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: 0
Threads: 3
Threads: 3
Threads: 3: [mmm] [9.1% done] [  2812/ 11276 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [11.1% done] [  7964/  3780 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [14.3% done] [  9312/  3440 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [16.7% done] [  5360/  7952 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [19.4% done] [  6516/  5608 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [21.6% done] [  6076/  4888 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [24.3% done] [  8216/  3136 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [27.0% done] [  8348/  1220 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [28.9% done] [  6116/  3960 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [30.8% done] [  7220/  1988 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [33.3% done] [  4828/  6404 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.0% done] [  5492/  4096 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [37.5% done] [  6452/  3688 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [39.0% done] [  9152/     0 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [41.5% done] [  6969/  1970 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [42.9% done] [  4757/  3771 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [44.2% done] [  5188/  3164 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [46.5% done] [  3223/  4464 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [48.8% done] [   812/  8784 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [51.2% done] [  3440/  3828 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [52.3% done] [  4264/  2672 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [54.5% done] [  4692/  2690 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [55.6% done] [  3764/  2920 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [56.5% done] [  2440/  5228 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [57.4% done] [  1708/  6080 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [58.3% done] [  3108/  2748 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12668, got signal=6
Threads: 2: [_mm] [59.2% done] [  1696/  6740 kb/s] [eta 00m:20s]
Threads: 2: [_mm] [61.2% done] [  6304/     0 kb/s] [eta 00m:19s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 2: [_mm] [62.0% done] [  2572/  4820 kb/s] [eta 00m:19s]
fio: pid=12669, got signal=6
Threads: 1: [__m] [66.7% done] [  5285/  1621 kb/s] [eta 00m:16s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12670, got signal=6

fio: (groupid=0): err= 0: pid=12668
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=2.2%, 4=21.9%, 8=75.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.0%, 10=2.1%, 20=3.5%, 50=17.7%, 100=9.7%
     lat (msec): 250=59.6%, 500=6.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12669
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=1.3%, 4=17.1%, 8=81.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.0%, 10=1.4%, 20=4.1%, 50=16.6%, 100=5.6%
     lat (msec): 250=62.1%, 500=8.9%, 750=0.7%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12670
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=1.1%, 4=16.8%, 8=81.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.0%, 10=1.7%, 20=1.9%, 50=17.2%, 100=4.5%
     lat (msec): 250=65.1%, 500=7.7%, 750=0.5%, 1000=0.2%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2993/2576, merge=538/402, ticks=72940/39996, in_queue=112936, util=98.90%
0.10user 0.41system 0:35.71elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2523minor)pagefaults 0swaps