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] [9.1% done] [ 12445/  3721 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [11.4% done] [  9208/  6915 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [13.5% done] [ 14312/   496 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [16.7% done] [ 12512/  1815 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [18.4% done] [  7195/  8975 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [20.5% done] [  6443/  6742 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [23.7% done] [  8396/  3544 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [26.3% done] [  9798/  2166 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [28.9% done] [  5856/  7459 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [30.8% done] [  2348/ 10109 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [33.3% done] [  7464/  5240 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.0% done] [  1124/ 10596 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [36.6% done] [  3676/  6336 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [38.1% done] [  7840/  1492 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [40.5% done] [  7568/  2252 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [42.9% done] [  3380/  5348 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [45.2% done] [  2312/  5624 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [46.5% done] [  5940/  2648 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [48.8% done] [  3220/  5876 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [51.2% done] [  4304/  2760 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17657, got signal=6
Threads: 2: [m_m] [52.3% done] [  4704/  2724 kb/s] [eta 00m:21s]
Threads: 2: [m_m] [53.3% done] [  4288/  3308 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17658, got signal=6
Threads: 1: [m__] [58.1% done] [  6742/   992 kb/s] [eta 00m:18s]
Threads: 1: [m__] [63.4% done] [  3756/  5020 kb/s] [eta 00m:15s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17656, got signal=6

fio: (groupid=0): err= 0: pid=17656
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.9%, 2=4.1%, 4=41.5%, 8=53.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.3%, 4=0.2%, 10=1.0%, 20=8.7%, 50=30.9%, 100=13.9%
     lat (msec): 250=29.5%, 500=11.7%, 750=2.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17657
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=3.9%, 4=33.5%, 8=61.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.0%, 10=1.1%, 20=3.6%, 50=15.9%, 100=25.4%
     lat (msec): 250=48.5%, 500=4.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17658
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=3.0%, 4=31.5%, 8=65.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.1%, 10=0.5%, 20=2.8%, 50=13.2%, 100=28.1%
     lat (msec): 250=50.0%, 500=3.3%, 750=0.6%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3300/2669, merge=497/333, ticks=56408/49452, in_queue=105860, util=98.44%
0.22user 0.41system 0:28.12elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2499minor)pagefaults 0swaps