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] [  4643/  9412 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [11.4% done] [ 11433/   905 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [14.7% done] [  8896/  3997 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [17.1% done] [  8499/  4210 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [20.0% done] [  6963/  4446 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [22.2% done] [  4233/  7404 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [25.7% done] [  9133/  3422 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [27.8% done] [  2587/  8688 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [29.7% done] [  6510/  3375 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [32.4% done] [  3300/  7171 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [34.2% done] [  4895/  5576 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [36.8% done] [  4997/  3993 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [38.5% done] [  5781/  3938 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.0% done] [  4170/  4718 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [42.5% done] [  6699/  1981 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.0% done] [  3816/  4773 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [46.3% done] [  3607/  4659 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [48.8% done] [  5561/  2682 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [50.0% done] [  5155/  2331 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [51.1% done] [  4470/  2902 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [53.3% done] [  2886/  4060 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [54.3% done] [  2772/  3910 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [56.5% done] [  5777/   760 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [57.4% done] [  5608/  1059 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [58.3% done] [  3725/  2008 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [60.4% done] [  6301/  2272 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [60.0% done] [  5880/     0 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4481, got signal=6
Threads: 2: [m_m] [60.8% done] [  5175/  2024 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4480, got signal=6
Threads: 1: [__m] [62.7% done] [  4395/  2776 kb/s] [eta 00m:19s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4482, got signal=6

fio: (groupid=0): err= 0: pid=4480
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.8%, 4=18.3%, 8=80.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.3%, 20=2.5%, 50=18.6%, 100=7.4%
     lat (msec): 250=59.8%, 500=9.6%, 750=1.1%, 1000=0.2%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4481
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=1.0%, 4=16.8%, 8=81.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.0%, 10=0.8%, 20=2.6%, 50=17.4%, 100=4.7%
     lat (msec): 250=66.4%, 500=7.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4482
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=1.9%, 4=17.2%, 8=80.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.0%, 10=1.4%, 20=5.3%, 50=14.8%, 100=2.8%
     lat (msec): 250=63.9%, 500=9.2%, 750=1.1%, 1000=0.5%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3286/2194, merge=418/509, ticks=70588/40180, in_queue=110760, util=98.83%
0.10user 0.29system 0:33.64elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2510minor)pagefaults 0swaps