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] [  7960/ 12397 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [18.2% done] [ 14244/  5116 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [  9672/  9440 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 14285/  3965 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 12951/  3868 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [  6809/  8712 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [  7972/  9709 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [ 10152/  4531 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [  8598/  7630 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  8944/  5462 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  6804/  6003 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  8257/  4449 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [  7829/  4409 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  6756/  3921 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.6% done] [  4067/  5747 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  6609/  2106 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [63.3% done] [  5356/  3266 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28848, got signal=6
Threads: 2: [_mm] [62.5% done] [  2324/  4815 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28850, got signal=6
Threads: 1: [_m_] [65.6% done] [  3896/  3075 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28849, got signal=6

fio: (groupid=0): err= 0: pid=28848
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.1%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.9%, 50=9.2%, 100=45.7%
     lat (msec): 250=43.6%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28849
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.1%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=2.3%, 50=14.0%, 100=38.6%
     lat (msec): 250=43.5%, 500=0.7%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28850
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.1%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=0.7%, 50=11.1%, 100=38.8%
     lat (msec): 250=48.4%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3629/2574, merge=621/209, ticks=43156/36860, in_queue=80012, util=99.22%
0.45user 0.44system 0:22.28elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
381416inputs+232640outputs (0major+2466minor)pagefaults 0swaps