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] [ 10435/  2422 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [11.8% done] [  8424/  4664 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [14.3% done] [  4792/  8948 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [17.1% done] [  7849/  5159 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [19.4% done] [  9108/  2672 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [21.6% done] [  8032/  1252 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [24.3% done] [  6604/  4456 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [27.0% done] [  6355/  4960 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [29.7% done] [  3616/  7308 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [31.6% done] [  6340/  3268 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [33.3% done] [  2540/  7564 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.9% done] [  6016/  3560 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [37.5% done] [  6184/  3396 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [40.0% done] [  6308/  3576 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.5% done] [  5108/  3148 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [43.9% done] [  4144/  4208 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.2% done] [  3200/  6188 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.6% done] [  4496/  3148 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [50.0% done] [  2458/  5813 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [51.2% done] [  3908/  2812 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [52.3% done] [  2992/  3412 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [53.3% done] [  4760/  2912 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [54.3% done] [  6424/     0 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [56.5% done] [  2920/  4736 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [57.4% done] [  2017/  6182 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [58.3% done] [  3591/  4260 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=14602, got signal=6
Threads: 2: [_mm] [59.2% done] [  5936/  2144 kb/s] [eta 00m:20s]
Threads: 2: [_mm] [62.5% done] [  4148/  3852 kb/s] [eta 00m:18s]
Threads: 2: [_mm] [63.3% done] [  5208/  1520 kb/s] [eta 00m:18s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=14603, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=14604, got signal=6

fio: (groupid=0): err= 0: pid=14602
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.1%, 4=19.5%, 8=78.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=1.6%, 20=5.3%, 50=15.6%, 100=7.7%
     lat (msec): 250=63.3%, 500=5.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=14603
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=1.4%, 4=17.3%, 8=80.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.0%, 10=1.1%, 20=2.0%, 50=17.9%, 100=5.8%
     lat (msec): 250=63.3%, 500=7.8%, 750=0.3%, 1000=0.4%, >=2000=0.1%
fio: (groupid=0): err= 0: pid=14604
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.5%, 4=16.7%, 8=81.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.0%, 10=1.1%, 20=2.9%, 50=14.2%, 100=7.7%
     lat (msec): 250=65.4%, 500=7.0%, 750=0.9%, 1000=0.5%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2903/2551, merge=445/482, ticks=69692/43252, in_queue=112940, util=99.22%
0.13user 0.26system 0:33.21elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2518minor)pagefaults 0swaps