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] [8.6% done] [ 12456/  3668 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [11.8% done] [ 10172/  6096 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [13.9% done] [  1415/ 14481 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [15.4% done] [  6300/  8876 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [17.9% done] [  7496/  5308 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [20.0% done] [  6024/  5372 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [23.1% done] [ 10868/  2160 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [25.6% done] [ 10057/  3487 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [27.5% done] [  5332/  8076 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [29.3% done] [  8272/  4268 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [32.5% done] [  3240/  8776 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [35.0% done] [  4468/  6672 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [37.5% done] [  6160/  4528 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [41.0% done] [  4996/  6236 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [43.6% done] [  5100/  5332 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [45.0% done] [  3352/  7420 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [45.2% done] [  7712/  1464 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [46.5% done] [  6976/     0 kb/s] [eta 00m:23s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4103, got signal=6
Threads: 2: [m_m] [48.8% done] [  6968/   436 kb/s] [eta 00m:22s]
Threads: 2: [m_m] [51.2% done] [  3920/  4448 kb/s] [eta 00m:21s]
Threads: 2: [m_m] [52.3% done] [  5404/  2556 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4104, got signal=6
Threads: 1: [m__] [55.8% done] [  5696/  1748 kb/s] [eta 00m:19s]
Threads: 1: [m__] [61.0% done] [  4000/  5024 kb/s] [eta 00m:16s]
Threads: 1: [m__] [66.7% done] [  4576/  3284 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4102, got signal=6

fio: (groupid=0): err= 0: pid=4102
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.7%, 4=38.6%, 8=57.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.3%, 4=0.0%, 10=3.0%, 20=5.4%, 50=33.0%, 100=17.6%
     lat (msec): 250=25.2%, 500=11.3%, 750=1.7%, 1000=1.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4103
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=2.2%, 4=35.0%, 8=62.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.1%, 10=1.2%, 20=3.7%, 50=25.6%, 100=24.8%
     lat (msec): 250=40.7%, 500=3.2%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4104
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=3.2%, 4=34.0%, 8=62.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.0%, 10=1.2%, 20=3.5%, 50=23.4%, 100=21.9%
     lat (msec): 250=43.6%, 500=4.3%, 750=0.3%, 1000=0.8%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3119/2713, merge=525/112, ticks=49800/35744, in_queue=85544, util=98.68%
0.26user 0.33system 0:27.36elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2492minor)pagefaults 0swaps