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] [13.6% done] [ 10992/  9550 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 13261/  6634 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [ 16659/  2835 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 12607/  6789 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 13721/  5537 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 13115/  6027 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 11929/  3481 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  8345/  7778 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  9473/  4707 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  9511/  3816 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  9641/  4363 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [56.0% done] [  7999/  3875 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [57.7% done] [  6975/  4572 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  8333/  2398 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.0% done] [  5600/  3410 kb/s] [eta 00m:10s]
Threads: 3: [mmm] [64.3% done] [  7459/  1941 kb/s] [eta 00m:10s]
Threads: 3: [mmm] [65.5% done] [  7265/   331 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15657, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15658, got signal=6
Threads: 1: [m__] [66.7% done] [  2496/  3643 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15656, got signal=6

fio: (groupid=0): err= 0: pid=15656
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=24.5%, 8=75.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.0%, 50=11.5%, 100=48.0%
     lat (msec): 250=39.0%, 500=0.2%, 750=0.3%, 1000=0.2%, >=2000=0.2%
fio: (groupid=0): err= 0: pid=15657
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=0.8%, 4=23.4%, 8=75.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.0%, 20=1.9%, 50=9.5%, 100=45.6%
     lat (msec): 250=42.6%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15658
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=25.9%, 8=73.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=12.4%, 100=43.8%
     lat (msec): 250=43.0%, 500=0.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3964/2106, merge=690/127, ticks=50120/29824, in_queue=79936, util=98.83%
0.47user 0.36system 0:21.44elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
420576inputs+193768outputs (0major+2442minor)pagefaults 0swaps