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] [ 10185/ 12296 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [16.7% done] [ 12616/  5328 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 13736/  4540 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 11632/  5336 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [ 11284/  6776 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [30.8% done] [ 14752/     0 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.1% done] [  7184/  8992 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [35.7% done] [ 11904/  3552 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [39.3% done] [  6756/  7744 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [42.9% done] [  3528/ 11344 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [46.4% done] [  8988/  4116 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.3% done] [ 11124/     0 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [51.7% done] [  4128/  7592 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.3% done] [  6308/  4324 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [56.7% done] [  8312/  2236 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  3044/  6372 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26022, got signal=6
Threads: 2: [m_m] [61.3% done] [  4068/  5416 kb/s] [eta 00m:12s]
Threads: 2: [m_m] [64.5% done] [  2808/  5576 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26021, got signal=6
Threads: 1: [__m] [65.6% done] [  3504/  5172 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26023, got signal=6

fio: (groupid=0): err= 0: pid=26021
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.9%, 2=3.2%, 4=30.0%, 8=65.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.7%, 4=0.4%, 10=2.0%, 20=2.9%, 50=15.6%, 100=28.9%
     lat (msec): 250=45.2%, 500=2.4%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26022
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.8%, 4=34.9%, 8=61.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.1%, 10=1.8%, 20=2.9%, 50=16.6%, 100=38.6%
     lat (msec): 250=39.0%, 500=0.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26023
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.8%, 4=37.9%, 8=57.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=2.5%, 20=4.2%, 50=20.2%, 100=23.4%
     lat (msec): 250=45.4%, 500=3.6%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2944/2285, merge=445/269, ticks=42228/91936, in_queue=134164, util=98.96%
0.29user 0.35system 0:22.10elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2485minor)pagefaults 0swaps