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] [10.7% done] [  7648/ 10736 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [13.8% done] [ 12416/  3184 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [16.1% done] [ 11308/  3408 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [20.0% done] [ 10440/  3144 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [22.6% done] [  3028/ 11088 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [25.0% done] [  9404/  3628 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [26.5% done] [  7328/  6588 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [30.3% done] [  6712/  7736 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [32.4% done] [ 11840/     0 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [34.3% done] [  8376/  4836 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [37.1% done] [  8144/  3360 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [40.0% done] [  4152/  8116 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [41.7% done] [  5736/  5408 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [44.4% done] [  8960/     0 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [44.7% done] [  5464/  4296 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [47.4% done] [  4648/  4840 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [47.5% done] [  3328/  5212 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [48.8% done] [  4580/  4504 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [51.2% done] [  6072/  1808 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [52.4% done] [  2568/  5056 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [54.8% done] [  5496/  1676 kb/s] [eta 00m:19s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21833, got signal=6
Threads: 2: [m_m] [54.5% done] [  1796/  6040 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21834, got signal=6
Threads: 1: [m__] [59.5% done] [  6968/  2160 kb/s] [eta 00m:17s]
Threads: 1: [m__] [65.0% done] [  4904/  3816 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21832, got signal=6

fio: (groupid=0): err= 0: pid=21832
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=3.6%, 4=35.9%, 8=59.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.0%, 10=2.0%, 20=5.2%, 50=30.7%, 100=11.8%
     lat (msec): 250=33.0%, 500=15.4%, 750=0.7%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21833
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=3.2%, 4=28.7%, 8=67.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.0%, 4=0.0%, 10=1.5%, 20=2.9%, 50=12.7%, 100=25.5%
     lat (msec): 250=52.2%, 500=3.5%, 750=0.5%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21834
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=3.1%, 4=36.8%, 8=59.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=1.1%, 20=3.1%, 50=14.5%, 100=24.3%
     lat (msec): 250=52.2%, 500=4.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3192/2582, merge=555/204, ticks=57240/69976, in_queue=127216, util=99.06%
0.22user 0.37system 0:27.46elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2493minor)pagefaults 0swaps