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
Threads: 3
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Threads: 3: [mmm] [50.0% done] [  8029/  4413 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [52.3% done] [  7366/  5474 kb/s] [eta 00m:21s]
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Threads: 3: [mmm] [59.1% done] [  4470/  5255 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [61.4% done] [  4977/  3994 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [63.6% done] [  3624/  4860 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [64.4% done] [  2521/  3660 kb/s] [eta 00m:16s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=30207, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=30206, got signal=6
Threads: 1: [__m] [66.7% done] [  4531/  2611 kb/s] [eta 00m:15s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=30208, got signal=6

fio: (groupid=0): err= 0: pid=30206
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.1%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.9%, 50=4.4%, 100=51.3%
     lat (msec): 250=40.3%, 500=2.0%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=30207
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.1%, 8=94.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.4%, 50=6.7%, 100=49.2%
     lat (msec): 250=42.1%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=30208
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.1%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.5%, 20=2.0%, 50=6.4%, 100=41.0%
     lat (msec): 250=48.4%, 500=0.2%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3709/5277, merge=782/56095, ticks=48164/1540604, in_queue=1552472, util=99.91%
0.51user 0.87system 0:30.74elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
435912inputs+178240outputs (0major+2494minor)pagefaults 0swaps