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] [9.4% done] [ 13464/  3568 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [12.5% done] [ 11832/  4796 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [15.6% done] [ 10891/  5213 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [18.2% done] [  7131/  4445 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [20.0% done] [  5566/ 10114 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [22.2% done] [  7923/  3551 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [26.5% done] [ 10105/  3864 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [28.6% done] [  9069/  5067 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [29.7% done] [  2393/ 10723 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [31.6% done] [  5254/  6956 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [33.3% done] [ 10743/   426 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.9% done] [  5485/  6168 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [37.5% done] [  3947/  7106 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [40.0% done] [  7564/  3224 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.5% done] [  7332/  2652 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [43.9% done] [  5148/  4604 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [46.3% done] [   712/  9732 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [47.6% done] [  3372/  4424 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [48.8% done] [  5192/  3220 kb/s] [eta 00m:22s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 3: [mmm] [51.2% done] [  2304/  6540 kb/s] [eta 00m:21s]
fio: pid=31647, got signal=6
Threads: 2: [mm_] [54.8% done] [  1660/  6992 kb/s] [eta 00m:19s]
Threads: 2: [mm_] [55.8% done] [   772/  7404 kb/s] [eta 00m:19s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31646, got signal=6
Threads: 1: [m__] [62.5% done] [  4988/  4084 kb/s] [eta 00m:15s]
Threads: 1: [m__] [66.7% done] [  6144/  1420 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31645, got signal=6

fio: (groupid=0): err= 0: pid=31645
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=2.7%, 4=36.9%, 8=59.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=2.1%, 20=4.3%, 50=34.7%, 100=11.0%
     lat (msec): 250=32.3%, 500=13.5%, 750=1.6%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31646
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.7%, 4=34.8%, 8=61.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.0%, 4=0.0%, 10=1.3%, 20=4.6%, 50=16.2%, 100=20.2%
     lat (msec): 250=51.9%, 500=4.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31647
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=2.5%, 4=37.3%, 8=60.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.1%, 10=1.6%, 20=4.5%, 50=16.6%, 100=24.9%
     lat (msec): 250=49.0%, 500=2.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2925/2818, merge=407/202, ticks=53468/89740, in_queue=143204, util=98.74%
0.23user 0.42system 0:27.03elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2507minor)pagefaults 0swaps