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] [6.0% done] [ 10624/  7380 kb/s] [eta 00m:47s]
Threads: 3: [mmm] [8.9% done] [  5253/ 11122 kb/s] [eta 00m:41s]
Threads: 3: [mmm] [10.9% done] [ 10300/  4664 kb/s] [eta 00m:41s]
Threads: 3: [mmm] [12.8% done] [  8264/  5768 kb/s] [eta 00m:41s]
Threads: 3: [mmm] [14.6% done] [ 11488/  2060 kb/s] [eta 00m:41s]
Threads: 3: [mmm] [18.2% done] [  6312/  7668 kb/s] [eta 00m:36s]
Threads: 3: [mmm] [20.0% done] [  7092/  4616 kb/s] [eta 00m:36s]
Threads: 3: [mmm] [22.2% done] [  6580/  7440 kb/s] [eta 00m:35s]
Threads: 3: [mmm] [24.4% done] [  2116/ 10416 kb/s] [eta 00m:34s]
Threads: 3: [mmm] [26.7% done] [  6004/  5764 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [29.5% done] [  5840/  6104 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [31.8% done] [  5092/  4452 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [34.9% done] [  5712/  6128 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [38.1% done] [  7364/  4656 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [38.6% done] [  4076/  5316 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [40.9% done] [  5840/  3984 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [42.2% done] [  2444/  7144 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [42.6% done] [  1576/  6780 kb/s] [eta 00m:27s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25064, got signal=6
Threads: 2: [m_m] [43.8% done] [  2604/  6116 kb/s] [eta 00m:27s]
Threads: 2: [m_m] [46.8% done] [  7688/     0 kb/s] [eta 00m:25s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25065, got signal=6
Threads: 1: [m__] [51.1% done] [  5820/  2628 kb/s] [eta 00m:22s]
Threads: 1: [m__] [55.8% done] [  7784/     0 kb/s] [eta 00m:19s]
Threads: 1: [m__] [62.5% done] [   300/  9864 kb/s] [eta 00m:15s]
Threads: 1: [m__] [66.7% done] [  6644/   280 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25063, got signal=6

fio: (groupid=0): err= 0: pid=25063
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=4.0%, 4=43.8%, 8=51.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.2%, 4=0.1%, 10=1.7%, 20=7.5%, 50=39.1%, 100=12.1%
     lat (msec): 250=23.5%, 500=11.9%, 750=1.6%, 1000=0.1%, >=2000=0.8%
fio: (groupid=0): err= 0: pid=25064
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=3.3%, 4=37.4%, 8=58.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.1%, 10=1.9%, 20=4.4%, 50=18.9%, 100=28.0%
     lat (msec): 250=43.1%, 500=2.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25065
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=2.2%, 4=28.4%, 8=68.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.2%, 10=1.1%, 20=2.7%, 50=17.8%, 100=25.9%
     lat (msec): 250=47.0%, 500=4.3%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2986/2749, merge=443/362, ticks=50628/59048, in_queue=109668, util=98.60%
0.26user 0.48system 0:27.15elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2509minor)pagefaults 0swaps