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] [13.0% done] [  3128/ 17712 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [  8570/ 12650 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [  9488/  9748 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 18590/  1613 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 18874/     0 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 19208/     0 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 19659/     0 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 17173/     0 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [ 10467/  4583 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  9914/  3380 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  8931/  4343 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  1133/ 10199 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  8374/  3011 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  9297/  2860 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5725/  3766 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  2978/  5571 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  3876/  4169 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25819, got signal=6
Threads: 2: [_mm] [64.5% done] [  3860/  3002 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25820, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25821, got signal=6

fio: (groupid=0): err= 0: pid=25819
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.2%, 8=94.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.8%, 50=7.3%, 100=53.2%
     lat (msec): 250=37.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25820
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=5.2%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.9%, 50=8.0%, 100=51.4%
     lat (msec): 250=37.4%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25821
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.4%, 8=93.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.1%, 20=1.8%, 50=11.3%, 100=43.2%
     lat (msec): 250=41.9%, 500=0.8%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3882/2188, merge=534/94, ticks=46064/36288, in_queue=82344, util=98.84%
0.28user 0.52system 0:21.38elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
425920inputs+188096outputs (0major+2455minor)pagefaults 0swaps