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] [11.1% done] [  8235/  8440 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [14.8% done] [  5861/ 10718 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [17.9% done] [ 12096/  3637 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [20.0% done] [  6028/ 10144 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [22.6% done] [  8712/  3676 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [25.0% done] [  1192/ 14312 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [27.3% done] [  8660/  2980 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [29.4% done] [  8356/  3104 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [32.4% done] [  8468/  4700 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [35.3% done] [  7920/  3948 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [37.1% done] [  1516/ 11204 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [40.0% done] [  3968/  7136 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [40.5% done] [  4792/  5824 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [43.2% done] [  6248/  4096 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [44.7% done] [  7448/  2208 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [47.4% done] [  3880/  6516 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [47.5% done] [  5080/  2692 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [48.8% done] [  5584/  2676 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [51.2% done] [  1652/  6400 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 3: [mmm] [51.2% done] [   168/  8716 kb/s] [eta 00m:21s]
fio: pid=13420, got signal=6
Threads: 2: [m_m] [54.8% done] [  1696/  6040 kb/s] [eta 00m:19s]
Threads: 2: [m_m] [57.1% done] [  1924/  5736 kb/s] [eta 00m:18s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13421, got signal=6
Threads: 1: [m__] [62.5% done] [  4268/  5140 kb/s] [eta 00m:15s]
Threads: 1: [m__] [66.7% done] [  6520/     0 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13419, got signal=6

fio: (groupid=0): err= 0: pid=13419
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=3.5%, 4=43.6%, 8=52.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=0.2%, 10=0.8%, 20=5.3%, 50=33.3%, 100=14.4%
     lat (msec): 250=30.1%, 500=12.5%, 750=1.0%, 1000=0.6%, >=2000=0.4%
fio: (groupid=0): err= 0: pid=13420
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.6%, 4=33.5%, 8=62.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.1%, 4=0.1%, 10=1.2%, 20=3.5%, 50=13.9%, 100=29.8%
     lat (msec): 250=45.3%, 500=4.5%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13421
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=4.6%, 4=37.8%, 8=56.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.5%, 4=0.1%, 10=1.5%, 20=4.6%, 50=17.8%, 100=23.5%
     lat (msec): 250=43.1%, 500=7.5%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2783/2931, merge=435/308, ticks=51704/65880, in_queue=117584, util=98.91%
0.26user 0.49system 0:27.24elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2498minor)pagefaults 0swaps