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] [13.6% done] [ 20380/     0 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [16.7% done] [  5732/ 15692 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [  9412/  8600 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [24.0% done] [ 15184/  2416 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [28.0% done] [ 13788/  4596 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [30.8% done] [  4236/ 13108 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [33.3% done] [  6268/ 10924 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [38.5% done] [  7952/  6756 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.7% done] [ 12012/  1696 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [44.4% done] [ 11716/  1740 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [  7812/  5740 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  2484/ 10796 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  2700/  8368 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  4388/  6400 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.6% done] [  5148/  3976 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  4360/  4280 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 3: [mmm] [61.3% done] [  2552/  6152 kb/s] [eta 00m:12s]
fio: pid=25356, got signal=6
Threads: 2: [mm_] [64.5% done] [  7648/     0 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25355, got signal=6
Threads: 1: [m__] [67.7% done] [  5060/  2696 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25354, got signal=6

fio: (groupid=0): err= 0: pid=25354
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=4.4%, 4=34.9%, 8=60.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.8%, 4=0.4%, 10=2.2%, 20=2.8%, 50=17.8%, 100=25.2%
     lat (msec): 250=45.1%, 500=3.9%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25355
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.1%, 4=30.8%, 8=65.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.2%, 10=1.0%, 20=2.7%, 50=19.9%, 100=29.4%
     lat (msec): 250=43.8%, 500=1.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25356
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.9%, 2=3.2%, 4=35.5%, 8=60.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=2.0%, 4=0.2%, 10=2.5%, 20=3.1%, 50=15.1%, 100=31.8%
     lat (msec): 250=43.0%, 500=1.3%, 750=0.3%, 1000=0.3%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2778/2387, merge=587/283, ticks=38520/33504, in_queue=72016, util=98.96%
0.28user 0.38system 0:21.99elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2487minor)pagefaults 0swaps