trying 2000 iterations read thread 1111423296 start write thread 1119816000 start write thread 1119816000 stop read thread 1111423296 stop Pass: all stats after completion of extending writes saw the new size Command exited with non-zero status 2 0.00user 0.16system 0:12.12elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k 8inputs+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 0:00.06elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 32inputs+56outputs (0major+114minor)pagefaults 0swaps 0.00user 0.10system 0:07.23elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+128000outputs (0major+396minor)pagefaults 0swaps 0.14user 1.46system 0:03.22elapsed 50%CPU (0avgtext+0avgdata 0maxresident)k 2688inputs+207360outputs (1599major+24404minor)pagefaults 0swaps 0.12user 1.19system 0:02.63elapsed 50%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+207360outputs (1599major+24404minor)pagefaults 0swaps 0.11user 1.17system 0:02.92elapsed 44%CPU (0avgtext+0avgdata 0maxresident)k 2560inputs+207360outputs (1599major+24406minor)pagefaults 0swaps 0.12user 1.51system 0:02.78elapsed 58%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+207360outputs (1599major+24405minor)pagefaults 0swaps 0.00user 0.10system 0:07.09elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+128000outputs (0major+136minor)pagefaults 0swaps 2.76user 3.09system 0:17.65elapsed 33%CPU (0avgtext+0avgdata 0maxresident)k 330592inputs+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 0.00user 2.18system 2:33.43elapsed 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... 2.24user 27.42system 1:11.60elapsed 41%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+5242968outputs (0major+164404minor)pagefaults 0swaps 0.00user 1.04system 0:02.65elapsed 39%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+192000outputs (0major+114minor)pagefaults 0swaps read_checkzero done 1.80user 12.89system 0:14.72elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+8outputs (0major+95minor)pagefaults 0swaps 0.00user 0.00system 0:00.00elapsed 66%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+784outputs (0major+240minor)pagefaults 0swaps 0.00user 0.01system 0:00.20elapsed 7%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+784outputs (0major+240minor)pagefaults 0swaps 0.00user 0.00system 0:00.12elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k 789inputs+792outputs (0major+239minor)pagefaults 0swaps