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] [8.3% done] [  5974/  7250 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [10.8% done] [ 12244/   535 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [13.5% done] [  6904/  6293 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [16.7% done] [  5442/  7951 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [18.9% done] [  5864/  5084 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [21.6% done] [  8278/  3252 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [23.7% done] [  8751/  2402 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [26.3% done] [  3843/  7589 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [28.9% done] [  5789/  2823 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [30.8% done] [  7790/  2449 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [33.3% done] [  5179/  5431 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.0% done] [  4222/  5348 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [37.5% done] [  6289/  4166 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [40.0% done] [  3142/  6754 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.5% done] [  5277/  3237 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [43.9% done] [  5025/  3954 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.2% done] [  4529/  3851 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.7% done] [  3993/  3776 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [48.9% done] [  2256/  5651 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [51.1% done] [  5167/  2516 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [53.3% done] [  3875/  3292 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [54.3% done] [  4166/  2760 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [55.3% done] [  5395/  1469 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [56.2% done] [  5502/  1201 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [57.1% done] [  5517/  1717 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [58.0% done] [  3918/  3355 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=16022, got signal=6
Threads: 2: [_mm] [58.8% done] [  2768/  3863 kb/s] [eta 00m:21s]
Threads: 2: [_mm] [59.6% done] [  5001/  1000 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=16024, got signal=6
Threads: 1: [_m_] [62.7% done] [  7290/     0 kb/s] [eta 00m:19s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=16023, got signal=6

fio: (groupid=0): err= 0: pid=16022
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=1.8%, 4=21.2%, 8=76.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.0%, 10=0.0%, 20=4.1%, 50=18.7%, 100=9.8%
     lat (msec): 250=59.0%, 500=7.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=16023
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=1.7%, 4=17.0%, 8=80.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.1%, 10=0.3%, 20=5.1%, 50=17.7%, 100=3.5%
     lat (msec): 250=60.1%, 500=11.9%, 750=0.2%, 1000=0.2%, >=2000=0.3%
fio: (groupid=0): err= 0: pid=16024
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=1.0%, 4=15.2%, 8=83.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.2%, 20=3.0%, 50=11.6%, 100=9.0%
     lat (msec): 250=67.4%, 500=8.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3311/2180, merge=443/465, ticks=77632/38220, in_queue=115852, util=98.89%
0.12user 0.24system 0:33.63elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2516minor)pagefaults 0swaps