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] [ 14360/  7415 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 17627/  3563 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 13738/  4912 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [  8537/ 10418 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 11877/  8224 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 11304/  5875 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 11028/  5798 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [  9671/  5550 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 13230/  2738 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 12580/  1865 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  8431/  4274 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  5099/  6521 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  8968/  2499 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  3844/  6001 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5869/  3632 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6432/  2681 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  5969/  1942 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31311, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31312, got signal=6
Threads: 1: [__m] [64.5% done] [  4957/  2417 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31313, got signal=6

fio: (groupid=0): err= 0: pid=31311
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.2%, 8=93.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.2%, 50=10.2%, 100=46.3%
     lat (msec): 250=42.7%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31312
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=4.8%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.2%, 20=1.4%, 50=8.6%, 100=41.8%
     lat (msec): 250=46.5%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31313
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=4.5%, 8=95.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.2%, 20=1.3%, 50=13.4%, 100=37.2%
     lat (msec): 250=46.5%, 500=0.6%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3701/2293, merge=453/173, ticks=46336/30840, in_queue=77176, util=98.80%
0.27user 0.39system 0:21.38elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
395000inputs+218904outputs (0major+2457minor)pagefaults 0swaps