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] [12.5% done] [ 13238/  7037 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [ 12377/  6200 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [  7525/ 11454 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [  4668/ 14543 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [  8216/ 11255 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [  9317/  8053 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [34.6% done] [  5875/ 10430 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [37.0% done] [ 13234/  1670 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [40.7% done] [  9159/  5485 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.9% done] [  9427/  4673 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [46.4% done] [  5026/  8992 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.3% done] [  6074/  4632 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [51.7% done] [  6062/  5107 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [55.2% done] [  7578/  2620 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  5749/  2962 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  7147/  2068 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [61.3% done] [  5140/  3559 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.5% done] [  4518/  3900 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=24883, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=24884, got signal=6
Threads: 1: [m__] [61.8% done] [  5875/   369 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 1: [m__] [66.7% done] [  3632/  4758 kb/s] [eta 00m:11s]
fio: pid=24882, got signal=6

fio: (groupid=0): err= 0: pid=24882
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.1%, 4=28.6%, 8=68.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.0%, 4=1.0%, 10=1.4%, 20=4.4%, 50=18.0%, 100=25.3%
     lat (msec): 250=44.6%, 500=3.2%, 750=0.7%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=24883
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=1.6%, 4=27.8%, 8=70.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.3%, 10=1.1%, 20=3.7%, 50=14.1%, 100=37.9%
     lat (msec): 250=41.5%, 500=1.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=24884
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.9%, 4=28.9%, 8=68.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.2%, 10=1.0%, 20=4.0%, 50=17.0%, 100=34.4%
     lat (msec): 250=40.6%, 500=2.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3024/2402, merge=397/226, ticks=39384/50068, in_queue=89452, util=98.72%
0.24user 0.40system 0:22.66elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2477minor)pagefaults 0swaps