trying 2000 iterations read thread 1105365312 start write thread 1113758016 start write thread 1113758016 stop read thread 1105365312 stop Pass: all stats after completion of extending writes saw the new size Command exited with non-zero status 2 0.00user 0.14system 0:12.66elapsed 1%CPU (0avgtext+0avgdata 3184maxresident)k 64inputs+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 0:00.29elapsed 0%CPU (0avgtext+0avgdata 1568maxresident)k 56inputs+56outputs (0major+126minor)pagefaults 0swaps 0.00user 0.10system 0:07.10elapsed 1%CPU (0avgtext+0avgdata 5888maxresident)k 24inputs+128000outputs (0major+406minor)pagefaults 0swaps 0.07user 0.97system 0:02.18elapsed 47%CPU (0avgtext+0avgdata 411232maxresident)k 2720inputs+207360outputs (1major+26016minor)pagefaults 0swaps 0.08user 0.96system 0:01.99elapsed 52%CPU (0avgtext+0avgdata 411248maxresident)k 0inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.07user 0.96system 0:02.22elapsed 47%CPU (0avgtext+0avgdata 411248maxresident)k 2560inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.07user 0.96system 0:02.16elapsed 48%CPU (0avgtext+0avgdata 411248maxresident)k 0inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.00user 0.09system 0:07.00elapsed 1%CPU (0avgtext+0avgdata 1760maxresident)k 24inputs+128000outputs (0major+144minor)pagefaults 0swaps 4.44user 3.07system 0:16.18elapsed 46%CPU (0avgtext+0avgdata 411216maxresident)k 320696inputs+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 1.88system 2:22.04elapsed 1%CPU (0avgtext+0avgdata 7216maxresident)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... 1.49user 19.51system 1:13.38elapsed 28%CPU (0avgtext+0avgdata 133008maxresident)k 24inputs+5242968outputs (0major+164457minor)pagefaults 0swaps 0.00user 0.63system 0:02.40elapsed 26%CPU (0avgtext+0avgdata 1632maxresident)k 16inputs+192000outputs (0major+126minor)pagefaults 0swaps read_checkzero done 0.97user 9.20system 0:10.50elapsed 96%CPU (0avgtext+0avgdata 1312maxresident)k 16inputs+8outputs (0major+106minor)pagefaults 0swaps 0.00user 0.00system 0:00.03elapsed 15%CPU (0avgtext+0avgdata 3600maxresident)k 32inputs+784outputs (0major+252minor)pagefaults 0swaps 0.00user 0.00system 0:00.18elapsed 2%CPU (0avgtext+0avgdata 3600maxresident)k 0inputs+784outputs (0major+252minor)pagefaults 0swaps 0.00user 0.00system 0:00.21elapsed 0%CPU (0avgtext+0avgdata 3600maxresident)k 789inputs+792outputs (0major+252minor)pagefaults 0swaps