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] [9.7% done] [ 12756/  4772 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [12.9% done] [ 12152/  3048 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [17.2% done] [  5652/ 11228 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [20.0% done] [ 11836/  1948 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [21.9% done] [  8276/  5508 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [25.0% done] [  7348/  6380 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [27.3% done] [  9456/  2900 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [29.4% done] [  4316/  9280 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [31.4% done] [  8772/  3848 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [36.4% done] [  6816/  7168 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [38.2% done] [  4372/  7332 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [41.2% done] [  6260/  4456 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [42.9% done] [ 10172/   704 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [44.4% done] [  2156/  9628 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [47.2% done] [  6016/  4036 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [47.4% done] [  6512/  2592 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [48.7% done] [  2736/  5408 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [50.0% done] [  3148/  5876 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [52.5% done] [  5712/  3388 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [53.7% done] [  5024/  3132 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [54.8% done] [  4388/  2396 kb/s] [eta 00m:19s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=14520, got signal=6
Threads: 2: [m_m] [57.1% done] [  5416/  1612 kb/s] [eta 00m:18s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=14521, got signal=6
Threads: 1: [m__] [61.0% done] [  6000/  1480 kb/s] [eta 00m:16s]
Threads: 1: [m__] [66.7% done] [  3372/  3948 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=14519, got signal=6

fio: (groupid=0): err= 0: pid=14519
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=3.5%, 4=37.3%, 8=58.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.1%, 10=1.8%, 20=5.4%, 50=32.2%, 100=10.9%
     lat (msec): 250=34.7%, 500=12.2%, 750=1.8%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=14520
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=2.4%, 4=32.9%, 8=64.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.0%, 10=1.3%, 20=2.8%, 50=16.7%, 100=26.0%
     lat (msec): 250=47.3%, 500=4.9%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=14521
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.5%, 4=32.5%, 8=64.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.0%, 10=1.8%, 20=2.1%, 50=14.5%, 100=25.1%
     lat (msec): 250=49.2%, 500=5.9%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3393/2314, merge=411/389, ticks=58520/115496, in_queue=174016, util=98.99%
0.28user 0.54system 0:27.25elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2480minor)pagefaults 0swaps