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] [  9048/  3816 kb/s] [eta 00m:34s]
Threads: 3: [mmm] [11.4% done] [ 10184/  2448 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [14.7% done] [  9704/  5212 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [17.1% done] [  7784/  5132 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [20.0% done] [  8780/  2200 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [22.2% done] [  8332/  2652 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [25.0% done] [  8088/  3440 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [27.0% done] [  7596/  2720 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [29.7% done] [  7995/  3038 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [31.6% done] [  5224/  3324 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [33.3% done] [  6248/  3832 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.9% done] [  7316/  2368 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [37.5% done] [  5348/  4192 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [40.0% done] [  7676/  1728 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.5% done] [  3576/  5108 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [43.9% done] [  4552/  4484 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.2% done] [  4452/  4304 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.6% done] [  2920/  5256 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [48.8% done] [  4592/  2476 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [50.0% done] [  4868/  2696 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [52.3% done] [  1900/  6260 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [53.3% done] [  2976/  3532 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [54.3% done] [  3068/  4204 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [55.3% done] [  2164/  3460 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [56.2% done] [  6792/   568 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [57.1% done] [  1004/  6556 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15100, got signal=6
Threads: 2: [_mm] [59.2% done] [  2876/  2768 kb/s] [eta 00m:20s]
Threads: 2: [_mm] [60.0% done] [  2848/  4272 kb/s] [eta 00m:20s]
Threads: 2: [_mm] [60.8% done] [  3592/  4164 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15101, got signal=6
Threads: 1: [__m] [65.3% done] [  3476/  4356 kb/s] [eta 00m:17s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15102, got signal=6

fio: (groupid=0): err= 0: pid=15100
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=1.7%, 4=18.1%, 8=79.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.0%, 10=2.1%, 20=2.7%, 50=15.8%, 100=8.6%
     lat (msec): 250=64.8%, 500=5.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15101
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=1.9%, 4=17.1%, 8=80.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.0%, 10=2.4%, 20=3.3%, 50=16.4%, 100=6.8%
     lat (msec): 250=60.7%, 500=8.9%, 750=0.5%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15102
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=1.8%, 4=16.4%, 8=81.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.0%, 10=2.4%, 20=3.0%, 50=15.6%, 100=6.6%
     lat (msec): 250=61.0%, 500=9.6%, 750=0.5%, 1000=0.3%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2898/2599, merge=588/450, ticks=70732/41104, in_queue=111836, util=98.97%
0.09user 0.38system 0:33.62elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2526minor)pagefaults 0swaps