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] [8.1% done] [  8812/  5024 kb/s] [eta 00m:34s]
Threads: 3: [mmm] [10.5% done] [ 11388/  1524 kb/s] [eta 00m:34s]
Threads: 3: [mmm] [13.5% done] [  3816/ 11568 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [16.7% done] [  8816/  4304 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [19.4% done] [  8408/  4128 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [21.6% done] [  7300/  4640 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [25.0% done] [  2892/ 10008 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [27.8% done] [  7444/  2956 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [29.7% done] [  5840/  4256 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [31.6% done] [  5156/  2636 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [33.3% done] [  7024/  2092 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.9% done] [  4072/  6748 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [37.5% done] [  4624/  4768 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [40.0% done] [  6936/  3364 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.5% done] [  4304/  5160 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [43.9% done] [  6732/  2640 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.2% done] [  1896/  7512 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.6% done] [   964/  7892 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [48.8% done] [  4092/  3468 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [50.0% done] [  1346/  7397 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [52.3% done] [  3185/  3486 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [53.3% done] [  3197/  4648 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [54.3% done] [  5745/  2214 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [54.2% done] [  2149/  5883 kb/s] [eta 00m:22s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=16064, got signal=6
Threads: 2: [_mm] [56.2% done] [  2222/  4909 kb/s] [eta 00m:21s]
Threads: 2: [_mm] [57.1% done] [  4587/  2324 kb/s] [eta 00m:21s]
Threads: 2: [_mm] [59.2% done] [  3368/  3852 kb/s] [eta 00m:20s]
Threads: 2: [_mm] [63.8% done] [  4152/  4587 kb/s] [eta 00m:17s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 2: [_mm] [66.0% done] [  5002/  1288 kb/s] [eta 00m:16s]
fio: pid=16065, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=16066, got signal=6

fio: (groupid=0): err= 0: pid=16064
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.1%, 4=20.2%, 8=78.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.1%, 10=2.2%, 20=6.3%, 50=13.2%, 100=11.3%
     lat (msec): 250=61.9%, 500=4.1%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=16065
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=0.8%, 4=15.2%, 8=83.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.1%, 10=0.8%, 20=3.5%, 50=18.8%, 100=8.4%
     lat (msec): 250=56.8%, 500=10.1%, 750=0.5%, 1000=0.2%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=16066
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=0.7%, 4=13.6%, 8=85.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.8%, 20=1.6%, 50=14.3%, 100=13.9%
     lat (msec): 250=58.7%, 500=8.9%, 750=1.2%, 1000=0.5%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2864/2572, merge=629/505, ticks=72320/40460, in_queue=112780, util=98.94%
0.15user 0.36system 0:32.62elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2517minor)pagefaults 0swaps