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] [13.6% done] [ 16193/  5262 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [  9302/ 10880 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 16091/  4344 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [ 13336/  5067 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [ 15826/  2367 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 15729/  2208 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 13520/  3229 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 10093/  5863 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  8045/  6052 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  8317/  4291 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  8106/  6150 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  7866/  3945 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  6589/  4974 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  5918/  4929 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5262/  1942 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5954/  3046 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  5271/  3091 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [64.5% done] [  6333/  1496 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17543, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17541, got signal=6
Threads: 1: [_m_] [65.6% done] [  4820/  1854 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17542, got signal=6

fio: (groupid=0): err= 0: pid=17541
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.0%, 8=95.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.5%, 50=7.0%, 100=41.7%
     lat (msec): 250=50.0%, 500=0.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17542
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.6%, 8=95.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.3%, 50=12.6%, 100=38.8%
     lat (msec): 250=46.9%, 500=0.6%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17543
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.9%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.2%, 10=0.1%, 20=1.8%, 50=6.4%, 100=47.9%
     lat (msec): 250=43.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3796/2321, merge=604/175, ticks=46360/34112, in_queue=80468, util=99.08%
0.17user 0.32system 0:22.29elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
398256inputs+215992outputs (0major+2461minor)pagefaults 0swaps