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] [ 14953/  7712 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [  9918/ 11361 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [  8033/ 12678 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [ 13458/  4673 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [ 10630/  7314 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 13531/  4896 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [  9359/  7382 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 10049/  5948 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  7630/  8419 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 14807/   520 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [52.0% done] [  8895/  4242 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [ 13352/     0 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  4465/  6940 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  6867/  3766 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5636/  4193 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [64.3% done] [  6137/  2989 kb/s] [eta 00m:10s]
Threads: 3: [mmm] [65.5% done] [  7549/  1080 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25260, got signal=6
Threads: 2: [mm_] [66.7% done] [  4924/  1515 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25259, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25258, got signal=6

fio: (groupid=0): err= 0: pid=25258
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=5.2%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.1%, 20=0.2%, 50=6.9%, 100=48.2%
     lat (msec): 250=43.3%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25259
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.9%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=1.0%, 50=8.0%, 100=45.8%
     lat (msec): 250=43.7%, 500=0.8%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25260
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.0%, 8=92.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.4%, 20=3.2%, 50=9.9%, 100=42.8%
     lat (msec): 250=42.9%, 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=3816/2093, merge=650/91, ticks=45892/29140, in_queue=75028, util=98.62%
0.50user 0.36system 0:21.25elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
401624inputs+212696outputs (0major+2454minor)pagefaults 0swaps