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] [15.8% done] [ 19536/  3128 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [19.0% done] [ 16080/  3656 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [ 20188/   136 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [28.6% done] [ 10344/  7824 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [31.8% done] [  7255/  9453 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [ 14244/  2628 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 14252/  3264 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [43.5% done] [ 12176/  4316 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [45.8% done] [  8516/  6274 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  9788/  4360 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [52.0% done] [ 11804/  1932 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  5842/  5890 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  8971/  1949 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  5148/  4163 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5462/  3989 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  7093/  2004 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=11487, got signal=6
Threads: 2: [m_m] [63.3% done] [  3713/  2798 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=11486, got signal=6
Threads: 1: [__m] [66.7% done] [  6935/  1047 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=11488, got signal=6

fio: (groupid=0): err= 0: pid=11486
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=17.6%, 8=82.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.9%, 50=9.9%, 100=41.9%
     lat (msec): 250=46.2%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=11487
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.6%, 4=21.7%, 8=77.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.0%, 20=1.7%, 50=12.0%, 100=46.5%
     lat (msec): 250=39.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=11488
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.5%, 4=20.9%, 8=78.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.0%, 20=1.7%, 50=15.4%, 100=35.0%
     lat (msec): 250=46.2%, 500=0.8%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4149/1776, merge=681/112, ticks=50092/25280, in_queue=75372, util=97.85%
0.40user 0.33system 0:21.55elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
454960inputs+159272outputs (0major+2433minor)pagefaults 0swaps