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] [9.7% done] [ 11720/  5912 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [14.3% done] [ 11764/  4292 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [17.9% done] [ 10524/  5580 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [20.7% done] [  3432/ 11636 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [24.1% done] [  8248/  5432 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [27.6% done] [ 10396/  2516 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [29.0% done] [  9912/  3456 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [30.3% done] [  8920/  3024 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [32.4% done] [  9628/  3684 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [34.3% done] [  5312/  7056 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [35.1% done] [  4812/  7564 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [36.8% done] [  5332/  6072 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [39.5% done] [ 11032/    40 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [42.1% done] [  8172/  1564 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [43.6% done] [  5168/  5444 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [45.0% done] [  7684/   648 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [47.5% done] [  5877/  1725 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [48.8% done] [  4656/  3604 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [48.8% done] [  4108/  4716 kb/s] [eta 00m:22s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26735, got signal=6
Threads: 2: [m_m] [48.9% done] [  4284/  1757 kb/s] [eta 00m:23s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 2: [m_m] [48.9% done] [  1376/  6664 kb/s] [eta 00m:24s]
fio: pid=26736, got signal=6
Threads: 1: [m__] [55.8% done] [  5704/  3304 kb/s] [eta 00m:19s]
Threads: 1: [m__] [61.0% done] [  8872/     0 kb/s] [eta 00m:16s]
Threads: 1: [m__] [66.7% done] [  3912/  4428 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26734, got signal=6

fio: (groupid=0): err= 0: pid=26734
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.1%, 4=32.1%, 8=65.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.0%, 10=1.5%, 20=2.6%, 50=39.7%, 100=9.7%
     lat (msec): 250=30.2%, 500=12.9%, 750=1.3%, 1000=1.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26735
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=3.3%, 4=36.5%, 8=59.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=0.0%, 10=2.2%, 20=4.4%, 50=26.3%, 100=18.2%
     lat (msec): 250=41.7%, 500=6.0%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26736
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=1.1%, 2=3.9%, 4=32.3%, 8=62.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.0%, 10=1.7%, 20=3.9%, 50=19.8%, 100=22.8%
     lat (msec): 250=44.7%, 500=4.9%, 750=0.9%, 1000=0.3%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3419/2459, merge=404/125, ticks=58112/26404, in_queue=84516, util=98.98%
0.24user 0.24system 0:27.24elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2486minor)pagefaults 0swaps