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] [ 12476/  8212 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [16.7% done] [ 16340/  3672 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [21.7% done] [ 13224/  6916 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [25.0% done] [ 14096/  2428 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [ 10096/  6524 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [  9012/  8236 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [34.6% done] [  6972/  9484 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [40.0% done] [  5772/ 10532 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  3976/ 10620 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [  8328/  6576 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [  8372/  3752 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  7844/  2244 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.7% done] [  7020/  4412 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [55.2% done] [  6504/  3540 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  2500/  8416 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  2416/  6872 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22724, got signal=6
Threads: 2: [m_m] [61.3% done] [  4480/  4784 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22725, got signal=6
Threads: 1: [m__] [62.5% done] [  6036/  2752 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 1: [m__] [67.7% done] [  7200/     0 kb/s] [eta 00m:10s]
fio: pid=22723, got signal=6

fio: (groupid=0): err= 0: pid=22723
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.0%, 4=29.7%, 8=68.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.0%, 10=0.7%, 20=4.7%, 50=23.2%, 100=22.1%
     lat (msec): 250=43.9%, 500=4.2%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22724
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=3.3%, 4=37.0%, 8=59.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.2%, 4=0.5%, 10=2.2%, 20=5.1%, 50=18.9%, 100=31.8%
     lat (msec): 250=39.8%, 500=0.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22725
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.6%, 4=33.0%, 8=62.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.3%, 4=0.1%, 10=1.0%, 20=2.3%, 50=19.1%, 100=28.4%
     lat (msec): 250=44.6%, 500=2.5%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2865/2250, merge=551/124, ticks=39464/29308, in_queue=68768, util=98.41%
0.28user 0.41system 0:21.97elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2487minor)pagefaults 0swaps