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] [7.7% done] [  6528/ 10556 kb/s] [eta 00m:36s]
Threads: 3: [mmm] [11.1% done] [  6316/ 11396 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [13.9% done] [  7316/  8540 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [16.7% done] [  7284/  5568 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [18.9% done] [  7696/  4548 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [21.6% done] [  8016/  3684 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [22.5% done] [  8188/  5720 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [25.6% done] [  9156/  3732 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [28.9% done] [ 10552/  3304 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [31.6% done] [  8668/  2128 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [32.5% done] [ 11172/   176 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [35.9% done] [  6224/  6496 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [38.5% done] [  5380/  7340 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.0% done] [  6764/  3776 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [42.5% done] [  8532/   788 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.0% done] [  6792/  2932 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [46.3% done] [  4960/  3740 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [48.8% done] [  4808/  4228 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [51.2% done] [  1568/  7664 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28052, got signal=6
Threads: 2: [m_m] [51.2% done] [  1504/  7116 kb/s] [eta 00m:21s]
Threads: 2: [m_m] [57.5% done] [  2420/  7340 kb/s] [eta 00m:17s]
Threads: 2: [m_m] [58.5% done] [   884/  6776 kb/s] [eta 00m:17s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28053, got signal=6
Threads: 1: [m__] [64.1% done] [  3072/  6056 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28051, got signal=6

fio: (groupid=0): err= 0: pid=28051
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.9%, 2=4.3%, 4=39.0%, 8=55.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.1%, 10=1.8%, 20=6.1%, 50=31.2%, 100=13.8%
     lat (msec): 250=33.5%, 500=9.2%, 750=2.9%, 1000=0.4%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28052
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.8%, 4=32.0%, 8=64.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=0.1%, 10=2.2%, 20=3.6%, 50=15.2%, 100=23.8%
     lat (msec): 250=50.4%, 500=3.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28053
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=2.3%, 4=31.6%, 8=65.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.4%, 10=1.5%, 20=4.0%, 50=13.7%, 100=21.6%
     lat (msec): 250=52.0%, 500=5.8%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2990/2674, merge=591/344, ticks=53832/46976, in_queue=100804, util=99.09%
0.27user 0.40system 0:26.71elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2506minor)pagefaults 0swaps