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] [13.6% done] [ 12296/  7272 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [17.4% done] [ 15356/  4776 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 13384/  4844 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [  9300/  8292 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 10193/  7038 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [ 12412/  2960 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [  3108/ 14464 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  5776/ 10976 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 11120/  3340 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  8968/  4680 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  7120/  5568 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  5028/  7876 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [  6748/  4008 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  8364/  1148 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  7107/  3051 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  2938/  6581 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [61.3% done] [  4741/  3008 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.5% done] [  6589/  1307 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26878, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26877, got signal=6
Threads: 1: [__m] [65.6% done] [  2367/  6258 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26879, got signal=6

fio: (groupid=0): err= 0: pid=26877
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.6%, 4=30.7%, 8=65.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.4%, 4=0.2%, 10=0.8%, 20=4.9%, 50=15.4%, 100=25.0%
     lat (msec): 250=49.4%, 500=2.2%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26878
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.2%, 4=26.0%, 8=71.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=0.4%, 10=0.2%, 20=2.7%, 50=13.0%, 100=36.4%
     lat (msec): 250=45.4%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26879
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.9%, 4=35.0%, 8=60.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.9%, 4=0.0%, 10=1.0%, 20=7.3%, 50=14.5%, 100=29.6%
     lat (msec): 250=42.2%, 500=3.0%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2853/2483, merge=418/198, ticks=41484/59068, in_queue=100552, util=98.93%
0.28user 0.41system 0:22.30elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2476minor)pagefaults 0swaps