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] [8.3% done] [ 16964/   492 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [11.8% done] [ 11972/  4640 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [16.7% done] [ 11092/  5744 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [20.7% done] [  5940/  8136 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [23.3% done] [  7196/  6648 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [26.7% done] [  7388/  5492 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [30.0% done] [  6364/  7036 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [31.2% done] [  7912/  6088 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [35.5% done] [  3604/  9308 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [38.7% done] [  7528/  5672 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [39.4% done] [  7100/  3844 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [41.2% done] [  6800/  3880 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [44.1% done] [  8772/  2020 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [45.7% done] [  7504/  2268 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [47.2% done] [  4424/  4728 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [48.6% done] [  3912/  6352 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [50.0% done] [  4152/  5256 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [52.6% done] [  2652/  6292 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [53.8% done] [  5124/  1420 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [55.0% done] [  1212/  7120 kb/s] [eta 00m:18s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=32420, got signal=6
Threads: 2: [m_m] [59.0% done] [  2440/  5620 kb/s] [eta 00m:16s]
Threads: 2: [m_m] [61.5% done] [  3524/  3548 kb/s] [eta 00m:15s]
Threads: 2: [m_m] [65.8% done] [  3704/  3868 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=32421, got signal=6
Threads: 1: [m__] [66.7% done] [  3616/  3464 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=32419, got signal=6

fio: (groupid=0): err= 0: pid=32419
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.9%, 4=41.3%, 8=55.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.0%, 4=0.0%, 10=1.8%, 20=3.9%, 50=24.7%, 100=17.9%
     lat (msec): 250=35.6%, 500=13.3%, 750=1.0%, 1000=0.4%, >=2000=0.1%
fio: (groupid=0): err= 0: pid=32420
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=4.0%, 4=31.8%, 8=63.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.2%, 4=0.0%, 10=1.8%, 20=4.3%, 50=16.8%, 100=21.0%
     lat (msec): 250=50.2%, 500=4.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=32421
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.1%, 4=31.3%, 8=65.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=0.1%, 10=0.8%, 20=2.5%, 50=12.8%, 100=27.8%
     lat (msec): 250=49.3%, 500=5.1%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2994/2798, merge=541/170, ticks=55124/63940, in_queue=119056, util=98.67%
0.21user 0.36system 0:27.31elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2493minor)pagefaults 0swaps