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] [7.7% done] [  8711/  8826 kb/s] [eta 00m:36s]
Threads: 3: [mmm] [9.1% done] [  9936/  6656 kb/s] [eta 00m:40s]
Threads: 3: [mmm] [12.8% done] [ 14194/   299 kb/s] [eta 00m:34s]
Threads: 3: [mmm] [16.7% done] [ 12717/  1343 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [18.9% done] [  9629/  3985 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [22.2% done] [  9542/  3398 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [24.3% done] [  8026/  4942 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [26.3% done] [  5954/  8152 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [28.2% done] [  7829/  3800 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [30.0% done] [  3686/  9956 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [33.3% done] [  6498/  5537 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.9% done] [  6195/  5836 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [38.5% done] [  6144/  5852 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [40.0% done] [  7313/  1772 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.5% done] [  6774/  2945 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [45.0% done] [  3706/  6864 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [47.5% done] [  5529/  2977 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [48.8% done] [  4021/  4103 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [50.0% done] [  4875/  3320 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27746, got signal=6
Threads: 2: [m_m] [51.1% done] [  3769/  3619 kb/s] [eta 00m:22s]
Threads: 2: [m_m] [54.5% done] [  6951/   299 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27747, got signal=6
Threads: 1: [m__] [56.8% done] [  7565/     0 kb/s] [eta 00m:19s]
Threads: 1: [m__] [63.4% done] [  3851/  5431 kb/s] [eta 00m:15s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27745, got signal=6

fio: (groupid=0): err= 0: pid=27745
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=3.7%, 4=35.4%, 8=60.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.9%, 4=0.0%, 10=1.5%, 20=7.8%, 50=25.7%, 100=12.4%
     lat (msec): 250=33.8%, 500=15.2%, 750=0.6%, 1000=0.3%, >=2000=0.4%
fio: (groupid=0): err= 0: pid=27746
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=1.0%, 2=4.0%, 4=42.0%, 8=53.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.1%, 10=0.7%, 20=4.7%, 50=19.0%, 100=24.5%
     lat (msec): 250=45.1%, 500=4.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27747
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=1.2%, 4=27.4%, 8=71.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.0%, 20=1.4%, 50=11.3%, 100=26.1%
     lat (msec): 250=58.1%, 500=2.5%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3235/2522, merge=428/380, ticks=57164/62032, in_queue=119188, util=98.77%
0.24user 0.38system 0:27.19elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2490minor)pagefaults 0swaps