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] [10.7% done] [  4388/ 12396 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [13.3% done] [ 11780/  5216 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [15.2% done] [ 10568/  6056 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [19.4% done] [  9736/  5120 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [21.2% done] [  9568/  5060 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [22.9% done] [ 10746/  1213 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [24.3% done] [  9240/  4256 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [27.0% done] [  3096/  9428 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [28.9% done] [  6168/  7424 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [30.8% done] [  4180/  9112 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [32.5% done] [  3784/  7764 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [35.9% done] [  5400/  6780 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [38.5% done] [  5908/  5732 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.0% done] [  2402/  9066 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [42.5% done] [  2669/  6570 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.0% done] [  4985/  4132 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [46.3% done] [  2633/  7476 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [47.6% done] [  5550/  2434 kb/s] [eta 00m:22s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19793, got signal=6
Threads: 2: [mm_] [47.7% done] [  2742/  5705 kb/s] [eta 00m:23s]
Threads: 2: [mm_] [50.0% done] [  4656/  3376 kb/s] [eta 00m:22s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19792, got signal=6
Threads: 1: [m__] [54.8% done] [  1779/  7700 kb/s] [eta 00m:19s]
Threads: 1: [m__] [61.5% done] [  4185/  5046 kb/s] [eta 00m:15s]
Threads: 1: [m__] [65.8% done] [  3746/  4941 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19791, got signal=6

fio: (groupid=0): err= 0: pid=19791
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.8%, 4=39.5%, 8=56.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.5%, 4=0.6%, 10=2.3%, 20=7.9%, 50=31.0%, 100=17.9%
     lat (msec): 250=21.2%, 500=14.0%, 750=2.7%, 1000=0.6%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19792
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=2.9%, 4=30.1%, 8=66.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.7%, 10=1.4%, 20=3.7%, 50=15.5%, 100=23.0%
     lat (msec): 250=50.8%, 500=3.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19793
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.3%, 4=38.5%, 8=57.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.7%, 10=1.1%, 20=4.3%, 50=18.3%, 100=29.2%
     lat (msec): 250=42.5%, 500=2.5%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2484/3136, merge=545/359, ticks=46024/74764, in_queue=120788, util=99.04%
0.25user 0.33system 0:26.06elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2500minor)pagefaults 0swaps