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] [  8805/  5059 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [11.1% done] [  9760/  2588 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [13.9% done] [  8516/  4282 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [16.7% done] [  4388/  9828 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [19.4% done] [  4276/  7136 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [21.6% done] [  9168/  2388 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [24.3% done] [  6312/  4808 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [26.3% done] [  6260/  3848 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [28.2% done] [  6072/  3220 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [30.0% done] [  6620/  2724 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [32.5% done] [  7920/  3044 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [35.0% done] [  7640/  2340 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [37.5% done] [  6248/  4424 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [39.0% done] [  5044/  5060 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [41.5% done] [  3740/  5176 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [43.9% done] [  5348/  3568 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.2% done] [  7152/  1672 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.6% done] [  3804/  3992 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [48.8% done] [  3732/  3620 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [51.2% done] [  6476/  1444 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [52.3% done] [  4252/  2372 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [53.3% done] [  3108/  4528 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [54.3% done] [  4036/  2104 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [55.3% done] [  6124/  1144 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [56.2% done] [  3349/  3916 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [57.1% done] [  1578/  5067 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [58.0% done] [  3056/  3404 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=9587, got signal=6
Threads: 2: [_mm] [58.8% done] [  4168/  2136 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=9589, got signal=6
Threads: 1: [_m_] [59.6% done] [  5932/  1208 kb/s] [eta 00m:21s]
Threads: 1: [_m_] [65.3% done] [  3488/  5744 kb/s] [eta 00m:17s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=9588, got signal=6

fio: (groupid=0): err= 0: pid=9587
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=1.0%, 4=16.0%, 8=82.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.8%, 20=0.9%, 50=16.1%, 100=10.4%
     lat (msec): 250=65.2%, 500=5.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=9588
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=2.3%, 4=18.6%, 8=78.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.0%, 10=2.5%, 20=5.4%, 50=18.0%, 100=2.1%
     lat (msec): 250=58.2%, 500=11.5%, 750=0.7%, 1000=0.4%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=9589
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.3%, 4=15.8%, 8=82.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.1%, 10=1.0%, 20=2.3%, 50=15.4%, 100=6.1%
     lat (msec): 250=66.4%, 500=8.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3256/2239, merge=642/315, ticks=78464/35580, in_queue=114048, util=98.85%
0.09user 0.27system 0:33.56elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2520minor)pagefaults 0swaps