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] [8.6% done] [ 10384/  5660 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [11.4% done] [  8284/  7952 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [14.3% done] [ 13076/  1596 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [16.7% done] [  9028/  6012 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [19.4% done] [ 10200/  3432 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [21.1% done] [  8576/  5392 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [23.7% done] [  7796/  3684 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [26.3% done] [  7308/  6004 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [28.9% done] [  7756/  4928 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [30.8% done] [  9880/  2980 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [32.5% done] [  6476/  5444 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [35.0% done] [  9620/  2784 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [36.6% done] [  4412/  6044 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [38.1% done] [  1440/  9988 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [40.5% done] [  6812/  3280 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [41.9% done] [  6172/  2140 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [43.2% done] [  5520/  4048 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [45.5% done] [  6232/  2772 kb/s] [eta 00m:24s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 3: [mmm] [46.7% done] [  5704/  2964 kb/s] [eta 00m:24s]
fio: pid=22805, got signal=6
Threads: 2: [m_m] [50.0% done] [  2220/  6644 kb/s] [eta 00m:22s]
Threads: 2: [m_m] [53.5% done] [  2152/  5828 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22806, got signal=6
Threads: 1: [m__] [57.1% done] [  5716/  1552 kb/s] [eta 00m:18s]
Threads: 1: [m__] [62.5% done] [  5569/  2742 kb/s] [eta 00m:15s]
Threads: 1: [m__] [66.7% done] [  5692/  1860 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22804, got signal=6

fio: (groupid=0): err= 0: pid=22804
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=2.9%, 4=35.6%, 8=60.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.4%, 4=0.1%, 10=1.6%, 20=4.4%, 50=35.4%, 100=11.5%
     lat (msec): 250=27.6%, 500=15.8%, 750=1.7%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22805
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=2.8%, 4=28.4%, 8=68.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.0%, 10=1.3%, 20=3.6%, 50=16.5%, 100=28.1%
     lat (msec): 250=47.9%, 500=1.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22806
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.5%, 4=33.7%, 8=63.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.2%, 10=0.5%, 20=4.0%, 50=16.1%, 100=25.5%
     lat (msec): 250=47.0%, 500=5.3%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3353/2319, merge=638/333, ticks=57552/47864, in_queue=105412, util=99.00%
0.25user 0.38system 0:27.25elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2512minor)pagefaults 0swaps