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] [9.4% done] [ 14420/  2172 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [12.9% done] [ 13680/  3100 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [16.1% done] [ 10252/  6612 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [17.6% done] [  9232/  4480 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [19.4% done] [  8456/  4772 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [21.6% done] [ 10248/  2512 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [23.7% done] [  9272/  3064 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [26.3% done] [ 10564/  1664 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [28.2% done] [  7676/  5392 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [30.0% done] [  1836/ 10944 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [31.7% done] [  3212/  9484 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [33.3% done] [  5116/  6408 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [35.7% done] [  4168/  6636 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [37.2% done] [  5660/  5404 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [38.6% done] [  4684/  4816 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [40.9% done] [  8108/  1008 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [42.2% done] [  6260/  2276 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [45.5% done] [  3436/  6004 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [45.7% done] [   856/  7672 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [47.8% done] [  3340/  3984 kb/s] [eta 00m:24s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=9052, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=9051, got signal=6
Threads: 1: [m__] [51.1% done] [  3944/  4504 kb/s] [eta 00m:22s]
Threads: 1: [m__] [57.1% done] [  1568/  8728 kb/s] [eta 00m:18s]
Threads: 1: [m__] [62.5% done] [  7860/     0 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] [  3232/  4148 kb/s] [eta 00m:13s]
fio: pid=9050, got signal=6

fio: (groupid=0): err= 0: pid=9050
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.6%, 4=30.4%, 8=66.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.2%, 10=1.4%, 20=7.0%, 50=35.7%, 100=10.3%
     lat (msec): 250=29.2%, 500=13.5%, 750=1.1%, 1000=0.5%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=9051
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=2.3%, 4=33.5%, 8=63.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=2.4%, 20=5.7%, 50=14.3%, 100=24.0%
     lat (msec): 250=46.5%, 500=6.6%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=9052
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.0%, 4=32.3%, 8=64.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.2%, 4=0.4%, 10=1.3%, 20=3.4%, 50=13.7%, 100=29.5%
     lat (msec): 250=47.6%, 500=2.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2918/2852, merge=614/176, ticks=49824/50084, in_queue=99912, util=98.66%
0.19user 0.43system 0:27.13elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2486minor)pagefaults 0swaps