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] [9.1% done] [  6151/  6967 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [11.4% done] [  6522/  6336 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [14.7% done] [  3934/  9582 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [17.1% done] [  5675/  7297 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [20.0% done] [  3906/  8448 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [22.2% done] [  5509/  5726 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [25.0% done] [  9692/  1736 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [26.3% done] [  2823/  5702 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [29.7% done] [  2343/  8932 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [32.4% done] [  3690/  6959 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [34.2% done] [  6545/  3812 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [36.8% done] [  4316/  4714 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [38.5% done] [  7301/  2138 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.0% done] [  4159/  5360 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [42.5% done] [  7924/    70 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.0% done] [  4797/  4911 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [46.3% done] [  6108/  1539 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [47.7% done] [  2138/  5966 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [50.0% done] [  2496/  5265 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [51.1% done] [  4773/  3324 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [53.3% done] [  4155/  3068 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [54.3% done] [  4710/  1819 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [55.3% done] [  5387/  1595 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [56.2% done] [  5190/  1855 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [57.1% done] [  2800/  3903 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [58.0% done] [  2142/  4611 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15282, got signal=6
Threads: 2: [_mm] [60.0% done] [  3087/  3347 kb/s] [eta 00m:20s]
Threads: 2: [_mm] [63.3% done] [  6628/  1532 kb/s] [eta 00m:18s]
Threads: 2: [_mm] [64.0% done] [  6144/     0 kb/s] [eta 00m:18s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15283, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15284, got signal=6

fio: (groupid=0): err= 0: pid=15282
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=1.7%, 4=21.2%, 8=76.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=0.0%, 10=0.4%, 20=5.6%, 50=17.1%, 100=8.4%
     lat (msec): 250=61.6%, 500=5.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15283
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=0.6%, 4=15.8%, 8=83.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.3%, 20=2.3%, 50=16.7%, 100=4.1%
     lat (msec): 250=67.3%, 500=8.3%, 750=0.7%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15284
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.6%, 4=19.0%, 8=79.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.0%, 10=0.8%, 20=4.9%, 50=13.7%, 100=7.0%
     lat (msec): 250=65.1%, 500=6.9%, 750=0.3%, 1000=0.4%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3042/2581, merge=521/356, ticks=66756/47700, in_queue=114456, util=99.13%
0.07user 0.25system 0:33.66elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2517minor)pagefaults 0swaps