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] [14.3% done] [  8760/ 12897 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [18.2% done] [ 10069/  9171 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [ 15278/  3116 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [25.0% done] [ 14583/  3783 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [ 12316/  5896 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [30.8% done] [ 13478/  3685 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [34.6% done] [  8330/  8196 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [  9228/  6603 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.7% done] [ 15099/   666 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [44.4% done] [ 13628/  1479 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [  4266/  8305 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  5648/  5916 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.7% done] [  5294/  6310 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [55.2% done] [  4636/  5627 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.6% done] [  7497/  2604 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  8135/  1804 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [61.3% done] [  4998/  2507 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=20461, got signal=6
Threads: 2: [m_m] [62.5% done] [  5538/  2202 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=20462, got signal=6
Threads: 1: [m__] [65.6% done] [  1336/  5416 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=20460, got signal=6

fio: (groupid=0): err= 0: pid=20460
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.5%, 8=93.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.9%, 50=16.4%, 100=33.4%
     lat (msec): 250=47.8%, 500=0.8%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=20461
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.8%, 8=94.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=0.2%, 50=8.7%, 100=51.5%
     lat (msec): 250=38.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=20462
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=5.2%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.1%, 20=3.1%, 50=6.9%, 100=48.4%
     lat (msec): 250=40.4%, 500=0.5%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3717/2369, merge=449/140, ticks=45696/31884, in_queue=77572, util=99.01%
0.21user 0.37system 0:21.97elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
399704inputs+214720outputs (0major+2457minor)pagefaults 0swaps