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] [7.5% done] [ 11137/  6447 kb/s] [eta 00m:37s]
Threads: 3: [mmm] [11.4% done] [ 11862/  3647 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [13.9% done] [  7672/  7364 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [16.2% done] [  6730/  8349 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [18.9% done] [ 10117/  2926 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [20.5% done] [  6884/  5525 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [23.1% done] [  8546/  3930 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [25.6% done] [ 13646/     0 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [28.9% done] [  6679/  5943 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [30.8% done] [  6900/  4856 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [33.3% done] [  6207/  7045 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [34.1% done] [  6388/  5927 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [36.6% done] [  6400/  3780 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [39.0% done] [  4927/  6171 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [40.5% done] [  3186/  6203 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [42.9% done] [  6321/  2012 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [44.2% done] [  8132/   578 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [45.7% done] [  2599/  6144 kb/s] [eta 00m:25s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17092, got signal=6
Threads: 2: [mm_] [47.8% done] [  3883/  3981 kb/s] [eta 00m:24s]
Threads: 2: [mm_] [52.3% done] [  2244/  5828 kb/s] [eta 00m:21s]
Threads: 2: [mm_] [55.8% done] [  4765/  3410 kb/s] [eta 00m:19s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17091, got signal=6
Threads: 1: [m__] [58.1% done] [  4651/  3426 kb/s] [eta 00m:18s]
Threads: 1: [m__] [65.0% done] [  4186/  4521 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17090, got signal=6

fio: (groupid=0): err= 0: pid=17090
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=4.2%, 4=44.3%, 8=50.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.4%, 4=0.1%, 10=0.0%, 20=5.8%, 50=32.5%, 100=13.2%
     lat (msec): 250=30.1%, 500=15.1%, 750=1.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17091
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=3.3%, 4=36.4%, 8=59.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.1%, 4=0.0%, 10=0.0%, 20=3.9%, 50=14.0%, 100=27.8%
     lat (msec): 250=45.8%, 500=6.7%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17092
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=1.0%, 2=4.5%, 4=42.1%, 8=52.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=0.1%, 10=0.1%, 20=3.4%, 50=19.1%, 100=28.2%
     lat (msec): 250=46.6%, 500=1.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3226/2463, merge=462/299, ticks=54588/48016, in_queue=102604, util=98.83%
0.24user 0.44system 0:27.22elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2494minor)pagefaults 0swaps