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] [  8436/ 15887 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [19.0% done] [ 15051/  7273 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [ 10693/  8655 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [27.3% done] [ 13878/  4441 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 13711/  4978 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [ 12023/  5961 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 14146/  3514 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [43.5% done] [ 10609/  4364 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [45.8% done] [  8842/  4234 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  8379/  6414 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 12849/  2017 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  8675/  3644 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  2062/  8065 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  3575/  6383 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  9203/  1373 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [64.3% done] [  4620/  4803 kb/s] [eta 00m:10s]
Threads: 3: [mmm] [65.5% done] [  3770/  3868 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19641, got signal=6
Threads: 2: [_mm] [66.7% done] [  4144/  3006 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19643, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19642, got signal=6

fio: (groupid=0): err= 0: pid=19641
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.7%, 8=95.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.0%, 50=7.5%, 100=48.5%
     lat (msec): 250=42.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19642
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=3.8%, 8=95.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=8.0%, 100=50.9%
     lat (msec): 250=39.2%, 500=1.1%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19643
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=4.8%, 8=94.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.5%, 50=6.1%, 100=51.2%
     lat (msec): 250=40.8%, 500=0.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3386/2367, merge=584/82, ticks=41376/35060, in_queue=76420, util=99.05%
0.36user 0.32system 0:21.13elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
391736inputs+222216outputs (0major+2463minor)pagefaults 0swaps