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] [8.8% done] [  7468/  9337 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [12.1% done] [  7665/  8641 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [14.7% done] [  9764/  5709 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [17.6% done] [  5883/  9528 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [18.9% done] [  7476/  6928 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [20.0% done] [ 11016/   796 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [22.5% done] [  8403/  5286 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [24.4% done] [  7074/  6042 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [26.8% done] [  8858/  4567 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [28.6% done] [  7866/  4262 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [31.0% done] [ 10036/  1645 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [35.0% done] [  6623/  5737 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [36.6% done] [  9847/  1692 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [38.1% done] [  6757/  3490 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [40.5% done] [  3474/  6842 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [41.9% done] [  7402/   785 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [42.2% done] [  2820/  6761 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [44.4% done] [  3246/  5818 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [45.7% done] [  3714/  4221 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [47.8% done] [  5526/  2023 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [48.9% done] [  3409/  3474 kb/s] [eta 00m:24s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31562, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31561, got signal=6
Threads: 1: [m__] [50.0% done] [  4010/  1836 kb/s] [eta 00m:24s]
Threads: 1: [m__] [55.6% done] [  6501/  2417 kb/s] [eta 00m:20s]
Threads: 1: [m__] [61.9% done] [  5661/  2953 kb/s] [eta 00m:16s]
Threads: 1: [m__] [67.5% done] [  8118/     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=31560, got signal=6

fio: (groupid=0): err= 0: pid=31560
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=1.5%, 4=25.0%, 8=73.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.1%, 10=0.7%, 20=4.6%, 50=39.5%, 100=11.0%
     lat (msec): 250=26.5%, 500=15.0%, 750=1.6%, 1000=0.2%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31561
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.7%, 4=27.8%, 8=70.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.4%, 10=0.7%, 20=2.6%, 50=14.1%, 100=30.3%
     lat (msec): 250=45.7%, 500=5.1%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31562
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=1.4%, 4=27.1%, 8=71.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=1.1%, 20=3.2%, 50=11.0%, 100=29.6%
     lat (msec): 250=51.4%, 500=2.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3452/2277, merge=479/217, ticks=53832/45872, in_queue=99696, util=98.96%
0.20user 0.42system 0:27.81elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2492minor)pagefaults 0swaps