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] [ 13502/  7659 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [16.7% done] [  9786/  9668 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.0% done] [  2444/ 16514 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [24.0% done] [ 15891/  4580 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [29.2% done] [  8663/ 11654 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [  7931/ 10343 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [  6899/ 10284 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [ 12568/  3563 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [  8781/  6910 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  8375/  6609 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  7428/  5875 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  7484/  4124 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  2391/  7935 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  7431/  2851 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  7911/  2395 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  7720/  1911 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6699/  2371 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19967, got signal=6
Threads: 2: [mm_] [64.5% done] [  3400/  3270 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19966, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19965, got signal=6

fio: (groupid=0): err= 0: pid=19965
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.1%, 8=93.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.0%, 50=8.9%, 100=40.9%
     lat (msec): 250=46.0%, 500=1.4%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19966
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=4.4%, 8=95.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.0%, 20=0.1%, 50=10.7%, 100=46.2%
     lat (msec): 250=42.0%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19967
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.8%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.4%, 50=6.5%, 100=45.8%
     lat (msec): 250=44.8%, 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=3108/2625, merge=504/254, ticks=36932/40176, in_queue=77092, util=99.08%
0.21user 0.32system 0:21.08elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
328112inputs+285848outputs (0major+2461minor)pagefaults 0swaps