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] [ 12564/  9256 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 17498/  3294 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [  9033/  9951 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [25.0% done] [  5723/ 11828 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 11796/  6562 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [ 14961/  3027 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 14368/  1901 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 10185/  6052 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [ 15254/  1645 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [ 10752/  4258 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  9805/  4213 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  6408/  5347 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [ 11316/  1747 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  6481/  4445 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  2511/  6968 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23697, got signal=6
Threads: 2: [m_m] [60.0% done] [  7009/  1036 kb/s] [eta 00m:12s]
Threads: 2: [m_m] [61.3% done] [  6566/  1922 kb/s] [eta 00m:12s]
Threads: 2: [m_m] [62.5% done] [  3189/  3537 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23698, got signal=6
Threads: 1: [m__] [67.7% done] [  1353/  4461 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23696, got signal=6

fio: (groupid=0): err= 0: pid=23696
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.6%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.2%, 20=1.3%, 50=17.2%, 100=37.6%
     lat (msec): 250=42.1%, 500=1.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23697
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=0.3%, 4=5.9%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.3%, 20=1.7%, 50=10.0%, 100=50.8%
     lat (msec): 250=36.7%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23698
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.3%, 8=94.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=2.2%, 50=9.7%, 100=44.3%
     lat (msec): 250=42.7%, 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=3813/2255, merge=645/131, ticks=45468/31316, in_queue=76784, util=98.83%
0.18user 0.39system 0:21.82elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
404480inputs+209952outputs (0major+2461minor)pagefaults 0swaps