fio: (g=0): rw=randrw, bs=4K-256K/4K-256K, ioengine=posixaio, iodepth=8
...
fio: (g=0): rw=randrw, bs=4K-256K/4K-256K, ioengine=posixaio, iodepth=8
Starting 3 threads
Threads: 3
Threads: 3
Threads: 3: [mmm] [11.5% done] [ 12368/  5719 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [15.4% done] [  9012/ 11365 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [20.8% done] [ 10956/  8397 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [  3076/ 16831 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [  3726/ 15113 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 11941/  4362 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [34.6% done] [  7700/  8175 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [  2409/ 13807 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [ 10443/  4916 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  6456/  7456 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  8890/  3027 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  6005/  5566 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [   243/ 11710 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  5376/  4408 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  6058/  3649 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [60.0% done] [  6383/  2787 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [61.3% done] [  3632/  4673 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=16634, got signal=6
Threads: 2: [m_m] [62.5% done] [  7549/     0 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=16635, got signal=6
Threads: 1: [m__] [65.6% done] [  4685/  3498 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=16633, got signal=6

fio: (groupid=0): err= 0: pid=16633
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.8%, 4=40.0%, 8=55.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.2%, 10=1.3%, 20=4.0%, 50=22.8%, 100=23.2%
     lat (msec): 250=43.6%, 500=3.5%, 750=0.5%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=16634
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.2%, 4=36.7%, 8=59.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.1%, 10=1.1%, 20=4.6%, 50=18.8%, 100=31.1%
     lat (msec): 250=42.2%, 500=1.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=16635
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=3.4%, 4=32.2%, 8=63.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.6%, 10=1.2%, 20=3.2%, 50=18.1%, 100=34.3%
     lat (msec): 250=37.8%, 500=3.8%, 750=0.5%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2737/2534, merge=482/198, ticks=35844/46236, in_queue=82080, util=98.73%
0.32user 0.50system 0:22.17elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2490minor)pagefaults 0swaps