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] [  8240/  4441 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [11.1% done] [  9764/  2409 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [13.9% done] [  6144/  7639 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [16.2% done] [  6001/  5827 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [18.9% done] [ 10435/  2161 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [21.1% done] [  5684/  4989 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [23.7% done] [  8439/  3453 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [26.3% done] [  6078/  4717 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [28.9% done] [  6489/  3380 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [30.0% done] [  5229/  4254 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [31.7% done] [  7436/  2092 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [34.1% done] [  8322/  2023 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [36.6% done] [  6070/  2080 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [39.0% done] [  5870/  3280 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [40.5% done] [  4240/  4292 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [42.9% done] [  7256/  1772 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [44.2% done] [  6136/  4008 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [45.5% done] [  7604/     0 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [47.7% done] [  6720/   432 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [48.9% done] [  3980/  4064 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [51.1% done] [  5384/  1836 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [52.2% done] [  3724/  3144 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [53.2% done] [  3692/  3736 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [54.2% done] [  6256/  1992 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [55.1% done] [  4300/  2080 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [56.0% done] [  3764/  3380 kb/s] [eta 00m:22s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 3: [mmm] [55.8% done] [  2500/  4352 kb/s] [eta 00m:23s]
fio: pid=17044, got signal=6
Threads: 2: [_mm] [57.7% done] [  2860/  3128 kb/s] [eta 00m:22s]
Threads: 2: [_mm] [59.6% done] [  3788/  1600 kb/s] [eta 00m:21s]
Threads: 2: [_mm] [65.3% done] [   396/  8056 kb/s] [eta 00m:17s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17045, got signal=6
fio: pid=17046, got signal=6

fio: (groupid=0): err= 0: pid=17044
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=1.0%, 4=17.6%, 8=81.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.5%, 20=1.9%, 50=18.1%, 100=11.7%
     lat (msec): 250=60.8%, 500=6.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17045
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=3.0%, 4=16.1%, 8=80.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.4%, 4=0.0%, 10=3.0%, 20=4.5%, 50=13.1%, 100=8.7%
     lat (msec): 250=61.4%, 500=6.8%, 750=0.8%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17046
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.1%, 4=12.1%, 8=85.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.0%, 10=1.8%, 20=1.3%, 50=9.2%, 100=9.2%
     lat (msec): 250=68.6%, 500=7.5%, 750=1.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3249/2355, merge=668/297, ticks=79992/36728, in_queue=116720, util=98.67%
0.06user 0.29system 0:34.41elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2527minor)pagefaults 0swaps