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] [  4728/  9441 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [11.8% done] [  6480/  7224 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [15.6% done] [  7092/  7316 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [17.6% done] [  7368/  4464 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [20.6% done] [  4168/  8964 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [23.5% done] [  4240/  7884 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [25.7% done] [  3468/  9032 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [27.8% done] [  3788/  8460 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [29.7% done] [  5240/  5580 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [31.6% done] [  4336/  5072 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [33.3% done] [  4376/  6104 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.9% done] [  8160/  1928 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [38.5% done] [  5012/  4896 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [40.0% done] [  8128/   832 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [42.5% done] [  1517/  8828 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [43.9% done] [  3444/  5772 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [46.3% done] [  4856/  2728 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [47.6% done] [  4020/  3548 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [50.0% done] [  3604/  4272 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [51.2% done] [  7392/     0 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [52.3% done] [  3568/  3332 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [54.5% done] [  5352/  1408 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [55.6% done] [  5224/  1440 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [56.5% done] [  3124/  4168 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [57.4% done] [  3904/  2944 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [58.3% done] [  2024/  5704 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12311, got signal=6
Threads: 2: [_mm] [59.2% done] [  4932/  1100 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12313, got signal=6
Threads: 1: [_m_] [61.2% done] [  5696/  1368 kb/s] [eta 00m:19s]
Threads: 1: [_m_] [66.0% done] [  7247/     0 kb/s] [eta 00m:16s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12312, got signal=6

fio: (groupid=0): err= 0: pid=12311
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.0%, 4=19.5%, 8=79.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.5%, 20=2.1%, 50=19.0%, 100=11.0%
     lat (msec): 250=59.5%, 500=7.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12312
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=18.9%, 8=80.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.0%, 50=23.3%, 100=3.4%
     lat (msec): 250=60.5%, 500=9.4%, 750=0.5%, 1000=0.2%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12313
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.4%, 4=15.6%, 8=82.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.0%, 10=1.4%, 20=1.7%, 50=13.9%, 100=5.0%
     lat (msec): 250=69.0%, 500=7.8%, 750=0.3%, 1000=0.2%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3054/2360, merge=485/419, ticks=63396/46772, in_queue=110168, util=98.90%
0.10user 0.25system 0:32.75elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2509minor)pagefaults 0swaps