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] [ 13620/  6408 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 14228/  7077 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 17815/  3241 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 12942/  6024 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [  7585/  9330 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [ 10829/  6538 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [ 13683/  3864 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 15310/  1175 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [  9892/  5690 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  9008/  5266 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  7667/  5519 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  7566/  4855 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [ 11991/   642 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  8509/  2721 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  7402/  2867 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  4466/  4010 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  5287/  2782 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4305, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4304, got signal=6
Threads: 1: [__m] [64.5% done] [  1858/  4205 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4306, got signal=6

fio: (groupid=0): err= 0: pid=4304
  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=0.1%, 20=0.4%, 50=9.6%, 100=39.3%
     lat (msec): 250=49.2%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4305
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=4.8%, 8=94.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=1.0%, 50=8.8%, 100=41.6%
     lat (msec): 250=47.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4306
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.2%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.2%, 50=14.8%, 100=43.8%
     lat (msec): 250=39.6%, 500=1.4%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3909/2000, merge=745/66, ticks=49056/26144, in_queue=75192, util=99.10%
0.21user 0.34system 0:21.33elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
432152inputs+182152outputs (0major+2456minor)pagefaults 0swaps