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] [9.7% done] [  9328/  7680 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [11.4% done] [ 11072/  5612 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [15.6% done] [ 11145/  4987 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [18.2% done] [  7947/  5831 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [20.6% done] [  4508/ 10584 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [24.2% done] [  7564/  7032 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [25.0% done] [ 11643/  1121 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [27.8% done] [  5796/  6996 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [30.6% done] [  6740/  6340 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [31.6% done] [  5348/  5824 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [33.3% done] [  6024/  5176 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.9% done] [  7628/  4456 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [38.5% done] [  6612/  4832 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.0% done] [  4716/  5708 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [41.5% done] [  5304/  4444 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [42.9% done] [  3576/  6128 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [44.2% done] [  3052/  6504 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [46.5% done] [  4144/  4548 kb/s] [eta 00m:23s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 3: [mmm] [46.7% done] [  1656/  5552 kb/s] [eta 00m:24s]
fio: pid=12749, got signal=6
Threads: 2: [m_m] [50.0% done] [  4000/  4312 kb/s] [eta 00m:22s]
Threads: 2: [m_m] [53.5% done] [  2624/  6132 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12750, got signal=6
Threads: 1: [m__] [57.1% done] [  6592/  1668 kb/s] [eta 00m:18s]
Threads: 1: [m__] [62.5% done] [  7784/     0 kb/s] [eta 00m:15s]
Threads: 1: [m__] [66.7% done] [  7056/     0 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12748, got signal=6

fio: (groupid=0): err= 0: pid=12748
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=1.2%, 4=34.0%, 8=64.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.4%, 20=1.7%, 50=39.5%, 100=13.1%
     lat (msec): 250=31.0%, 500=11.4%, 750=1.0%, 1000=0.8%, >=2000=0.5%
fio: (groupid=0): err= 0: pid=12749
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=1.1%, 2=5.0%, 4=41.8%, 8=52.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.0%, 4=0.1%, 10=2.5%, 20=4.8%, 50=17.7%, 100=29.1%
     lat (msec): 250=41.3%, 500=2.8%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12750
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=3.4%, 4=33.8%, 8=62.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.2%, 4=0.1%, 10=1.6%, 20=3.5%, 50=16.2%, 100=24.8%
     lat (msec): 250=43.8%, 500=8.3%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2916/2808, merge=507/231, ticks=47996/51180, in_queue=99168, util=98.71%
0.26user 0.28system 0:27.20elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2486minor)pagefaults 0swaps