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] [10.0% done] [  8988/  5988 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [13.3% done] [ 13632/  2900 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [16.1% done] [ 15032/     0 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [19.4% done] [  8112/  7020 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [20.0% done] [  9684/  4844 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [22.9% done] [  6408/  5088 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [25.0% done] [  9652/  2844 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [28.6% done] [  9168/  4404 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [30.6% done] [  5180/  8280 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [31.6% done] [  4684/  8008 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [34.2% done] [  7876/  3864 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [35.9% done] [  6536/  5204 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [37.5% done] [  2928/  8908 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [39.0% done] [  4420/  5788 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [41.5% done] [  6652/  2144 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [42.9% done] [  3648/  6216 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [44.2% done] [  5236/  2840 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [46.5% done] [  2736/  6964 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.7% done] [  3408/  4164 kb/s] [eta 00m:23s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 3: [mmm] [48.9% done] [  1368/  6436 kb/s] [eta 00m:23s]
fio: pid=13827, got signal=6
Threads: 2: [m_m] [51.1% done] [  2404/  5484 kb/s] [eta 00m:22s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13828, got signal=6
Threads: 1: [m__] [54.5% done] [  4800/  4612 kb/s] [eta 00m:20s]
Threads: 1: [m__] [61.0% done] [  9060/     0 kb/s] [eta 00m:16s]
Threads: 1: [m__] [66.7% done] [  4988/  2648 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13826, got signal=6

fio: (groupid=0): err= 0: pid=13826
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=2.7%, 4=40.2%, 8=56.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.4%, 4=0.1%, 10=1.5%, 20=4.1%, 50=38.7%, 100=9.0%
     lat (msec): 250=29.9%, 500=13.6%, 750=0.6%, 1000=0.8%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13827
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=5.5%, 4=39.3%, 8=54.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.5%, 4=0.2%, 10=1.9%, 20=3.5%, 50=16.7%, 100=27.6%
     lat (msec): 250=44.7%, 500=3.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13828
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=2.5%, 4=27.7%, 8=69.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.1%, 10=0.6%, 20=3.5%, 50=13.6%, 100=27.3%
     lat (msec): 250=47.8%, 500=6.0%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3179/2584, merge=488/158, ticks=57212/80900, in_queue=138112, util=99.00%
0.22user 0.35system 0:27.29elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2495minor)pagefaults 0swaps