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] [13.6% done] [ 14568/  7860 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 13852/  6124 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [ 14292/  5380 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 12000/  6248 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [  6272/ 12200 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [  9908/  8444 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [  7460/  7700 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [ 12472/  2268 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  9232/  5232 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [  4732/ 10384 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [  7240/  6528 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  5908/  5964 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  6376/  4968 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  3928/  6552 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  6112/  2484 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [60.0% done] [  5824/  3068 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29070, got signal=6
Threads: 2: [mm_] [61.3% done] [  4760/  3432 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 2: [mm_] [62.5% done] [  5284/  3988 kb/s] [eta 00m:12s]
fio: pid=29069, got signal=6
Threads: 1: [m__] [67.7% done] [  7696/     0 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29068, got signal=6

fio: (groupid=0): err= 0: pid=29068
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.6%, 4=31.1%, 8=67.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.0%, 10=0.7%, 20=3.2%, 50=21.0%, 100=24.0%
     lat (msec): 250=47.1%, 500=2.4%, 750=0.7%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29069
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.9%, 2=4.0%, 4=36.5%, 8=58.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.0%, 10=3.3%, 20=4.0%, 50=18.1%, 100=29.6%
     lat (msec): 250=42.1%, 500=1.7%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29070
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=3.3%, 4=34.7%, 8=61.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.0%, 4=0.1%, 10=1.9%, 20=2.9%, 50=19.0%, 100=25.4%
     lat (msec): 250=49.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3137/2060, merge=784/263, ticks=42120/35072, in_queue=77180, util=98.88%
0.25user 0.42system 0:22.07elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2481minor)pagefaults 0swaps