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] [5.6% done] [ 11956/  4996 kb/s] [eta 00m:51s]
Threads: 3: [mmm] [8.0% done] [ 11472/  6340 kb/s] [eta 00m:46s]
Threads: 3: [mmm] [11.9% done] [  9052/  6776 kb/s] [eta 00m:37s]
Threads: 3: [mmm] [14.6% done] [  6244/  6828 kb/s] [eta 00m:35s]
Threads: 3: [mmm] [17.9% done] [  9160/  4544 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [21.1% done] [  5688/  7800 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [22.5% done] [  6596/  6836 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [25.6% done] [  9704/  4180 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [27.5% done] [  9604/  1944 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [30.0% done] [  7400/  4600 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [31.7% done] [  8392/  3756 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [33.3% done] [  8744/  2832 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [36.6% done] [  4708/  7476 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [38.1% done] [  4508/  5948 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [39.5% done] [  3260/  6348 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [41.9% done] [  4624/  4552 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [43.2% done] [  5224/  2640 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [44.4% done] [  4876/  4272 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [46.7% done] [  3828/  4864 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [48.9% done] [  4600/  2540 kb/s] [eta 00m:23s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19523, got signal=6
Threads: 2: [m_m] [50.0% done] [  5720/   292 kb/s] [eta 00m:23s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19524, got signal=6
Threads: 1: [m__] [54.5% done] [  7216/     0 kb/s] [eta 00m:20s]
Threads: 1: [m__] [61.0% done] [    88/ 10720 kb/s] [eta 00m:16s]
Threads: 1: [m__] [66.7% done] [  3488/  4960 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19522, got signal=6

fio: (groupid=0): err= 0: pid=19522
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=1.0%, 2=5.0%, 4=37.4%, 8=56.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.7%, 4=0.0%, 10=2.5%, 20=7.4%, 50=33.5%, 100=9.9%
     lat (msec): 250=29.6%, 500=13.0%, 750=1.3%, 1000=0.0%, >=2000=0.5%
fio: (groupid=0): err= 0: pid=19523
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=1.9%, 4=29.7%, 8=68.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.9%, 20=1.7%, 50=13.6%, 100=24.3%
     lat (msec): 250=55.8%, 500=2.9%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19524
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=2.7%, 4=34.7%, 8=62.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.0%, 10=0.4%, 20=2.3%, 50=14.0%, 100=28.6%
     lat (msec): 250=49.2%, 500=4.4%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3186/2525, merge=413/295, ticks=54788/43480, in_queue=98268, util=98.97%
0.25user 0.36system 0:27.15elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2494minor)pagefaults 0swaps