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] [  9058/ 11035 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [19.0% done] [  8354/ 12157 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [22.7% done] [ 12833/  6520 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [  9339/  9383 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [ 17632/  2464 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 11734/  4742 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 11804/  6062 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 14687/  2147 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 12698/  3624 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 11230/  2513 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  6607/  6745 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  9062/  2810 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  9989/  1452 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  8830/  2420 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  6022/  3409 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6048/  2456 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6459/  1362 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23881, got signal=6
Threads: 2: [mm_] [64.5% done] [  5169/  2066 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23880, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 1: [m__] [67.7% done] [  3611/  2237 kb/s] [eta 00m:10s]
fio: pid=23879, got signal=6

fio: (groupid=0): err= 0: pid=23879
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.3%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.1%, 20=0.8%, 50=7.9%, 100=43.6%
     lat (msec): 250=46.2%, 500=0.8%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23880
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.0%, 8=94.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.7%, 50=8.2%, 100=52.0%
     lat (msec): 250=38.1%, 500=0.4%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23881
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.0%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.5%, 20=1.9%, 50=8.0%, 100=46.9%
     lat (msec): 250=42.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3943/1984, merge=518/203, ticks=46428/29424, in_queue=75840, util=99.06%
0.16user 0.32system 0:21.49elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
412384inputs+201960outputs (0major+2457minor)pagefaults 0swaps