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] [ 11152/ 10957 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [18.2% done] [   624/ 18128 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 15968/  4068 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [ 19016/    56 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 13112/  5557 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 12512/  5788 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [  5107/ 11276 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 14419/  2966 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 11020/  4432 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 10228/  4920 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  2356/ 10176 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  5569/  6338 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [   656/ 10180 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  7432/  3256 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5010/  4371 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [64.3% done] [  9796/   964 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13969, got signal=6
Threads: 2: [m_m] [63.3% done] [  1816/  4436 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13968, got signal=6
Threads: 1: [__m] [66.7% done] [  4068/  2483 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13970, got signal=6

fio: (groupid=0): err= 0: pid=13968
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=10.9%, 8=88.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=0.2%, 50=9.1%, 100=44.1%
     lat (msec): 250=45.5%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13969
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=12.6%, 8=87.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=9.1%, 100=45.9%
     lat (msec): 250=44.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13970
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=14.2%, 8=85.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.1%, 50=12.1%, 100=41.7%
     lat (msec): 250=44.4%, 500=1.0%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3314/2546, merge=704/33, ticks=42548/33780, in_queue=76324, util=99.11%
0.31user 0.30system 0:21.34elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
372752inputs+241584outputs (0major+2440minor)pagefaults 0swaps