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] [15.0% done] [ 17917/  5356 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [19.0% done] [  7720/ 13707 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [ 17453/  4002 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [27.3% done] [ 16058/  2782 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [ 11210/  6556 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [  6682/  9408 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [  7720/  9005 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 11650/  3636 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 14744/  2106 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 11031/  2525 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  8887/  5572 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  8513/  3803 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  5808/  5613 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  5637/  5422 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5596/  2940 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6898/  2794 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22367, got signal=6
Threads: 2: [mm_] [63.3% done] [  6680/  1381 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 2: [mm_] [64.5% done] [  2993/  3164 kb/s] [eta 00m:11s]
fio: pid=22366, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22365, got signal=6

fio: (groupid=0): err= 0: pid=22365
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.7%, 8=95.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.1%, 50=7.1%, 100=44.8%
     lat (msec): 250=44.6%, 500=0.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22366
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.1%, 8=95.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.2%, 50=9.9%, 100=47.5%
     lat (msec): 250=41.3%, 500=0.3%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22367
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=5.4%, 8=94.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.0%, 20=1.4%, 50=8.9%, 100=42.3%
     lat (msec): 250=46.8%, 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=3795/2015, merge=888/62, ticks=46636/29492, in_queue=76116, util=99.16%
0.17user 0.41system 0:21.08elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
408728inputs+205072outputs (0major+2455minor)pagefaults 0swaps