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] [ 10961/ 10856 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [17.4% done] [ 15985/  5442 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [20.0% done] [  9798/  7716 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [24.0% done] [ 12275/  6817 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [29.2% done] [ 12401/  7280 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [  9200/  8749 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [  7509/  9622 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 14281/  1419 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  9729/  5495 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  8855/  5267 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  8187/  5206 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  4966/  6926 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  6532/  4645 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  2603/  6837 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  3278/  5792 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  5682/  3494 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3279, got signal=6
Threads: 2: [mm_] [59.4% done] [  7793/   675 kb/s] [eta 00m:13s]
Threads: 2: [mm_] [60.6% done] [  3070/  4185 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3277, got signal=6
Threads: 1: [_m_] [65.6% done] [  4421/  2843 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3278, got signal=6

fio: (groupid=0): err= 0: pid=3277
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.4%, 8=94.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.5%, 50=11.5%, 100=44.9%
     lat (msec): 250=40.9%, 500=0.5%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3278
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=5.4%, 8=94.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=1.1%, 50=20.9%, 100=20.0%
     lat (msec): 250=56.3%, 500=0.7%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3279
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=6.5%, 8=93.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.1%, 20=1.1%, 50=9.2%, 100=57.4%
     lat (msec): 250=31.7%, 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=3363/2740, merge=547/149, ticks=40748/36904, in_queue=77644, util=98.94%
0.21user 0.34system 0:22.04elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
356984inputs+257240outputs (0major+2469minor)pagefaults 0swaps