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] [7.5% done] [  3656/ 13000 kb/s] [eta 00m:37s]
Threads: 3: [mmm] [10.3% done] [  7351/ 10197 kb/s] [eta 00m:35s]
Threads: 3: [mmm] [11.6% done] [ 10536/  4236 kb/s] [eta 00m:38s]
Threads: 3: [mmm] [12.8% done] [  2436/ 11988 kb/s] [eta 00m:41s]
Threads: 3: [mmm] [14.6% done] [  5205/  8852 kb/s] [eta 00m:41s]
Threads: 3: [mmm] [18.2% done] [  4400/ 10052 kb/s] [eta 00m:36s]
Threads: 3: [mmm] [23.7% done] [  1344/ 13036 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [25.6% done] [  3496/ 10336 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [27.5% done] [  8340/  4368 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [29.3% done] [  3632/  8816 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [31.0% done] [  4984/  6388 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [34.1% done] [  5712/  6760 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [36.6% done] [  6024/  4472 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [38.1% done] [  5060/  5448 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [39.5% done] [  5884/  3012 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [41.9% done] [  6680/  3744 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [44.2% done] [  6684/  1792 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [44.4% done] [  4216/  3924 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [45.7% done] [  5200/  2180 kb/s] [eta 00m:25s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21123, got signal=6
Threads: 2: [mm_] [47.8% done] [  3092/  3816 kb/s] [eta 00m:24s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21122, got signal=6
Threads: 1: [m__] [51.1% done] [  5188/  2284 kb/s] [eta 00m:22s]
Threads: 1: [m__] [57.1% done] [  3380/  5612 kb/s] [eta 00m:18s]
Threads: 1: [m__] [62.5% done] [  3852/  4812 kb/s] [eta 00m:15s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 1: [m__] [66.7% done] [  3120/  3888 kb/s] [eta 00m:13s]
fio: pid=21121, got signal=6

fio: (groupid=0): err= 0: pid=21121
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=1.0%, 2=5.0%, 4=42.5%, 8=51.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.9%, 4=0.1%, 10=2.7%, 20=6.1%, 50=40.1%, 100=11.1%
     lat (msec): 250=24.4%, 500=10.6%, 750=1.8%, 1000=0.2%, >=2000=0.4%
fio: (groupid=0): err= 0: pid=21122
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=2.9%, 4=32.2%, 8=64.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.0%, 10=2.2%, 20=3.0%, 50=13.6%, 100=25.3%
     lat (msec): 250=50.5%, 500=4.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21123
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=3.5%, 4=38.3%, 8=57.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.2%, 10=0.8%, 20=2.2%, 50=18.2%, 100=30.1%
     lat (msec): 250=42.4%, 500=4.8%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2716/3079, merge=458/287, ticks=42168/56148, in_queue=98316, util=98.91%
0.26user 0.36system 0:27.01elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2506minor)pagefaults 0swaps