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] [9.1% done] [ 10024/  5132 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [11.4% done] [ 10304/  6404 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [13.9% done] [ 11700/  3528 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [15.4% done] [ 11624/  1804 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [17.5% done] [  8740/  4792 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [20.0% done] [ 10312/  4700 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [23.1% done] [  8940/  4932 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [24.4% done] [  5004/  8396 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [27.5% done] [  5232/  7256 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [30.0% done] [  7748/  4036 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [32.5% done] [  8012/  4416 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [35.0% done] [  5244/  6052 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [37.5% done] [  2488/  9784 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [42.1% done] [   848/ 10876 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [43.6% done] [  5148/  5376 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [45.0% done] [  3540/  5244 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [47.5% done] [  5160/  3228 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [48.8% done] [  7040/  1660 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [50.0% done] [  1604/  7680 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13617, got signal=6
Threads: 2: [m_m] [50.0% done] [  4752/  1308 kb/s] [eta 00m:22s]
Threads: 2: [m_m] [53.5% done] [  1484/  6604 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13618, got signal=6
Threads: 1: [m__] [58.5% done] [  8820/   496 kb/s] [eta 00m:17s]
Threads: 1: [m__] [64.1% done] [  4044/  4020 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13616, got signal=6

fio: (groupid=0): err= 0: pid=13616
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=1.0%, 2=3.6%, 4=41.2%, 8=54.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.3%, 4=0.2%, 10=1.9%, 20=5.0%, 50=38.6%, 100=11.2%
     lat (msec): 250=26.3%, 500=12.4%, 750=2.4%, 1000=0.4%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13617
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=3.1%, 4=37.1%, 8=59.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.1%, 10=1.4%, 20=2.4%, 50=20.1%, 100=21.4%
     lat (msec): 250=50.5%, 500=2.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13618
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=2.9%, 4=34.5%, 8=61.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.0%, 10=1.2%, 20=2.6%, 50=14.2%, 100=24.8%
     lat (msec): 250=53.4%, 500=2.4%, 750=0.5%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3000/2707, merge=476/202, ticks=49452/82876, in_queue=132328, util=98.93%
0.25user 0.35system 0:26.72elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2493minor)pagefaults 0swaps