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] [11.5% done] [ 14159/  6296 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [15.4% done] [ 14573/  4384 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [18.5% done] [ 12251/  5108 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [22.2% done] [ 13901/  4335 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [26.9% done] [  7972/ 10091 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [30.8% done] [ 12715/  3827 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [34.6% done] [ 12418/  3929 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [  7817/  7488 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [ 15891/  1488 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [  9684/  5031 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [  9664/  3339 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 10115/  2265 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.7% done] [  4791/  5230 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [55.2% done] [  9256/  1804 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.6% done] [  7460/  3214 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  6617/  2814 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [61.3% done] [  7061/  2412 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 3: [mmm] [62.5% done] [  8911/   203 kb/s] [eta 00m:12s]
fio: pid=13154, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13156, got signal=6
Threads: 1: [_m_] [63.6% done] [  7215/   687 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13155, got signal=6

fio: (groupid=0): err= 0: pid=13154
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.6%, 8=95.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.0%, 50=5.9%, 100=44.5%
     lat (msec): 250=46.4%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13155
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.6%, 8=93.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=3.0%, 50=14.1%, 100=32.5%
     lat (msec): 250=48.2%, 500=1.4%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13156
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.6%, 8=94.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.9%, 50=12.0%, 100=38.7%
     lat (msec): 250=45.7%, 500=2.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4080/1659, merge=560/414, ticks=46672/31964, in_queue=78632, util=98.76%
0.23user 0.29system 0:22.43elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
424680inputs+189496outputs (0major+2454minor)pagefaults 0swaps