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] [12.5% done] [ 17265/  4786 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [ 16924/  3758 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.0% done] [ 12515/  6058 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [25.0% done] [ 10229/  8824 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 15555/  3588 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [  6959/  9107 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [ 11031/  6479 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  8212/  6634 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 12852/  3242 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  8875/  5035 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  4787/  8452 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  7878/  5503 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  7720/  3603 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  5539/  5230 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  7829/  2505 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5385/  3965 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6357/  1875 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26377, got signal=6
Threads: 2: [m_m] [64.5% done] [  7549/  1032 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26378, got signal=6
Threads: 1: [m__] [67.7% done] [  5499/   874 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26376, got signal=6

fio: (groupid=0): err= 0: pid=26376
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.1%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.7%, 50=11.2%, 100=40.7%
     lat (msec): 250=44.6%, 500=0.9%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26377
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.5%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.1%, 50=9.1%, 100=46.9%
     lat (msec): 250=42.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26378
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.5%, 8=93.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.0%, 50=8.1%, 100=44.8%
     lat (msec): 250=43.6%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3961/2096, merge=637/51, ticks=48576/30996, in_queue=79564, util=98.35%
0.21user 0.58system 0:22.02elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
415376inputs+198760outputs (0major+2455minor)pagefaults 0swaps