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] [9.4% done] [  6932/  9415 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [13.8% done] [ 11735/  6485 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [15.6% done] [  5469/  9658 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [18.8% done] [  6895/  8655 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [21.2% done] [  6249/  6156 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [23.5% done] [  9012/  5973 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [26.5% done] [ 11125/   918 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [28.6% done] [  7216/  5010 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [29.7% done] [  8342/  3348 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [32.4% done] [  8029/  4929 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [33.3% done] [  8513/  3982 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.9% done] [  6139/  4778 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [37.5% done] [  7342/  3957 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [39.0% done] [  3458/  7549 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [41.5% done] [  6656/  1999 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [43.9% done] [  6680/  3458 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [46.3% done] [  4973/  3835 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [47.6% done] [  2336/  6408 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [50.0% done] [  4173/  3722 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [51.2% done] [  4977/  3429 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] [51.1% done] [  1044/  6521 kb/s] [eta 00m:22s]
fio: pid=23466, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23467, got signal=6
Threads: 1: [m__] [52.2% done] [  1982/  5627 kb/s] [eta 00m:22s]
Threads: 1: [m__] [59.5% done] [  4584/  5594 kb/s] [eta 00m:17s]
Threads: 1: [m__] [65.0% done] [  7972/     0 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23465, got signal=6

fio: (groupid=0): err= 0: pid=23465
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=1.7%, 4=28.4%, 8=69.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.3%, 10=0.7%, 20=5.2%, 50=36.9%, 100=8.6%
     lat (msec): 250=32.9%, 500=13.0%, 750=0.8%, 1000=0.5%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23466
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=1.9%, 4=30.1%, 8=67.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.5%, 10=1.0%, 20=5.3%, 50=14.8%, 100=22.0%
     lat (msec): 250=52.1%, 500=3.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23467
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=2.3%, 4=31.5%, 8=65.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.4%, 10=2.0%, 20=4.2%, 50=16.0%, 100=24.4%
     lat (msec): 250=46.8%, 500=5.1%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3039/2697, merge=412/273, ticks=51688/74976, in_queue=126660, util=98.92%
0.18user 0.46system 0:27.29elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2517minor)pagefaults 0swaps