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] [12.0% done] [ 10520/ 10388 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [16.7% done] [ 11564/  9668 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [19.2% done] [ 10260/  5920 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [22.2% done] [ 14192/  3776 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [28.0% done] [  9596/  9972 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [30.8% done] [ 13952/  1296 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [34.6% done] [ 10712/  3716 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [ 10848/  3384 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [  9616/  5168 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [  8288/  6348 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [  4520/  9584 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  4876/  7556 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  4872/  6576 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  3640/  8312 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  5528/  3908 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  8020/     0 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [59.4% done] [  8075/     0 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23801, got signal=6
Threads: 2: [m_m] [62.5% done] [  4672/  3764 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23800, got signal=6
Threads: 1: [__m] [65.6% done] [  4648/  4000 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23802, got signal=6

fio: (groupid=0): err= 0: pid=23800
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=4.2%, 4=35.3%, 8=59.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.1%, 10=1.2%, 20=3.8%, 50=18.7%, 100=28.8%
     lat (msec): 250=43.3%, 500=2.5%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23801
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.4%, 4=30.3%, 8=66.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.1%, 10=1.3%, 20=3.5%, 50=15.4%, 100=35.5%
     lat (msec): 250=42.4%, 500=0.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23802
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=2.3%, 4=30.3%, 8=66.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.3%, 10=1.4%, 20=4.2%, 50=19.9%, 100=26.6%
     lat (msec): 250=43.1%, 500=2.5%, 750=0.2%, 1000=0.0%, >=2000=0.5%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3105/2106, merge=623/200, ticks=41752/30968, in_queue=72700, util=98.86%
0.26user 0.34system 0:22.29elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2483minor)pagefaults 0swaps