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] [ 20471/  3819 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 15175/  5580 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [  8440/ 11454 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [ 12991/  4547 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 14854/  3770 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 15354/  2212 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 12495/  3941 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [43.5% done] [ 12161/  3559 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [45.8% done] [ 12548/  3201 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  7939/  5812 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [52.0% done] [ 11771/  3009 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [56.0% done] [ 12214/  1106 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [57.7% done] [  6190/  4201 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  7207/  3164 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5393/  3770 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  2957/  4897 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  3636/  3644 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4464, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4466, got signal=6
Threads: 1: [_m_] [64.5% done] [  2104/  4331 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4465, got signal=6

fio: (groupid=0): err= 0: pid=4464
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.1%, 8=95.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=8.4%, 100=49.6%
     lat (msec): 250=41.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4465
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.3%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.5%, 50=13.0%, 100=46.3%
     lat (msec): 250=37.2%, 500=1.4%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4466
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.0%, 8=94.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.1%, 20=0.6%, 50=8.7%, 100=47.9%
     lat (msec): 250=41.0%, 500=1.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3664/1851, merge=901/79, ticks=44660/29008, in_queue=73668, util=98.46%
0.20user 0.31system 0:21.37elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
438576inputs+175768outputs (0major+2458minor)pagefaults 0swaps