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] [6.8% done] [ 11567/  3595 kb/s] [eta 00m:41s]
Threads: 3: [mmm] [9.8% done] [ 16096/     0 kb/s] [eta 00m:37s]
Threads: 3: [mmm] [13.5% done] [ 15336/     0 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [15.4% done] [ 10984/  3643 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [18.4% done] [ 12532/  2063 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [21.6% done] [  5352/  8369 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [24.3% done] [  7266/  5671 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [26.3% done] [  9365/  3536 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [28.9% done] [  9676/  2839 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [32.4% done] [  3068/  9109 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [34.2% done] [  9342/  1480 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [35.9% done] [  5687/  5856 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [38.5% done] [  4214/  6604 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.0% done] [  7538/  2579 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [41.5% done] [  3312/  5698 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [42.9% done] [  3989/  5297 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [46.3% done] [  6443/  3040 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [47.6% done] [  2788/  6293 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [48.8% done] [  4359/  3194 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [51.1% done] [  2240/  6648 kb/s] [eta 00m:22s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25315, got signal=6
Threads: 2: [mm_] [52.2% done] [  4797/  2059 kb/s] [eta 00m:22s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25314, got signal=6
Threads: 1: [m__] [55.6% done] [  2059/  5868 kb/s] [eta 00m:20s]
Threads: 1: [m__] [61.9% done] [  4222/  5190 kb/s] [eta 00m:16s]
Threads: 1: [m__] [67.5% done] [  7936/     0 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25313, got signal=6

fio: (groupid=0): err= 0: pid=25313
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=2.7%, 4=42.4%, 8=54.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.1%, 10=0.4%, 20=7.6%, 50=35.2%, 100=10.2%
     lat (msec): 250=29.7%, 500=12.9%, 750=2.6%, 1000=0.3%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25314
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=3.4%, 4=33.9%, 8=62.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.2%, 4=0.0%, 10=0.4%, 20=4.3%, 50=16.0%, 100=20.5%
     lat (msec): 250=53.3%, 500=3.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25315
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.9%, 2=3.7%, 4=39.3%, 8=56.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.5%, 4=0.1%, 10=0.6%, 20=4.4%, 50=13.2%, 100=31.2%
     lat (msec): 250=45.2%, 500=3.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3339/2504, merge=456/245, ticks=55496/48368, in_queue=103864, util=98.80%
0.18user 0.45system 0:27.63elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2491minor)pagefaults 0swaps