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] [7.1% done] [  5128/  9364 kb/s] [eta 00m:39s]
Threads: 3: [mmm] [9.5% done] [  8984/  3176 kb/s] [eta 00m:38s]
Threads: 3: [mmm] [11.9% done] [  4900/  7676 kb/s] [eta 00m:37s]
Threads: 3: [mmm] [14.3% done] [ 10244/  2864 kb/s] [eta 00m:36s]
Threads: 3: [mmm] [15.9% done] [  6892/  3844 kb/s] [eta 00m:37s]
Threads: 3: [mmm] [18.2% done] [  9796/  2680 kb/s] [eta 00m:36s]
Threads: 3: [mmm] [20.0% done] [  6032/  4676 kb/s] [eta 00m:36s]
Threads: 3: [mmm] [21.3% done] [  8172/    52 kb/s] [eta 00m:37s]
Threads: 3: [mmm] [23.9% done] [  4772/  8136 kb/s] [eta 00m:35s]
Threads: 3: [mmm] [25.5% done] [  7768/  2988 kb/s] [eta 00m:35s]
Threads: 3: [mmm] [27.7% done] [  5693/  4300 kb/s] [eta 00m:34s]
Threads: 3: [mmm] [29.2% done] [  2824/  5288 kb/s] [eta 00m:34s]
Threads: 3: [mmm] [31.2% done] [  5396/  3924 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [32.7% done] [  7020/  1368 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [34.7% done] [  5908/  2432 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [36.7% done] [  4396/  3563 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [38.0% done] [  5496/  2640 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [39.2% done] [  4776/  2236 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [41.2% done] [  5260/  2060 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [42.3% done] [  3968/  4624 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [43.4% done] [  4091/  2998 kb/s] [eta 00m:30s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=1489, got signal=6
Threads: 2: [m_m] [45.3% done] [  3108/  4500 kb/s] [eta 00m:29s]
Threads: 2: [m_m] [47.2% done] [  6141/   528 kb/s] [eta 00m:28s]
Threads: 2: [m_m] [50.0% done] [  2404/  5720 kb/s] [eta 00m:26s]
Threads: 2: [m_m] [51.9% done] [  2288/  4372 kb/s] [eta 00m:25s]
Threads: 2: [m_m] [53.8% done] [  4000/  2048 kb/s] [eta 00m:24s]
Threads: 2: [m_m] [55.8% done] [  2852/  2792 kb/s] [eta 00m:23s]
Threads: 2: [m_m] [58.8% done] [  5064/   372 kb/s] [eta 00m:21s]
Threads: 2: [m_m] [59.6% done] [  2148/  2792 kb/s] [eta 00m:21s]
Threads: 2: [m_m] [61.5% done] [  2468/  3096 kb/s] [eta 00m:20s]
Threads: 2: [m_m] [63.5% done] [  3848/   920 kb/s] [eta 00m:19s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=1490, got signal=6
Threads: 1: [m__] [66.0% done] [  4484/  1792 kb/s] [eta 00m:18s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=1488, got signal=6

fio: (groupid=0): err= 0: pid=1488
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=0.4%, 4=13.5%, 8=85.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.0%, 10=0.3%, 20=1.3%, 50=11.7%, 100=17.0%
     lat (msec): 250=50.9%, 500=17.7%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=1489
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.1%, 4=14.8%, 8=83.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=1.0%, 20=1.8%, 50=6.8%, 100=19.8%
     lat (msec): 250=69.0%, 500=1.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=1490
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=0.8%, 4=8.9%, 8=90.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.0%, 10=0.4%, 20=0.2%, 50=2.7%, 100=20.5%
     lat (msec): 250=57.8%, 500=17.1%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3395/2318, merge=716/344, ticks=74324/43096, in_queue=117424, util=99.31%
0.10user 0.26system 0:35.58elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2516minor)pagefaults 0swaps