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] [ 19365/  2660 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [ 16664/  5633 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 18759/  3689 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 14207/  4030 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [  7114/ 10949 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [30.8% done] [  7931/  7988 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [34.6% done] [ 10142/  6871 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [ 10498/  4372 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [ 16351/     0 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [ 14826/  1110 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  8045/  4840 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  6447/  5584 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  6975/  4335 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  6512/  4014 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  6711/  3201 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  4311/  3819 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  8838/   545 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17961, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17960, got signal=6
Threads: 1: [m__] [64.5% done] [  6955/   772 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17959, got signal=6

fio: (groupid=0): err= 0: pid=17959
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.3%, 8=94.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.1%, 50=12.0%, 100=37.7%
     lat (msec): 250=47.7%, 500=0.7%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17960
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.2%, 8=94.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=2.0%, 50=5.9%, 100=56.2%
     lat (msec): 250=34.3%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17961
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=7.9%, 8=91.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.7%, 50=8.2%, 100=50.7%
     lat (msec): 250=37.5%, 500=0.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4000/1895, merge=618/141, ticks=47432/32036, in_queue=79464, util=98.58%
0.24user 0.76system 0:21.53elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
434496inputs+179176outputs (0major+2451minor)pagefaults 0swaps