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] [ 15696/  3933 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [17.4% done] [ 16546/  5670 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 18124/  3335 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [27.3% done] [ 18901/  2810 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [  7695/ 11031 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 16221/  3477 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [  9839/  5483 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 12540/  4063 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  9581/  5591 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 11474/  3689 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  8253/  4165 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  7805/  4571 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  6988/  4181 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  8472/  2249 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  6337/  3392 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5080/  3485 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  4807/  2948 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27222, got signal=6
Threads: 2: [_mm] [64.5% done] [  4222/  2692 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27223, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27224, got signal=6

fio: (groupid=0): err= 0: pid=27222
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=5.8%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.1%, 20=0.9%, 50=8.6%, 100=52.0%
     lat (msec): 250=37.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27223
  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=0.1%, 20=1.1%, 50=7.8%, 100=49.3%
     lat (msec): 250=40.5%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27224
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.5%, 8=95.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.8%, 50=6.7%, 100=43.9%
     lat (msec): 250=45.9%, 500=1.1%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3854/1880, merge=631/226, ticks=46488/31236, in_queue=77720, util=97.85%
0.19user 0.61system 0:21.37elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
431904inputs+182416outputs (0major+2454minor)pagefaults 0swaps