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] [8.1% done] [  8403/  5614 kb/s] [eta 00m:34s]
Threads: 3: [mmm] [11.1% done] [ 12568/     0 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [14.3% done] [  5860/  7784 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [17.6% done] [  8188/  5100 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [20.6% done] [  8012/  4644 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [22.9% done] [  5076/  7088 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [25.0% done] [  6276/  4232 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [27.0% done] [  9572/     0 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [29.7% done] [  6676/  5044 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [31.6% done] [  4912/  3856 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [33.3% done] [  6592/  3236 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.0% done] [  6692/  2404 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [37.5% done] [  3664/  5552 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [39.0% done] [  3072/  6828 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [41.5% done] [  5988/  2548 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [42.9% done] [  4656/  4040 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [45.2% done] [  4788/  3440 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [46.5% done] [  3944/  3664 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.7% done] [  6300/  1268 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [50.0% done] [  5028/  3072 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [52.3% done] [  5356/  2016 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [53.3% done] [  3116/  2948 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [54.3% done] [  2676/  3352 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [56.5% done] [  6680/     0 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [57.4% done] [  5736/  1092 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [57.1% done] [  5856/  2456 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] [58.0% done] [  6204/   640 kb/s] [eta 00m:21s]
fio: pid=15176, got signal=6
Threads: 2: [m_m] [59.6% done] [  4137/  2913 kb/s] [eta 00m:21s]
Threads: 2: [m_m] [59.3% done] [  3240/  2512 kb/s] [eta 00m:22s]
fio: pid=15175, got signal=6
Threads: 1: [__m] [64.7% done] [  5908/  1260 kb/s] [eta 00m:18s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15177, got signal=6

fio: (groupid=0): err= 0: pid=15175
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.4%, 4=18.7%, 8=79.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=1.0%, 20=2.9%, 50=18.8%, 100=8.5%
     lat (msec): 250=62.7%, 500=5.0%, 750=0.9%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15176
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=1.0%, 4=17.0%, 8=81.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.5%, 20=2.2%, 50=18.9%, 100=5.8%
     lat (msec): 250=65.1%, 500=6.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15177
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.5%, 4=14.8%, 8=84.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.0%, 10=0.4%, 20=1.1%, 50=20.8%, 100=3.2%
     lat (msec): 250=63.5%, 500=8.8%, 750=0.9%, 1000=0.2%, >=2000=0.5%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3613/1928, merge=671/277, ticks=78784/38084, in_queue=116872, util=98.50%
0.10user 0.38system 0:34.34elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2510minor)pagefaults 0swaps