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] [8.6% done] [ 11220/  1116 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [11.4% done] [  5608/  6744 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [13.5% done] [  9004/  4036 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [16.2% done] [  6820/  5844 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [18.9% done] [  6108/  6292 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [20.5% done] [  6460/  5356 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [23.7% done] [  6036/  5764 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [27.0% done] [  6864/  4416 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [28.9% done] [  4792/  5088 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [31.6% done] [  6340/  3208 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [33.3% done] [  9056/   788 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.0% done] [  6700/  2728 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [37.5% done] [  6084/  3124 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [40.0% done] [  2524/  7760 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.5% done] [  6608/  2604 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [43.9% done] [  5028/  5192 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.2% done] [  2700/  5856 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.6% done] [  1496/  7380 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [50.0% done] [  6124/  2036 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [51.2% done] [  2372/  4776 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [52.3% done] [  4556/  2564 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [54.5% done] [  5072/  1184 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [55.6% done] [  2160/  4020 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [56.5% done] [  2508/  4312 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [57.4% done] [  2432/  4100 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [58.3% done] [  2336/  4476 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [59.2% done] [  3344/  2224 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [58.8% done] [  2584/  5536 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4793, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4795, got signal=6
Threads: 1: [_m_] [60.8% done] [  4060/  2520 kb/s] [eta 00m:20s]
Threads: 1: [_m_] [65.3% done] [  6720/     0 kb/s] [eta 00m:17s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4794, got signal=6

fio: (groupid=0): err= 0: pid=4793
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.8%, 4=16.2%, 8=82.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.1%, 10=1.4%, 20=3.4%, 50=12.3%, 100=7.6%
     lat (msec): 250=67.9%, 500=6.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4794
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=13.5%, 8=85.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=2.7%, 50=22.7%, 100=3.3%
     lat (msec): 250=61.5%, 500=8.3%, 750=0.2%, 1000=0.2%, >=2000=0.5%
fio: (groupid=0): err= 0: pid=4795
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=12.1%, 8=87.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.4%, 20=2.4%, 50=8.4%, 100=8.3%
     lat (msec): 250=71.7%, 500=8.1%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3096/2414, merge=623/564, ticks=68568/44360, in_queue=112928, util=99.11%
0.08user 0.27system 0:33.79elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2514minor)pagefaults 0swaps