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
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5154, got signal=6
Threads: 2
Threads: 2: [mm_] [10.0% done] [ 11456/  3780 kb/s] [eta 00m:27s]
Threads: 2: [mm_] [14.3% done] [  6148/  6836 kb/s] [eta 00m:24s]
Threads: 2: [mm_] [18.5% done] [  6888/  7236 kb/s] [eta 00m:22s]
Threads: 2: [mm_] [22.2% done] [  8976/  3132 kb/s] [eta 00m:21s]
Threads: 2: [mm_] [25.9% done] [  3412/  8832 kb/s] [eta 00m:20s]
Threads: 2: [mm_] [29.6% done] [ 11420/     0 kb/s] [eta 00m:19s]
Threads: 2: [mm_] [33.3% done] [  8944/  2380 kb/s] [eta 00m:18s]
Threads: 2: [mm_] [35.7% done] [  4688/  5268 kb/s] [eta 00m:18s]
Threads: 2: [mm_] [40.7% done] [  2340/  7496 kb/s] [eta 00m:16s]
Threads: 2: [mm_] [42.9% done] [  5856/  2356 kb/s] [eta 00m:16s]
Threads: 2: [mm_] [46.4% done] [  2194/  7771 kb/s] [eta 00m:15s]
Threads: 2: [mm_] [48.3% done] [  5672/  2104 kb/s] [eta 00m:15s]
Threads: 2: [mm_] [51.7% done] [  8388/    72 kb/s] [eta 00m:14s]
Threads: 2: [mm_] [53.3% done] [  5848/  1728 kb/s] [eta 00m:14s]
Threads: 2: [mm_] [56.7% done] [  4940/  1268 kb/s] [eta 00m:13s]
Threads: 2: [mm_] [56.2% done] [  4024/  5224 kb/s] [eta 00m:14s]
Threads: 2: [mm_] [57.6% done] [  2820/  4252 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5152, got signal=6
Threads: 1: [_m_] [62.5% done] [  7004/   108 kb/s] [eta 00m:12s]
Threads: 1: [_m_] [65.6% done] [  6612/     0 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5153, got signal=6

fio: (groupid=0): err= 0: pid=5152
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=2.9%, 4=23.0%, 8=73.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.7%, 4=0.0%, 10=2.6%, 20=3.8%, 50=24.5%, 100=18.1%
     lat (msec): 250=46.8%, 500=1.5%, 750=0.5%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=5153
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=0.5%, 4=21.7%, 8=77.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.5%, 20=1.6%, 50=29.7%, 100=16.8%
     lat (msec): 250=46.9%, 500=2.0%, 750=1.2%, 1000=0.6%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=5154
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=18.2%, 2=18.2%, 4=36.4%, 8=27.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.0%, 50=0.0%, 100=0.0%
     lat (msec): 250=0.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=18.2%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2523/1563, merge=506/1546, ticks=35228/282508, in_queue=242076, util=99.44%
0.09user 0.32system 0:22.51elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2460minor)pagefaults 0swaps