397minor)pagefaults 0swaps 0.11user 1.40system 0:02.81elapsed 53%CPU (0avgtext+0avgdata 0maxresident)k 2688inputs+207360outputs (1599major+24404minor)pagefaults 0swaps 0.16user 1.38system 0:02.42elapsed 64%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+207360outputs (1599major+24405minor)pagefaults 0swaps 0.14user 1.39system 0:02.81elapsed 54%CPU (0avgtext+0avgdata 0maxresident)k 2560inputs+207360outputs (1599major+24405minor)pagefaults 0swaps 0.13user 1.40system 0:02.36elapsed 64%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+207360outputs (1599major+24404minor)pagefaults 0swaps 0.00user 0.11system 0:07.51elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+128000outputs (0major+136minor)pagefaults 0swaps 2.60user 3.09system 0:16.59elapsed 34%CPU (0avgtext+0avgdata 0maxresident)k 309120inputs+409600outputs (1599major+24185minor)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 0.01user 1.85system 2:25.07elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+2560008outputs (0major+474minor)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... 2.34user 26.54system 1:05.75elapsed 43%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+5242968outputs (0major+164423minor)pagefaults 0swaps 0.00user 1.23system 0:02.90elapsed 42%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+192000outputs (0major+113minor)pagefaults 0swaps read_checkzero done 1.62user 14.25system 0:15.90elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+8outputs (0major+96minor)pagefaults 0swaps 0.00user 0.00system 0:00.00elapsed 114%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+784outputs (0major+239minor)pagefaults 0swaps 0.00user 0.00system 0:00.21elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+784outputs (0major+239minor)pagefaults 0swaps 0.00user 0.00system 0:00.13elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k 789inputs+792outputs (0major+239minor)pagefaults 0swaps