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] [9.4% done] [  8578/  7663 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [12.5% done] [ 11812/  3896 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [15.2% done] [  9183/  5940 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [17.1% done] [  8935/  4514 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [20.0% done] [  7330/  6302 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [23.5% done] [  9719/  5729 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [25.0% done] [  8813/  3393 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [27.0% done] [  6550/  7163 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [30.6% done] [  4291/  9264 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [34.3% done] [  6400/  6855 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [36.1% done] [  8582/  3486 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [36.8% done] [  6607/  3616 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [40.5% done] [  4811/  6465 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [44.4% done] [  2462/  9894 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [45.9% done] [  2462/  8350 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [48.6% done] [  8265/   325 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [51.4% done] [  3328/  6741 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [52.6% done] [  4888/  3596 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [55.3% done] [  4185/  4051 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [57.9% done] [  3384/  4579 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [59.0% done] [  4738/  2970 kb/s] [eta 00m:16s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=10048, got signal=6
Threads: 2: [m_m] [60.0% done] [  3596/  3848 kb/s] [eta 00m:16s]
Threads: 2: [m_m] [64.1% done] [  1401/  6757 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=10049, got signal=6
Threads: 1: [m__] [65.0% done] [  2027/  5067 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=10047, got signal=6

fio: (groupid=0): err= 0: pid=10047
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.8%, 4=40.3%, 8=55.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.4%, 4=0.3%, 10=1.3%, 20=7.4%, 50=22.8%, 100=19.0%
     lat (msec): 250=33.0%, 500=13.0%, 750=1.2%, 1000=0.3%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=10048
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.0%, 4=26.4%, 8=71.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.1%, 10=0.2%, 20=4.0%, 50=14.9%, 100=30.0%
     lat (msec): 250=46.6%, 500=3.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=10049
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=1.8%, 4=24.6%, 8=73.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.0%, 10=1.7%, 20=2.5%, 50=12.9%, 100=21.5%
     lat (msec): 250=56.7%, 500=3.9%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2910/2850, merge=458/265, ticks=54004/56200, in_queue=110204, util=99.23%
0.26user 0.40system 0:27.04elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2498minor)pagefaults 0swaps