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] [ 13609/  8619 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 15558/  5194 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [20.8% done] [ 12751/  7069 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [  6639/ 12048 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 13044/  5686 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [ 13443/  4425 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 16636/   732 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 14019/  3413 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [ 10583/  5698 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  8777/  5331 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [ 10877/  2909 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [ 10701/  2407 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  6585/  5116 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  9634/  1109 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  3477/  6247 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6861/  2692 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  4534/  3202 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29448, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29447, got signal=6
Threads: 1: [m__] [64.5% done] [  6093/  1976 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29446, got signal=6

fio: (groupid=0): err= 0: pid=29446
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.7%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.0%, 50=12.9%, 100=38.9%
     lat (msec): 250=44.3%, 500=1.1%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29447
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.2%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=1.5%, 50=7.9%, 100=47.8%
     lat (msec): 250=41.5%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29448
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.1%, 8=94.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=0.9%, 50=7.2%, 100=47.4%
     lat (msec): 250=43.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3694/2132, merge=591/112, ticks=44900/30916, in_queue=75820, util=99.10%
0.22user 0.50system 0:21.22elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
399016inputs+214848outputs (0major+2450minor)pagefaults 0swaps