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] [6.4% done] [ 15424/  1796 kb/s] [eta 00m:44s]
Threads: 3: [mmm] [9.1% done] [  7176/  9008 kb/s] [eta 00m:40s]
Threads: 3: [mmm] [11.6% done] [  2136/ 14832 kb/s] [eta 00m:38s]
Threads: 3: [mmm] [14.3% done] [ 10692/  3720 kb/s] [eta 00m:36s]
Threads: 3: [mmm] [16.7% done] [  9992/  3500 kb/s] [eta 00m:35s]
Threads: 3: [mmm] [20.0% done] [ 11836/  1592 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [23.1% done] [  4860/  8344 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [25.6% done] [  6004/  6772 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [28.2% done] [  8364/  2968 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [29.3% done] [  5378/  7709 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [31.7% done] [  8676/  3280 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [35.0% done] [  3928/  8124 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [39.5% done] [  3508/  8884 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [41.0% done] [  4684/  5168 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [43.6% done] [  7696/  1788 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [45.0% done] [  3820/  6480 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [46.3% done] [  3844/  4584 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [50.0% done] [  3420/  4700 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [51.2% done] [  4832/  3776 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [52.4% done] [  1228/  5744 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31582, got signal=6
Threads: 2: [m_m] [53.5% done] [  1952/  6376 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31583, got signal=6
Threads: 1: [m__] [55.8% done] [  4076/  1960 kb/s] [eta 00m:19s]
Threads: 1: [m__] [62.5% done] [   932/  9640 kb/s] [eta 00m:15s]
Threads: 1: [m__] [66.7% done] [  6152/   440 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31581, got signal=6

fio: (groupid=0): err= 0: pid=31581
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.9%, 2=4.2%, 4=37.0%, 8=57.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.4%, 4=0.0%, 10=2.4%, 20=4.6%, 50=33.0%, 100=10.2%
     lat (msec): 250=35.3%, 500=11.8%, 750=0.9%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31582
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=5.1%, 4=38.1%, 8=56.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.0%, 4=0.1%, 10=1.7%, 20=5.3%, 50=19.0%, 100=21.7%
     lat (msec): 250=46.2%, 500=4.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31583
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=3.3%, 4=37.2%, 8=58.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.2%, 4=0.0%, 10=1.7%, 20=5.5%, 50=17.7%, 100=22.8%
     lat (msec): 250=44.4%, 500=5.9%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2879/2935, merge=350/237, ticks=52252/51672, in_queue=103920, util=98.99%
0.21user 0.36system 0:27.18elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2499minor)pagefaults 0swaps