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] [9.7% done] [  5676/ 10460 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [12.5% done] [  7472/  9092 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [15.2% done] [  8928/  7072 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [17.6% done] [  9008/  5140 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [19.4% done] [  3788/ 12508 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [23.5% done] [  5980/  7752 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [25.7% done] [  6378/  6129 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [27.0% done] [  9168/  3852 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [29.7% done] [  6464/  6013 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [31.6% done] [  2623/  9794 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [33.3% done] [  9314/  1216 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [36.8% done] [  8696/  3457 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [40.5% done] [  4777/  6006 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [44.4% done] [  4044/  7427 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [45.9% done] [  9219/     0 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [47.4% done] [  6163/  4218 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [50.0% done] [  5167/  3524 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [51.3% done] [  5053/  3008 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [53.8% done] [  4225/  4344 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [55.0% done] [  1685/  6317 kb/s] [eta 00m:18s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22741, got signal=6
Threads: 2: [m_m] [56.1% done] [  5541/  1232 kb/s] [eta 00m:18s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22742, got signal=6
Threads: 1: [m__] [56.8% done] [  3580/  3493 kb/s] [eta 00m:19s]
Threads: 1: [m__] [63.4% done] [  7743/     0 kb/s] [eta 00m:15s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22740, got signal=6

fio: (groupid=0): err= 0: pid=22740
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=2.9%, 4=41.6%, 8=54.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=0.1%, 10=0.8%, 20=7.0%, 50=27.6%, 100=16.4%
     lat (msec): 250=34.3%, 500=10.2%, 750=2.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22741
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=3.1%, 4=34.2%, 8=62.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.0%, 10=1.1%, 20=5.5%, 50=15.9%, 100=26.1%
     lat (msec): 250=43.3%, 500=6.8%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22742
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=2.6%, 4=28.0%, 8=68.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.1%, 10=0.8%, 20=3.5%, 50=12.4%, 100=24.8%
     lat (msec): 250=52.7%, 500=4.6%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2986/2759, merge=390/388, ticks=52536/57988, in_queue=110516, util=99.04%
0.31user 0.34system 0:27.19elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2493minor)pagefaults 0swaps