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] [ 13385/  1930 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [11.4% done] [ 10469/  6487 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [14.3% done] [  9768/  5583 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [17.1% done] [  9675/  5644 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [20.0% done] [ 10197/  5906 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [22.2% done] [  5969/  6521 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [25.0% done] [  7333/  4754 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [27.8% done] [  6692/  5875 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [29.7% done] [ 11568/   365 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [32.4% done] [  9199/  4201 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [35.1% done] [  7406/  3140 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [36.8% done] [  2864/  8854 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [39.5% done] [  7379/  4246 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [42.1% done] [  6891/  3466 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [44.7% done] [  7541/  1312 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [46.2% done] [  5965/  3108 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [48.7% done] [  5953/  3876 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [50.0% done] [  6003/  2912 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [52.5% done] [  4587/  3953 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [53.7% done] [  6274/  2023 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [56.1% done] [  2737/  5039 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [58.5% done] [  3128/  4953 kb/s] [eta 00m:17s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3623, got signal=6
Threads: 2: [m_m] [61.0% done] [  4437/  2592 kb/s] [eta 00m:16s]
Threads: 2: [m_m] [65.0% done] [   972/  7508 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3622, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 1: [__m] [67.5% done] [   752/  5714 kb/s] [eta 00m:13s]
fio: pid=3624, got signal=6

fio: (groupid=0): err= 0: pid=3622
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=2.7%, 4=34.1%, 8=62.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.2%, 10=1.9%, 20=6.0%, 50=20.0%, 100=18.4%
     lat (msec): 250=41.7%, 500=10.1%, 750=0.6%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3623
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=2.3%, 4=24.5%, 8=72.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.1%, 10=0.6%, 20=3.0%, 50=9.6%, 100=25.2%
     lat (msec): 250=55.6%, 500=4.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3624
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.8%, 4=21.7%, 8=76.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.5%, 10=0.5%, 20=2.9%, 50=8.4%, 100=24.8%
     lat (msec): 250=58.3%, 500=4.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3059/2445, merge=34/60, ticks=55620/35740, in_queue=91360, util=98.83%
0.22user 0.28system 0:27.64elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2498minor)pagefaults 0swaps