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] [7.9% done] [ 12932/  3760 kb/s] [eta 00m:35s]
Threads: 3: [mmm] [9.5% done] [ 11486/  4997 kb/s] [eta 00m:38s]
Threads: 3: [mmm] [10.2% done] [  6064/ 10444 kb/s] [eta 00m:44s]
Threads: 3: [mmm] [12.5% done] [ 13576/   128 kb/s] [eta 00m:42s]
Threads: 3: [mmm] [14.0% done] [  8424/  6792 kb/s] [eta 00m:43s]
Threads: 3: [mmm] [15.4% done] [  5576/  7244 kb/s] [eta 00m:44s]
Threads: 3: [mmm] [18.8% done] [  7500/  7224 kb/s] [eta 00m:39s]
Threads: 3: [mmm] [21.3% done] [  7260/  5176 kb/s] [eta 00m:37s]
Threads: 3: [mmm] [23.4% done] [  6072/  7728 kb/s] [eta 00m:36s]
Threads: 3: [mmm] [25.5% done] [  7786/  5260 kb/s] [eta 00m:35s]
Threads: 3: [mmm] [26.5% done] [  6008/  5144 kb/s] [eta 00m:36s]
Threads: 3: [mmm] [28.6% done] [  5564/  4872 kb/s] [eta 00m:35s]
Threads: 3: [mmm] [31.2% done] [  7416/  2628 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [32.7% done] [  7780/  1232 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [34.7% done] [  5216/  3828 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [36.7% done] [  3992/  5280 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [38.8% done] [  7208/  1724 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [40.0% done] [  3560/  4892 kb/s] [eta 00m:30s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28694, got signal=6
Threads: 2: [m_m] [42.0% done] [  1484/  7276 kb/s] [eta 00m:29s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28695, got signal=6
Threads: 1: [m__] [44.9% done] [  4728/  3672 kb/s] [eta 00m:27s]
Threads: 1: [m__] [51.1% done] [  3916/  5436 kb/s] [eta 00m:22s]
Threads: 1: [m__] [57.1% done] [  8724/     0 kb/s] [eta 00m:18s]
Threads: 1: [m__] [62.5% done] [  3272/  6436 kb/s] [eta 00m:15s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28693, got signal=6

fio: (groupid=0): err= 0: pid=28693
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=3.3%, 4=36.5%, 8=59.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.2%, 10=2.0%, 20=7.7%, 50=40.6%, 100=11.3%
     lat (msec): 250=21.7%, 500=13.5%, 750=1.2%, 1000=0.5%, >=2000=0.5%
fio: (groupid=0): err= 0: pid=28694
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=3.6%, 4=34.7%, 8=61.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=0.2%, 10=1.9%, 20=4.8%, 50=15.2%, 100=29.5%
     lat (msec): 250=44.2%, 500=2.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28695
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=3.2%, 4=31.0%, 8=65.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.1%, 10=0.7%, 20=3.5%, 50=16.2%, 100=26.8%
     lat (msec): 250=48.9%, 500=2.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2980/2782, merge=358/286, ticks=48880/46756, in_queue=95628, util=99.06%
0.22user 0.38system 0:27.00elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2509minor)pagefaults 0swaps