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] [ 15060/   948 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [12.1% done] [ 11864/  6444 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [14.3% done] [  5404/ 11472 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [16.7% done] [ 10016/  3904 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [18.9% done] [  8644/  4060 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [21.1% done] [  7628/  5072 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [23.1% done] [  7108/  5292 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [25.0% done] [  2132/ 10680 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [28.2% done] [  4852/  8848 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [30.0% done] [   928/ 10900 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [32.5% done] [  5824/  6400 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [34.1% done] [  9852/   944 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [36.6% done] [  2672/  8304 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [39.0% done] [  6436/  3980 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [41.5% done] [  5987/  3602 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [42.9% done] [  3811/  6070 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [45.2% done] [  7432/  1576 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [46.5% done] [  3856/  5172 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.7% done] [  5912/  1048 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [48.9% done] [  6253/  2076 kb/s] [eta 00m:23s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22402, got signal=6
Threads: 2: [mm_] [48.9% done] [  1889/  3653 kb/s] [eta 00m:24s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22401, got signal=6
Threads: 1: [m__] [52.2% done] [  4989/  3429 kb/s] [eta 00m:22s]
Threads: 1: [m__] [58.1% done] [  8777/     0 kb/s] [eta 00m:18s]
Threads: 1: [m__] [63.4% done] [  7541/     0 kb/s] [eta 00m:15s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22400, got signal=6

fio: (groupid=0): err= 0: pid=22400
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.6%, 4=22.8%, 8=76.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.1%, 10=0.2%, 20=4.3%, 50=42.8%, 100=7.0%
     lat (msec): 250=28.7%, 500=14.8%, 750=0.9%, 1000=0.5%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22401
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.4%, 4=32.6%, 8=64.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.5%, 10=1.0%, 20=4.5%, 50=15.1%, 100=25.9%
     lat (msec): 250=46.3%, 500=5.9%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22402
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.4%, 4=30.1%, 8=67.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.3%, 10=1.2%, 20=3.4%, 50=11.5%, 100=32.3%
     lat (msec): 250=46.8%, 500=3.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3478/2337, merge=555/243, ticks=58972/84588, in_queue=143560, util=98.72%
0.24user 0.42system 0:27.82elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2500minor)pagefaults 0swaps