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] [5.7% done] [ 10349/ 10187 kb/s] [eta 00m:50s]
Threads: 3: [mmm] [10.0% done] [ 15814/  5068 kb/s] [eta 00m:36s]
Threads: 3: [mmm] [15.2% done] [ 19463/  3644 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [20.0% done] [ 12466/  8057 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [24.1% done] [ 12625/  5897 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [27.6% done] [ 13626/  4954 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [32.1% done] [ 14240/  4132 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [35.7% done] [ 10290/  5775 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [39.3% done] [ 10882/  4798 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [42.9% done] [  8074/  7424 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [44.8% done] [  6715/  6719 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [48.3% done] [ 11048/  2616 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [51.7% done] [  9745/  2525 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.3% done] [  8578/  3331 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [54.8% done] [  6712/  3799 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [58.1% done] [  4641/  5214 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4067, got signal=6
Threads: 2: [mm_] [59.4% done] [  8314/  1468 kb/s] [eta 00m:13s]
Threads: 2: [mm_] [60.6% done] [  3193/  4681 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4065, got signal=6
Threads: 1: [_m_] [63.6% done] [  5621/  2676 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4066, got signal=6

fio: (groupid=0): err= 0: pid=4065
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=4.5%, 8=95.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.2%, 10=0.2%, 20=1.0%, 50=13.7%, 100=34.8%
     lat (msec): 250=47.7%, 500=2.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4066
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.3%, 8=94.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.8%, 50=16.8%, 100=22.7%
     lat (msec): 250=55.0%, 500=1.1%, 750=0.3%, 1000=0.0%, >=2000=0.5%
fio: (groupid=0): err= 0: pid=4067
  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=1.8%, 50=9.4%, 100=56.7%
     lat (msec): 250=30.1%, 500=1.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3775/2479, merge=770/3203, ticks=48300/268724, in_queue=289016, util=100.00%
0.19user 0.40system 0:22.36elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
418424inputs+195904outputs (0major+2460minor)pagefaults 0swaps