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] [  8424/  4796 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [11.1% done] [  6520/  6632 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [13.5% done] [  8156/  4408 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [16.2% done] [  7508/  4940 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [19.4% done] [  3336/ 11180 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [21.6% done] [  3964/  7840 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [24.3% done] [ 10220/  1040 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [26.3% done] [  6356/  2440 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [28.2% done] [  5896/  4404 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [30.0% done] [  5648/  4456 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [33.3% done] [  4844/  5140 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.9% done] [  4756/  4792 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [37.5% done] [  3733/  5458 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [40.0% done] [  2456/  9636 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [42.5% done] [  5136/  4592 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [43.9% done] [  5948/  2216 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.2% done] [  5621/  2118 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.6% done] [  4668/  3332 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [48.8% done] [  4488/  3467 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [50.0% done] [  2544/  4864 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [52.3% done] [  3252/  4268 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [53.3% done] [  4688/  1500 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [54.3% done] [  6128/   512 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [56.5% done] [  4000/  1932 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [57.4% done] [  3564/  3280 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [58.3% done] [  2900/  4668 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 3: [mmm] [59.2% done] [  5152/   636 kb/s] [eta 00m:20s]
fio: pid=17787, got signal=6
Threads: 2: [m_m] [60.0% done] [  3308/  3764 kb/s] [eta 00m:20s]
Threads: 2: [m_m] [60.8% done] [  5692/   856 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17786, got signal=6
Threads: 1: [__m] [65.3% done] [   180/  8268 kb/s] [eta 00m:17s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17788, got signal=6

fio: (groupid=0): err= 0: pid=17786
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=1.1%, 4=17.1%, 8=81.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.0%, 10=1.5%, 20=3.2%, 50=16.8%, 100=7.4%
     lat (msec): 250=63.1%, 500=5.9%, 750=0.7%, 1000=0.6%, >=2000=0.1%
fio: (groupid=0): err= 0: pid=17787
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=1.7%, 4=17.7%, 8=80.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.0%, 10=1.6%, 20=2.6%, 50=16.0%, 100=8.3%
     lat (msec): 250=64.9%, 500=5.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17788
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=3.4%, 4=17.4%, 8=78.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.3%, 4=0.0%, 10=2.3%, 20=3.4%, 50=14.7%, 100=2.3%
     lat (msec): 250=67.7%, 500=6.5%, 750=0.7%, 1000=0.7%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2983/2558, merge=479/403, ticks=74496/38332, in_queue=112828, util=98.81%
0.12user 0.35system 0:33.86elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2522minor)pagefaults 0swaps