trying 2000 iterations read thread 1109612864 start write thread 1088600384 start write thread 1088600384 stop read thread 1109612864 stop Pass: all stats after completion of extending writes saw the new size Command exited with non-zero status 2 0.00user 0.15system 0:12.13elapsed 1%CPU (0avgtext+0avgdata 3168maxresident)k 32inputs+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 4%CPU (0avgtext+0avgdata 1568maxresident)k 56inputs+56outputs (0major+126minor)pagefaults 0swaps 0.00user 0.08system 0:06.96elapsed 1%CPU (0avgtext+0avgdata 5888maxresident)k 24inputs+128000outputs (0major+405minor)pagefaults 0swaps 0.07user 1.03system 0:02.23elapsed 49%CPU (0avgtext+0avgdata 411248maxresident)k 2720inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.08user 0.96system 0:01.97elapsed 53%CPU (0avgtext+0avgdata 411232maxresident)k 0inputs+207360outputs (1major+26016minor)pagefaults 0swaps 0.07user 0.96system 0:02.15elapsed 48%CPU (0avgtext+0avgdata 411248maxresident)k 2560inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.06user 0.91system 0:01.94elapsed 50%CPU (0avgtext+0avgdata 411248maxresident)k 0inputs+207360outputs (1major+26017minor)pagefaults 0swaps 0.00user 0.10system 0:07.05elapsed 1%CPU (0avgtext+0avgdata 1776maxresident)k 24inputs+128000outputs (0major+145minor)pagefaults 0swaps 1.99user 2.24system 0:15.75elapsed 26%CPU (0avgtext+0avgdata 411216maxresident)k 320096inputs+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 2.09system 2:21.07elapsed 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... 1.67user 20.64system 1:00.80elapsed 36%CPU (0avgtext+0avgdata 132992maxresident)k 24inputs+5242968outputs (0major+164457minor)pagefaults 0swaps 0.00user 0.75system 0:02.11elapsed 35%CPU (0avgtext+0avgdata 1632maxresident)k 16inputs+192000outputs (0major+126minor)pagefaults 0swaps read_checkzero done 1.13user 9.85system 0:11.02elapsed 99%CPU (0avgtext+0avgdata 1328maxresident)k 16inputs+8outputs (0major+107minor)pagefaults 0swaps 0.00user 0.00system 0:00.03elapsed 9%CPU (0avgtext+0avgdata 3616maxresident)k 32inputs+784outputs (0major+253minor)pagefaults 0swaps 0.00user 0.00system 0:00.21elapsed 3%CPU (0avgtext+0avgdata 3616maxresident)k 0inputs+784outputs (0major+253minor)pagefaults 0swaps 0.00user 0.00system 0:00.21elapsed 1%CPU (0avgtext+0avgdata 3600maxresident)k 789inputs+792outputs (0major+252minor)pagefaults 0swaps