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] [  5424/ 14250 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 12527/  7452 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [ 10441/  9237 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 10207/  9183 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [  8192/ 10516 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [  9171/  7830 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [  5879/  9150 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 16131/  1704 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 13738/  2438 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  8362/  5888 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  7574/  6318 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  7318/  4652 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  9984/  1357 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  9890/  1028 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  7111/  3856 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.1% done] [  5904/  2840 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  7627/  1056 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3642, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3641, got signal=6
Threads: 1: [__m] [64.5% done] [  4140/  2421 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3643, got signal=6

fio: (groupid=0): err= 0: pid=3641
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.5%, 8=93.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.4%, 20=1.6%, 50=7.3%, 100=43.1%
     lat (msec): 250=46.6%, 500=0.5%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3642
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.4%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.6%, 50=8.9%, 100=43.9%
     lat (msec): 250=45.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3643
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=7.3%, 8=92.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.1%, 10=0.4%, 20=3.2%, 50=12.4%, 100=38.1%
     lat (msec): 250=44.2%, 500=0.8%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3773/2146, merge=678/135, ticks=44320/31616, in_queue=75928, util=98.74%
0.37user 0.35system 0:21.14elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
388728inputs+225392outputs (0major+2452minor)pagefaults 0swaps