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] [7.3% done] [  4493/ 12721 kb/s] [eta 00m:38s]
Threads: 3: [mmm] [9.8% done] [  2473/ 14182 kb/s] [eta 00m:37s]
Threads: 3: [mmm] [12.5% done] [  8030/  8306 kb/s] [eta 00m:35s]
Threads: 3: [mmm] [16.2% done] [  9349/  5155 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [17.1% done] [ 11957/   382 kb/s] [eta 00m:34s]
Threads: 3: [mmm] [20.0% done] [  8542/  5167 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [21.4% done] [  7451/  4635 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [24.4% done] [  5293/  8747 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [27.5% done] [  7215/  5332 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [29.3% done] [  9078/  2638 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [31.7% done] [  6994/  4143 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [34.1% done] [ 10082/  1197 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [35.7% done] [  4946/  5710 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [37.2% done] [  4363/  6435 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [40.5% done] [  3554/  5665 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [41.9% done] [  3800/  5344 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [43.2% done] [  6852/  2196 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [44.4% done] [  4440/  3288 kb/s] [eta 00m:25s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26916, got signal=6
Threads: 2: [m_m] [46.7% done] [  7348/   692 kb/s] [eta 00m:24s]
Threads: 2: [m_m] [48.9% done] [  7612/     0 kb/s] [eta 00m:23s]
Threads: 2: [m_m] [53.5% done] [  4732/  3716 kb/s] [eta 00m:20s]
Threads: 2: [m_m] [58.5% done] [  1128/  7640 kb/s] [eta 00m:17s]
Threads: 2: [m_m] [62.5% done] [   316/  8572 kb/s] [eta 00m:15s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26917, got signal=6
Threads: 1: [m__] [65.9% done] [  3440/  3304 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26915, got signal=6

fio: (groupid=0): err= 0: pid=26915
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=1.0%, 2=5.2%, 4=38.9%, 8=54.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.1%, 10=2.6%, 20=9.4%, 50=24.8%, 100=18.0%
     lat (msec): 250=29.6%, 500=13.2%, 750=0.6%, 1000=0.7%, >=2000=0.1%
fio: (groupid=0): err= 0: pid=26916
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=3.5%, 4=39.5%, 8=56.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.0%, 10=0.1%, 20=4.2%, 50=20.4%, 100=27.3%
     lat (msec): 250=43.3%, 500=3.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26917
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.3%, 4=27.6%, 8=70.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.2%, 20=1.3%, 50=8.8%, 100=32.1%
     lat (msec): 250=51.7%, 500=4.9%, 750=0.5%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3105/2658, merge=301/366, ticks=56596/61036, in_queue=117632, util=98.78%
0.23user 0.45system 0:27.66elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2487minor)pagefaults 0swaps