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] [5.0% done] [  2740/  1192 kb/s] [eta 00m:57s]
Threads: 3: [mmm] [6.7% done] [  3864/  2820 kb/s] [eta 00m:56s]
Threads: 3: [mmm] [8.3% done] [  8744/  6352 kb/s] [eta 00m:55s]
Threads: 3: [mmm] [10.0% done] [  4200/  8356 kb/s] [eta 00m:54s]
Threads: 3: [mmm] [11.7% done] [ 10008/  2936 kb/s] [eta 00m:53s]
Threads: 3: [mmm] [13.3% done] [  5148/  6528 kb/s] [eta 00m:52s]
Threads: 3: [mmm] [15.0% done] [  3891/  7479 kb/s] [eta 00m:51s]
Threads: 3: [mmm] [16.7% done] [  8612/  4008 kb/s] [eta 00m:50s]
Threads: 3: [mmm] [18.3% done] [  5764/  4220 kb/s] [eta 00m:49s]
Threads: 3: [mmm] [20.0% done] [  3052/ 10220 kb/s] [eta 00m:48s]
Threads: 3: [mmm] [21.7% done] [  8984/  4372 kb/s] [eta 00m:47s]
Threads: 3: [mmm] [23.3% done] [  7516/  5724 kb/s] [eta 00m:46s]
Threads: 3: [mmm] [25.0% done] [  8796/  4060 kb/s] [eta 00m:45s]
Threads: 3: [mmm] [26.7% done] [  9032/  1964 kb/s] [eta 00m:44s]
Threads: 3: [mmm] [28.3% done] [  6970/  5217 kb/s] [eta 00m:43s]
Threads: 3: [mmm] [30.0% done] [  5224/  3752 kb/s] [eta 00m:42s]
Threads: 3: [mmm] [31.7% done] [ 10436/     0 kb/s] [eta 00m:41s]
Threads: 3: [mmm] [33.9% done] [  7632/  2348 kb/s] [eta 00m:39s]
Threads: 3: [mmm] [36.8% done] [  8648/     0 kb/s] [eta 00m:36s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21430, got signal=6
Threads: 2: [mm_] [40.7% done] [  3948/  6968 kb/s] [eta 00m:32s]
Threads: 2: [mm_] [42.6% done] [  3992/  4876 kb/s] [eta 00m:31s]
Threads: 2: [mm_] [46.2% done] [  2248/  7072 kb/s] [eta 00m:28s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21428, got signal=6
Threads: 1: [_m_] [48.1% done] [  2700/  6388 kb/s] [eta 00m:27s]
Threads: 1: [_m_] [54.2% done] [  4772/  4912 kb/s] [eta 00m:22s]
Threads: 1: [_m_] [60.0% done] [  7620/     0 kb/s] [eta 00m:18s]
Threads: 1: [_m_] [65.1% done] [  3656/  4472 kb/s] [eta 00m:15s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21429, got signal=6

fio: (groupid=0): err= 0: pid=21428
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=4.2%, 4=36.9%, 8=58.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.1%, 4=0.2%, 10=3.2%, 20=4.8%, 50=21.9%, 100=20.8%
     lat (msec): 250=37.1%, 500=9.5%, 750=1.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21429
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=2.3%, 4=30.1%, 8=67.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.5%, 10=1.5%, 20=5.9%, 50=42.2%, 100=14.7%
     lat (msec): 250=29.7%, 500=3.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21430
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.5%, 4=33.3%, 8=63.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.5%, 10=1.2%, 20=3.2%, 50=15.1%, 100=32.4%
     lat (msec): 250=43.0%, 500=2.8%, 750=0.1%, 1000=0.5%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3195/3089, merge=633/3887, ticks=52148/1210752, in_queue=1142148, util=99.58%
0.20user 0.50system 0:29.63elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2516minor)pagefaults 0swaps