trying 2000 iterations read thread 1084270912 start write thread 1107061056 start write thread 1107061056 stop read thread 1084270912 stop Pass: all stats after completion of extending writes saw the new size Command exited with non-zero status 2 0.00user 0.13system 0:12.16elapsed 1%CPU (0avgtext+0avgdata 2960maxresident)k 56inputs+7008outputs (0major+236minor)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 0:00.08elapsed 1%CPU (0avgtext+0avgdata 1568maxresident)k 64inputs+40outputs (0major+125minor)pagefaults 0swaps 0.00user 0.09system 0:06.99elapsed 1%CPU (0avgtext+0avgdata 5904maxresident)k 24inputs+128000outputs (0major+407minor)pagefaults 0swaps 0.08user 0.91system 0:02.41elapsed 41%CPU (0avgtext+0avgdata 410736maxresident)k 2720inputs+207360outputs (1major+26015minor)pagefaults 0swaps 0.09user 0.90system 0:02.30elapsed 43%CPU (0avgtext+0avgdata 410752maxresident)k 0inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.06user 0.96system 0:02.45elapsed 41%CPU (0avgtext+0avgdata 410752maxresident)k 2560inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.07user 0.92system 0:02.76elapsed 36%CPU (0avgtext+0avgdata 410752maxresident)k 0inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.00user 0.08system 0:07.03elapsed 1%CPU (0avgtext+0avgdata 1760maxresident)k 24inputs+128000outputs (0major+144minor)pagefaults 0swaps 3.18user 2.52system 0:16.87elapsed 33%CPU (0avgtext+0avgdata 410720maxresident)k 328208inputs+409600outputs (1major+25797minor)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 1.51system 2:21.98elapsed 1%CPU (0avgtext+0avgdata 7200maxresident)k 24inputs+2560008outputs (0major+485minor)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... 1.50user 18.73system 1:10.30elapsed 28%CPU (0avgtext+0avgdata 132992maxresident)k 24inputs+5242968outputs (0major+164456minor)pagefaults 0swaps 0.00user 0.65system 0:02.36elapsed 27%CPU (0avgtext+0avgdata 1632maxresident)k 16inputs+192000outputs (0major+126minor)pagefaults 0swaps read_checkzero done 1.18user 8.86system 0:10.08elapsed 99%CPU (0avgtext+0avgdata 1328maxresident)k 16inputs+8outputs (0major+107minor)pagefaults 0swaps 0.00user 0.00system 0:00.03elapsed 12%CPU (0avgtext+0avgdata 3616maxresident)k 32inputs+784outputs (0major+253minor)pagefaults 0swaps 0.00user 0.00system 0:00.24elapsed 2%CPU (0avgtext+0avgdata 3600maxresident)k 0inputs+784outputs (0major+252minor)pagefaults 0swaps 0.00user 0.00system 0:00.21elapsed 1%CPU (0avgtext+0avgdata 3616maxresident)k 789inputs+792outputs (0major+253minor)pagefaults 0swaps