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] [10.0% done] [ 11944/  5668 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [13.8% done] [ 11272/  4936 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [16.1% done] [  9560/  7712 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [19.4% done] [  8696/  6060 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [22.6% done] [  8180/  5940 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [24.2% done] [  3715/  7851 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [26.5% done] [  9480/  3356 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [27.8% done] [ 13264/     0 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [30.6% done] [ 10348/  2836 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [33.3% done] [  5868/  6476 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [35.1% done] [  1180/ 10200 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [36.8% done] [  9544/  1436 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [37.5% done] [  4092/  7248 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [40.0% done] [  7920/  3004 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [40.5% done] [  5896/  2668 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [42.9% done] [  6468/  2840 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [45.2% done] [  7303/   984 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [46.5% done] [  4974/  3855 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.7% done] [  4052/  4186 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.8% done] [  4162/  2689 kb/s] [eta 00m:24s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12571, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 2: [m_m] [48.9% done] [  4808/  1866 kb/s] [eta 00m:24s]
fio: pid=12572, got signal=6
Threads: 1: [m__] [55.8% done] [  2177/  7439 kb/s] [eta 00m:19s]
Threads: 1: [m__] [62.5% done] [  5269/  4332 kb/s] [eta 00m:15s]
Threads: 1: [m__] [66.7% done] [  6226/   649 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12570, got signal=6

fio: (groupid=0): err= 0: pid=12570
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.6%, 4=46.3%, 8=49.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.1%, 10=0.0%, 20=3.7%, 50=42.6%, 100=10.8%
     lat (msec): 250=27.0%, 500=12.2%, 750=2.0%, 1000=0.4%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12571
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=3.5%, 4=28.8%, 8=67.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.0%, 10=0.2%, 20=2.6%, 50=17.2%, 100=22.5%
     lat (msec): 250=53.7%, 500=2.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12572
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=2.7%, 4=33.5%, 8=63.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.8%, 20=2.3%, 50=12.9%, 100=29.8%
     lat (msec): 250=49.2%, 500=3.9%, 750=0.5%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3452/2312, merge=461/156, ticks=56108/37384, in_queue=93492, util=98.53%
0.20user 0.44system 0:27.52elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2480minor)pagefaults 0swaps