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] [8.8% done] [ 15314/  2074 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [11.8% done] [  8804/  7540 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [15.2% done] [ 11068/  4804 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [18.8% done] [  9344/  5396 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [21.2% done] [  8964/  5188 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [23.5% done] [  5304/  7796 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [25.0% done] [  7704/  5308 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [27.0% done] [  9548/  1988 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [30.6% done] [  6256/  6908 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [33.3% done] [  8664/  3656 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [35.1% done] [  5972/  7068 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [36.8% done] [  4116/  8716 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [37.5% done] [  7424/  2932 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [41.0% done] [  6272/  2580 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [42.5% done] [  4968/  5744 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [43.9% done] [  6080/  3592 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [46.3% done] [  1328/  8520 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [48.8% done] [  3116/  5960 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [50.0% done] [  5040/  3308 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 3: [mmm] [50.0% done] [  6056/  1076 kb/s] [eta 00m:22s]
fio: pid=23070, got signal=6
Threads: 2: [m_m] [52.3% done] [  3192/  4968 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23071, got signal=6
Threads: 1: [m__] [57.1% done] [  6404/  1988 kb/s] [eta 00m:18s]
Threads: 1: [m__] [62.5% done] [  8408/     0 kb/s] [eta 00m:15s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23069, got signal=6

fio: (groupid=0): err= 0: pid=23069
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.2%, 4=37.1%, 8=60.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.1%, 10=1.5%, 20=3.0%, 50=37.8%, 100=12.2%
     lat (msec): 250=29.7%, 500=12.6%, 750=2.1%, 1000=0.2%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23070
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.2%, 4=30.3%, 8=65.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.1%, 4=0.2%, 10=0.9%, 20=2.6%, 50=16.4%, 100=23.3%
     lat (msec): 250=51.3%, 500=3.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23071
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=3.4%, 4=34.1%, 8=61.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.0%, 4=0.0%, 10=2.3%, 20=3.2%, 50=14.8%, 100=25.3%
     lat (msec): 250=49.3%, 500=3.5%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3365/2281, merge=398/354, ticks=57512/121504, in_queue=179016, util=99.03%
0.22user 0.41system 0:26.93elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2489minor)pagefaults 0swaps