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] [ 10788/  9597 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 17181/  2452 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [ 10522/  8777 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 18177/  2586 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [  8192/ 10120 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [  5283/ 12080 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [  8045/  7402 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [  9432/  4205 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [ 12540/  2721 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [ 12035/  4075 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  9573/  3425 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  4889/  7199 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [ 10595/  1057 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  8732/  2892 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  4124/  6386 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.1% done] [  6139/  2742 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6959/  2245 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [64.5% done] [  3961/  2355 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28292, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28293, got signal=6
Threads: 1: [m__] [67.7% done] [  7171/   577 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28291, got signal=6

fio: (groupid=0): err= 0: pid=28291
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.1%, 8=94.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.4%, 50=11.0%, 100=35.0%
     lat (msec): 250=49.5%, 500=1.4%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28292
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.5%, 8=95.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.6%, 50=8.4%, 100=40.7%
     lat (msec): 250=49.7%, 500=0.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28293
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=5.9%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.5%, 10=0.0%, 20=1.1%, 50=6.9%, 100=55.1%
     lat (msec): 250=35.2%, 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=3832/2204, merge=737/131, ticks=46620/35364, in_queue=81980, util=98.55%
0.14user 0.34system 0:21.90elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
399784inputs+214384outputs (0major+2459minor)pagefaults 0swaps