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] [14.3% done] [  9146/ 12678 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [18.2% done] [  7272/ 13695 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [  9532/ 10650 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [ 10024/  9297 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [  7838/ 11158 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 13841/  4710 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 12397/  5538 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [43.5% done] [ 12035/  5206 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [45.8% done] [  9000/  6083 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 11828/  1932 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [52.0% done] [  6444/  7025 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  9013/  3908 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  7094/  4376 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  5193/  4583 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  4059/  5477 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5538/  4002 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [65.5% done] [  5688/  2580 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27148, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27147, got signal=6
Threads: 1: [__m] [66.7% done] [  6233/  1036 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27149, got signal=6

fio: (groupid=0): err= 0: pid=27147
  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=1.3%, 50=6.4%, 100=45.6%
     lat (msec): 250=45.1%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27148
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.0%, 8=94.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.5%, 50=8.0%, 100=50.7%
     lat (msec): 250=39.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27149
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=4.7%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.2%, 20=1.8%, 50=8.1%, 100=42.5%
     lat (msec): 250=45.8%, 500=1.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3435/2228, merge=648/183, ticks=40700/31120, in_queue=71820, util=97.81%
0.15user 0.75system 0:21.18elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
368696inputs+245592outputs (0major+2460minor)pagefaults 0swaps