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] [ 14342/  6670 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 11576/  9176 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 13316/  6562 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [25.0% done] [ 14874/  4218 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 11913/  6426 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [ 16758/     0 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 10144/  5991 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 11950/  4185 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  9200/  5527 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  4470/  9111 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  8708/  4120 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  9192/  4986 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [  7415/  3888 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  6434/  4791 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  8545/  2356 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.1% done] [  6731/  2867 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [61.3% done] [  4213/  4205 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18624, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18625, got signal=6
Threads: 1: [m__] [62.5% done] [  6752/  1297 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18623, got signal=6

fio: (groupid=0): err= 0: pid=18623
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=8.5%, 8=91.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.1%, 10=0.2%, 20=4.6%, 50=12.6%, 100=34.4%
     lat (msec): 250=46.1%, 500=1.0%, 750=0.3%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=18624
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=5.1%, 8=94.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.5%, 50=11.9%, 100=37.2%
     lat (msec): 250=49.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=18625
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.9%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=1.4%, 50=11.2%, 100=40.2%
     lat (msec): 250=46.1%, 500=0.3%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3952/2000, merge=713/207, ticks=49460/29940, in_queue=79388, util=98.20%
0.28user 0.77system 0:21.62elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
421176inputs+193176outputs (0major+2452minor)pagefaults 0swaps