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] [ 11620/  4768 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [12.5% done] [  5344/ 12032 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [14.7% done] [ 13753/   718 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [15.4% done] [  9289/  5209 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [17.9% done] [  6730/  7427 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [21.1% done] [  9146/  3844 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [23.7% done] [  6700/  5306 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [25.6% done] [  6412/  6741 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [27.5% done] [ 11174/   154 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [30.0% done] [  4433/ 10044 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [33.3% done] [  4648/  6875 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [36.8% done] [  3649/  8781 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [37.5% done] [  4266/  6903 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [39.0% done] [  5042/  5270 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [42.5% done] [  5136/  5542 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [43.9% done] [  3429/  6107 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [46.3% done] [  6139/  3124 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [47.6% done] [  4786/  4047 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [47.7% done] [  1410/  7996 kb/s] [eta 00m:23s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26513, got signal=6
Threads: 2: [m_m] [48.9% done] [  3116/  3669 kb/s] [eta 00m:23s]
Threads: 2: [m_m] [53.5% done] [  4071/  4847 kb/s] [eta 00m:20s]
Threads: 2: [m_m] [55.8% done] [  6676/     0 kb/s] [eta 00m:19s]
Threads: 2: [m_m] [58.1% done] [  6237/     0 kb/s] [eta 00m:18s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26514, got signal=6
Threads: 1: [m__] [63.4% done] [  7773/     4 kb/s] [eta 00m:15s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 1: [m__] [67.5% done] [  7253/     0 kb/s] [eta 00m:13s]
fio: pid=26512, got signal=6

fio: (groupid=0): err= 0: pid=26512
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=28.0%, 8=71.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.2%, 10=0.2%, 20=7.0%, 50=30.4%, 100=17.9%
     lat (msec): 250=27.7%, 500=13.2%, 750=2.1%, 1000=0.6%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26513
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=3.6%, 4=32.6%, 8=63.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=0.2%, 10=1.8%, 20=5.3%, 50=19.7%, 100=23.7%
     lat (msec): 250=42.7%, 500=5.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26514
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=1.8%, 4=23.1%, 8=74.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.1%, 10=0.4%, 20=2.6%, 50=9.1%, 100=25.9%
     lat (msec): 250=56.6%, 500=4.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3299/2475, merge=457/328, ticks=53588/60836, in_queue=114424, util=98.99%
0.22user 0.36system 0:27.74elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2494minor)pagefaults 0swaps