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] [23.1% done] [ 14586/ 20931 kb/s] [eta 00m:10s]
Threads: 3: [mmm] [26.7% done] [ 12690/ 22932 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [45.5% done] [  3250/102810 kb/s] [eta 00m:06s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15385, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15386, got signal=6
Threads: 1: [m__] [46.2% done] [  4669/  7988 kb/s] [eta 00m:07s]
Threads: 1: [m__] [63.6% done] [  4681/ 17826 kb/s] [eta 00m:04s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15384, got signal=6

fio: (groupid=0): err= 0: pid=15384
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=3.3%, 2=70.0%, 4=6.7%, 8=20.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=60.9%, 4=11.6%, 10=1.2%, 20=2.4%, 50=7.2%, 100=3.4%
     lat (msec): 250=10.5%, 500=2.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15385
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=8.0%, 2=73.1%, 4=8.0%, 8=10.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=75.3%, 4=10.4%, 10=1.5%, 20=0.2%, 50=0.2%, 100=1.6%
     lat (msec): 250=9.8%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15386
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=76.4%, 4=8.7%, 8=14.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=69.3%, 4=12.0%, 10=1.4%, 20=1.2%, 50=1.1%, 100=2.8%
     lat (msec): 250=11.2%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=1742/675, merge=324/12719, ticks=32692/502556, in_queue=535248, util=90.38%
3.79user 1.12system 0:07.74elapsed 63%CPU (0avgtext+0avgdata 0maxresident)k
206416inputs+466888outputs (0major+2450minor)pagefaults 0swaps