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] [10.7% done] [ 13840/  5248 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [14.3% done] [ 15836/  2044 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [18.5% done] [  8424/ 10224 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [22.2% done] [ 15028/  3020 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [25.0% done] [  3532/ 16872 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [28.6% done] [ 11608/  3640 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [32.1% done] [ 12636/  3760 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [35.7% done] [  5336/ 11564 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [39.3% done] [  7620/  7268 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [42.9% done] [  8372/  5556 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [46.4% done] [  8064/  5100 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.3% done] [  8912/  2272 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [51.7% done] [  7592/  2140 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [55.2% done] [  5920/  5724 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  4332/  5460 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  3840/  5976 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [59.4% done] [  2880/  4916 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [60.6% done] [  4376/  3360 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=32637, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=32636, got signal=6
Threads: 1: [m__] [63.6% done] [  4388/  3096 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=32635, got signal=6

fio: (groupid=0): err= 0: pid=32635
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=2.3%, 4=34.1%, 8=62.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.3%, 10=1.2%, 20=5.1%, 50=22.3%, 100=25.8%
     lat (msec): 250=39.3%, 500=4.7%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=32636
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=1.4%, 4=25.4%, 8=73.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.2%, 10=0.3%, 20=1.8%, 50=14.1%, 100=38.7%
     lat (msec): 250=42.3%, 500=2.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=32637
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=3.0%, 4=33.8%, 8=62.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.0%, 10=1.9%, 20=5.8%, 50=14.7%, 100=27.5%
     lat (msec): 250=48.0%, 500=1.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3170/2253, merge=504/244, ticks=46120/72324, in_queue=118444, util=99.07%
0.24user 0.41system 0:22.82elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2473minor)pagefaults 0swaps