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] [9.7% done] [ 15404/  1588 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [13.3% done] [ 10715/  5042 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [15.2% done] [ 10443/  5428 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [16.2% done] [  8313/  5213 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [18.9% done] [ 11532/  2312 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [21.1% done] [ 10975/  3982 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [23.7% done] [  8082/  4608 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [25.6% done] [  4429/  8663 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [28.2% done] [  6400/  6692 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [31.6% done] [  6257/  6895 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [33.3% done] [  8614/  2990 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [36.8% done] [  3758/  7602 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [37.5% done] [  6964/  3596 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [39.0% done] [  2909/  8240 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [40.5% done] [  3750/  6420 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [42.9% done] [  8309/   820 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [45.2% done] [  6940/  1909 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [48.8% done] [  4644/  4685 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [50.0% done] [  3311/  5278 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [51.2% done] [  5396/  3608 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [52.3% done] [  5384/  2198 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=16240, got signal=6
Threads: 2: [m_m] [54.5% done] [  4087/  3514 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=16241, got signal=6
Threads: 1: [m__] [59.5% done] [  2994/  6721 kb/s] [eta 00m:17s]
Threads: 1: [m__] [65.0% done] [  3974/  4352 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=16239, got signal=6

fio: (groupid=0): err= 0: pid=16239
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=1.9%, 4=33.0%, 8=64.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.2%, 4=0.7%, 10=1.3%, 20=8.1%, 50=28.7%, 100=12.7%
     lat (msec): 250=32.7%, 500=12.8%, 750=1.0%, 1000=0.0%, >=2000=0.5%
fio: (groupid=0): err= 0: pid=16240
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=1.4%, 4=27.1%, 8=71.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.4%, 20=2.1%, 50=14.4%, 100=28.8%
     lat (msec): 250=49.3%, 500=4.2%, 750=0.5%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=16241
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=1.9%, 4=25.1%, 8=72.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.2%, 10=0.7%, 20=4.3%, 50=12.0%, 100=28.1%
     lat (msec): 250=49.2%, 500=4.7%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3260/2441, merge=418/244, ticks=58732/38884, in_queue=97616, util=98.92%
0.20user 0.45system 0:27.03elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2496minor)pagefaults 0swaps