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] [13.6% done] [ 16131/  5527 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 15220/  3978 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [ 10914/  7192 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [25.0% done] [ 10071/  8431 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 11079/  6674 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 10616/  7679 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [ 13158/  4185 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 10498/  5779 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  5779/  8175 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  6851/  8126 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 13622/  1029 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  8005/  5034 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  6638/  4490 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  6430/  4807 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  6939/  3485 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  9111/   630 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  3990/  3514 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7704, got signal=6
Threads: 2: [m_m] [64.5% done] [  3990/  3518 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7705, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7703, got signal=6

fio: (groupid=0): err= 0: pid=7703
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.1%, 8=92.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.3%, 20=2.8%, 50=8.8%, 100=46.1%
     lat (msec): 250=40.2%, 500=1.1%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=7704
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.8%, 8=94.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=8.0%, 100=49.8%
     lat (msec): 250=41.5%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=7705
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=4.3%, 8=95.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=0.6%, 50=9.7%, 100=41.3%
     lat (msec): 250=47.4%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3725/2209, merge=493/153, ticks=44520/32792, in_queue=77308, util=99.12%
0.18user 0.34system 0:21.47elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
398168inputs+216176outputs (0major+2459minor)pagefaults 0swaps