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] [11.5% done] [ 11787/  8455 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [14.8% done] [ 13016/  4891 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [18.5% done] [ 13245/  5096 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [21.4% done] [  4560/ 14670 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [25.9% done] [ 12981/  5277 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [30.8% done] [  4938/ 11756 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [34.6% done] [  8160/  7207 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [37.0% done] [  8920/  5706 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [40.7% done] [  5049/ 10606 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [44.4% done] [  9164/  4710 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.4% done] [  9834/  2012 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.3% done] [  5643/  5935 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [51.7% done] [  4639/  7132 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.3% done] [  4974/  5561 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [54.8% done] [  7955/   551 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [58.1% done] [  2949/  6218 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=2302, got signal=6
Threads: 2: [m_m] [59.4% done] [  2355/  6277 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=2303, got signal=6
Threads: 1: [m__] [62.5% done] [  4387/  3989 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 1: [V__] [67.7% done] [   586/  7203 kb/s] [eta 00m:10s]
fio: pid=2301, got signal=6

fio: (groupid=0): err= 0: pid=2301
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=1.3%, 2=5.3%, 4=42.2%, 8=51.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=2.4%, 4=0.0%, 10=1.8%, 20=10.4%, 50=20.6%, 100=25.9%
     lat (msec): 250=34.3%, 500=4.0%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=2302
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.9%, 2=3.9%, 4=38.0%, 8=57.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.1%, 10=0.9%, 20=6.7%, 50=14.9%, 100=36.4%
     lat (msec): 250=38.5%, 500=1.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=2303
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=3.6%, 4=35.9%, 8=59.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.0%, 10=0.3%, 20=3.5%, 50=18.3%, 100=33.4%
     lat (msec): 250=39.1%, 500=3.9%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2592/2817, merge=410/134, ticks=35664/42484, in_queue=78144, util=97.84%
0.32user 0.47system 0:22.41elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2479minor)pagefaults 0swaps