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] [13.6% done] [  9269/ 10331 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [17.4% done] [ 11215/  9159 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [22.7% done] [ 11840/  7280 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [  9473/  8305 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 18674/   585 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 12727/  4726 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 16615/   902 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 13723/  2375 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 11397/  4173 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 11820/  2611 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 12332/  1995 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  8061/  4547 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [ 11921/  1110 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  7484/  3131 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  7009/  1430 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5535/  3384 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6906/  1338 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22067, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22066, got signal=6
Threads: 1: [__m] [64.5% done] [  5755/  1586 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22068, got signal=6

fio: (groupid=0): err= 0: pid=22066
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.3%, 8=93.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.6%, 50=8.7%, 100=50.0%
     lat (msec): 250=39.7%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22067
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.8%, 8=95.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.7%, 50=8.6%, 100=44.6%
     lat (msec): 250=44.5%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22068
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.4%, 8=94.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.8%, 50=11.9%, 100=37.8%
     lat (msec): 250=46.7%, 500=0.8%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4430/1572, merge=676/183, ticks=54020/27656, in_queue=81676, util=98.24%
0.24user 0.55system 0:21.37elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
471000inputs+143208outputs (0major+2452minor)pagefaults 0swaps