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] [10.3% done] [ 13500/   908 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [12.9% done] [ 13828/  2808 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [16.7% done] [  5668/ 10004 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [18.8% done] [  5348/  9256 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [21.9% done] [  9256/  4304 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [24.2% done] [ 10500/  3356 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [26.5% done] [  2952/  8552 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [28.6% done] [  7000/  7764 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [32.4% done] [  8716/  2200 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [34.3% done] [  7456/  4896 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [37.1% done] [  7172/  4600 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [38.9% done] [  8804/  2560 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [40.5% done] [  8892/   916 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [42.1% done] [  8912/  1289 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [44.7% done] [  7800/  2536 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [46.2% done] [  5344/  4052 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [47.5% done] [  3284/  4976 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [50.0% done] [  5840/  3060 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [51.2% done] [  1856/  5364 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [52.4% done] [  3600/  5044 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [53.5% done] [  4068/  4340 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17265, got signal=6
Threads: 2: [mm_] [54.5% done] [  5552/   848 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17264, got signal=6
Threads: 1: [m__] [58.1% done] [  5708/  3808 kb/s] [eta 00m:18s]
Threads: 1: [m__] [65.0% done] [  3048/  6544 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17263, got signal=6

fio: (groupid=0): err= 0: pid=17263
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=3.7%, 4=32.7%, 8=63.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=0.2%, 10=3.5%, 20=7.5%, 50=26.3%, 100=11.9%
     lat (msec): 250=34.5%, 500=14.5%, 750=0.5%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17264
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=1.5%, 4=22.4%, 8=75.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.3%, 10=0.4%, 20=3.5%, 50=10.9%, 100=24.0%
     lat (msec): 250=55.1%, 500=4.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17265
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=2.9%, 4=27.9%, 8=68.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.2%, 10=0.7%, 20=4.1%, 50=12.4%, 100=33.0%
     lat (msec): 250=46.3%, 500=2.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3331/2544, merge=663/177, ticks=57688/72656, in_queue=130344, util=98.58%
0.21user 0.36system 0:27.94elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2494minor)pagefaults 0swaps