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] [11.1% done] [ 11303/ 16115 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [13.8% done] [ 11353/  1584 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [23.8% done] [ 12966/ 28676 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.6% done] [  8920/ 11425 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [38.9% done] [  8220/ 22097 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [47.1% done] [  3432/ 77360 kb/s] [eta 00m:09s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28579, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28581, got signal=6
Threads: 1: [_m_] [47.4% done] [  4563/     0 kb/s] [eta 00m:10s]
Threads: 1: [_m_] [50.0% done] [  2226/     0 kb/s] [eta 00m:10s]
Threads: 1: [_m_] [50.0% done] [  1846/     0 kb/s] [eta 00m:11s]
Threads: 1: [_m_] [63.2% done] [  1125/ 17846 kb/s] [eta 00m:07s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28580, got signal=6

fio: (groupid=0): err= 0: pid=28579
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=77.3%, 4=4.6%, 8=18.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=63.4%, 4=14.4%, 10=1.4%, 20=1.2%, 50=0.9%, 100=0.3%
     lat (msec): 250=14.8%, 500=3.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28580
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=68.4%, 4=5.9%, 8=25.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=57.3%, 4=11.1%, 10=0.9%, 20=0.2%, 50=0.6%, 100=3.1%
     lat (msec): 250=20.2%, 500=5.7%, 750=0.5%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28581
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=72.4%, 4=7.0%, 8=20.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=61.4%, 4=11.3%, 10=1.6%, 20=1.9%, 50=3.7%, 100=2.1%
     lat (msec): 250=14.3%, 500=3.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=2323/2099, merge=558/35057, ticks=54504/1321484, in_queue=1431988, util=98.75%
3.73user 1.17system 0:12.76elapsed 38%CPU (0avgtext+0avgdata 0maxresident)k
262728inputs+417152outputs (0major+2461minor)pagefaults 0swaps