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] [ 23040/   300 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [20.0% done] [ 19386/  3941 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [23.8% done] [  8886/ 10581 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [28.6% done] [ 12576/  6704 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [33.3% done] [ 10479/  8159 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [36.4% done] [ 10101/  6595 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [39.1% done] [  6940/ 10378 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [43.5% done] [ 11008/  4823 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [45.8% done] [  5453/  9788 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  1714/ 10548 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [52.0% done] [ 10743/  3059 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  8037/  3299 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [ 10882/   938 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  8602/  1548 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.0% done] [  5737/  2673 kb/s] [eta 00m:10s]
Threads: 3: [mmm] [64.3% done] [  3929/  4270 kb/s] [eta 00m:10s]
Threads: 3: [mmm] [65.5% done] [  5071/  2547 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5400, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5399, got signal=6
Threads: 1: [m__] [66.7% done] [  3657/  3132 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5398, got signal=6

fio: (groupid=0): err= 0: pid=5398
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.5%, 8=94.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.1%, 50=10.2%, 100=42.3%
     lat (msec): 250=44.8%, 500=0.8%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=5399
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.1%, 8=94.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=8.7%, 100=49.4%
     lat (msec): 250=40.8%, 500=0.5%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=5400
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.7%, 8=92.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=1.6%, 50=8.7%, 100=47.7%
     lat (msec): 250=41.3%, 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=3323/2333, merge=586/118, ticks=38968/32432, in_queue=71396, util=98.31%
0.35user 0.56system 0:21.26elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
378384inputs+235768outputs (0major+2454minor)pagefaults 0swaps