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] [ 16148/  6261 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [16.0% done] [ 22310/   927 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [20.0% done] [ 16225/  4580 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [25.0% done] [ 15688/  5068 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 14370/  3941 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [  7968/  9703 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [37.5% done] [  9597/  8915 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 10945/  5779 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [ 11860/  3095 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [ 12605/  3095 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [ 11356/  3184 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  6111/  6440 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  9261/  3233 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  4307/  5511 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  7992/  2186 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6495/  2066 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23580, got signal=6
Threads: 2: [m_m] [63.3% done] [  3340/  3210 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23581, got signal=6
Threads: 1: [m__] [64.5% done] [  5450/  1728 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23579, got signal=6

fio: (groupid=0): err= 0: pid=23579
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.3%, 8=92.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=4.0%, 50=13.0%, 100=32.9%
     lat (msec): 250=47.4%, 500=1.5%, 750=0.5%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23580
  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=0.0%, 20=0.4%, 50=7.9%, 100=50.6%
     lat (msec): 250=40.1%, 500=0.4%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23581
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=7.2%, 8=92.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.4%, 20=1.9%, 50=9.6%, 100=49.6%
     lat (msec): 250=37.0%, 500=0.9%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3961/1605, merge=899/111, ticks=48628/21436, in_queue=70048, util=98.93%
0.22user 0.37system 0:21.03elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
453264inputs+160576outputs (0major+2449minor)pagefaults 0swaps