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] [8.8% done] [  6164/  7895 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [12.1% done] [  3510/ 10711 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [15.6% done] [  2663/ 13113 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [18.2% done] [  9528/  2881 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [20.6% done] [  6326/  5428 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [22.9% done] [  4596/  6452 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [25.0% done] [ 10142/  1511 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [27.0% done] [  4063/  6603 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [28.9% done] [  6976/  1422 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [31.6% done] [  7538/  2882 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [33.3% done] [  3994/  5757 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.9% done] [  6058/  3291 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [37.5% done] [  6192/  3417 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [40.0% done] [  9296/     0 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.5% done] [  6584/  1794 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [43.9% done] [  6442/  2694 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.2% done] [  6215/  3344 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [46.5% done] [  5878/  1470 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [48.8% done] [  3758/  3616 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [50.0% done] [  5168/  1206 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [51.1% done] [  3815/  2799 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [53.3% done] [  3447/  3747 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [54.3% done] [  3161/  3279 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [56.5% done] [  3177/  3746 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [57.4% done] [  6095/   406 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [58.3% done] [  4766/  1605 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [59.2% done] [  5928/  1511 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [61.2% done] [  4449/  3905 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [62.0% done] [  5018/  1690 kb/s] [eta 00m:19s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=10995, got signal=6
Threads: 2: [m_m] [62.7% done] [  4852/  2177 kb/s] [eta 00m:19s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=10994, got signal=6
Threads: 1: [__m] [67.3% done] [  2916/  3453 kb/s] [eta 00m:16s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=10996, got signal=6

fio: (groupid=0): err= 0: pid=10994
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=1.0%, 4=13.6%, 8=85.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.2%, 10=0.7%, 20=3.8%, 50=16.4%, 100=6.0%
     lat (msec): 250=66.0%, 500=5.6%, 750=0.2%, 1000=0.4%, >=2000=0.1%
fio: (groupid=0): err= 0: pid=10995
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.5%, 4=11.8%, 8=87.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.4%, 20=2.1%, 50=16.7%, 100=5.8%
     lat (msec): 250=67.5%, 500=6.8%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=10996
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.3%, 4=13.7%, 8=84.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=1.1%, 10=0.5%, 20=3.0%, 50=13.9%, 100=3.9%
     lat (msec): 250=66.6%, 500=8.9%, 750=0.5%, 1000=0.2%, >=2000=0.2%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3366/2202, merge=716/395, ticks=74768/39380, in_queue=114148, util=99.34%
0.11user 0.29system 0:33.88elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2517minor)pagefaults 0swaps