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] [13.0% done] [ 11129/  9138 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [18.2% done] [ 16416/  4490 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [ 11381/  9813 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [  9481/ 10819 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 12422/  3754 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [  7891/ 10286 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [  8187/  7614 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  7903/  7797 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 16449/  1008 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  9481/  5210 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  8924/  5076 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [ 12320/  1598 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [ 10185/   837 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  6601/  2786 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  7277/  2807 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6048/  2318 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  5560/  2574 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=20536, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=20537, got signal=6
Threads: 1: [__m] [64.5% done] [  5731/  1643 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=20538, got signal=6

fio: (groupid=0): err= 0: pid=20536
  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=0.6%, 50=6.3%, 100=46.4%
     lat (msec): 250=46.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=20537
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.8%, 8=93.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.7%, 50=7.6%, 100=48.4%
     lat (msec): 250=41.3%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=20538
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.4%, 8=93.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.3%, 20=1.9%, 50=11.3%, 100=43.8%
     lat (msec): 250=41.6%, 500=0.5%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3672/2107, merge=462/339, ticks=44156/31812, in_queue=75960, util=99.03%
0.35user 0.41system 0:21.09elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
397248inputs+216664outputs (0major+2451minor)pagefaults 0swaps