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] [15.0% done] [ 17960/  3896 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [19.0% done] [ 16989/  4636 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [ 17408/  2962 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [27.3% done] [ 12625/  6830 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 13051/  5940 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [ 10349/  7838 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [  3742/ 11532 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 10711/  5302 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 12621/  3043 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 10130/  4896 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  8728/  5310 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  9167/  3084 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  6452/  5453 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  7346/  3258 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  6083/  3279 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [64.3% done] [  4396/  4242 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12442, got signal=6
Threads: 2: [mm_] [63.3% done] [  7338/   987 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12440, got signal=6
Threads: 1: [_m_] [66.7% done] [  5855/  1377 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12441, got signal=6

fio: (groupid=0): err= 0: pid=12440
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.2%, 8=94.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.6%, 50=9.7%, 100=41.0%
     lat (msec): 250=46.5%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12441
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=6.0%, 8=93.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.1%, 10=0.1%, 20=1.9%, 50=10.6%, 100=41.6%
     lat (msec): 250=44.0%, 500=1.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12442
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.8%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.8%, 50=8.0%, 100=47.5%
     lat (msec): 250=42.4%, 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=3983/1919, merge=607/96, ticks=47580/31108, in_queue=78688, util=98.71%
0.30user 0.32system 0:20.70elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
432624inputs+181656outputs (0major+2450minor)pagefaults 0swaps