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] [ 13976/  7752 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [17.4% done] [  9119/ 10762 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 12483/  6935 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [25.0% done] [ 11258/  7646 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 16636/  2774 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 11877/  6278 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 10235/  8216 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  8358/  7134 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  8078/  6251 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 14634/   427 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 11836/  2045 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [ 10756/  2466 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  7891/  3611 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  3555/  6300 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  6068/  3563 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6666/  2314 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31574, got signal=6
Threads: 2: [m_m] [63.3% done] [  7207/   683 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31573, got signal=6
Threads: 1: [__m] [64.5% done] [  4478/  2428 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31575, got signal=6

fio: (groupid=0): err= 0: pid=31573
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.1%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.2%, 50=9.2%, 100=45.0%
     lat (msec): 250=42.8%, 500=1.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31574
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.5%, 8=92.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=1.7%, 50=9.8%, 100=54.2%
     lat (msec): 250=33.6%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31575
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.6%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.3%, 50=10.6%, 100=37.3%
     lat (msec): 250=47.9%, 500=1.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3845/1754, merge=645/115, ticks=45544/24268, in_queue=69800, util=99.11%
0.21user 0.47system 0:21.13elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
424656inputs+189448outputs (0major+2447minor)pagefaults 0swaps