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] [  5608/  7030 kb/s] [eta 00m:34s]
Threads: 3: [mmm] [11.8% done] [  9708/  3930 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [14.7% done] [  9011/  5017 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [17.1% done] [  7195/  6376 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [20.0% done] [  7175/  4253 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [22.2% done] [  9779/   488 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [25.0% done] [  8349/  3107 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [27.0% done] [  6254/  3745 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [29.7% done] [ 10381/   275 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [31.6% done] [  3544/  5876 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [34.2% done] [  5435/  5844 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [36.8% done] [  2693/  7065 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [38.5% done] [  2819/  8849 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [40.0% done] [  5301/  4296 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [42.5% done] [  5391/  3438 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.0% done] [  1236/  9231 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [46.3% done] [  3564/  4812 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [48.8% done] [  1602/  7392 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [50.0% done] [  7861/   137 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [52.4% done] [  5194/  2760 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [53.5% done] [  5080/  1287 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [54.3% done] [  1685/  6356 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [55.3% done] [  3942/  4036 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [55.1% done] [  4962/  2410 kb/s] [eta 00m:22s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4421, got signal=6
Threads: 2: [_mm] [57.1% done] [  2004/  4552 kb/s] [eta 00m:21s]
Threads: 2: [_mm] [58.0% done] [  4391/  2237 kb/s] [eta 00m:21s]
Threads: 2: [_mm] [61.2% done] [  3867/  4076 kb/s] [eta 00m:19s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 2: [_mm] [64.6% done] [  2788/  5269 kb/s] [eta 00m:17s]
fio: pid=4423, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4422, got signal=6

fio: (groupid=0): err= 0: pid=4421
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=2.6%, 4=22.9%, 8=73.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.4%, 4=0.0%, 10=0.1%, 20=5.3%, 50=16.5%, 100=10.2%
     lat (msec): 250=60.6%, 500=5.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4422
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=2.5%, 4=18.4%, 8=78.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.0%, 10=0.4%, 20=5.3%, 50=15.2%, 100=8.8%
     lat (msec): 250=55.9%, 500=13.0%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4423
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=1.7%, 4=17.5%, 8=80.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.0%, 10=0.1%, 20=4.4%, 50=10.1%, 100=13.4%
     lat (msec): 250=59.2%, 500=11.0%, 750=0.6%, 1000=0.2%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2766/2593, merge=459/483, ticks=67064/41052, in_queue=108116, util=98.92%
0.12user 0.37system 0:32.36elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2512minor)pagefaults 0swaps