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] [ 16282/  4811 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 15501/  5413 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 17266/  3685 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [  7834/ 10678 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 13898/  4559 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [  7044/ 10526 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 15518/  1190 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [ 11844/  4124 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [  5989/  8545 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  5656/  7870 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 11348/  3754 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [ 11629/  1236 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  9717/  2135 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  7960/  2515 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  5804/  3396 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5441/  3011 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  8366/   479 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12839, got signal=6
Threads: 2: [mm_] [64.5% done] [  4323/  3396 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12837, got signal=6
Threads: 1: [_m_] [67.7% done] [  3770/  2673 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12838, got signal=6

fio: (groupid=0): err= 0: pid=12837
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=3.4%, 8=96.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.0%, 50=9.4%, 100=41.9%
     lat (msec): 250=47.8%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12838
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.9%, 8=92.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=1.4%, 50=12.2%, 100=44.1%
     lat (msec): 250=40.6%, 500=0.8%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12839
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=6.1%, 8=93.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.1%, 20=0.9%, 50=7.8%, 100=46.0%
     lat (msec): 250=44.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4046/1975, merge=710/96, ticks=50760/27096, in_queue=77844, util=98.99%
0.35user 0.36system 0:21.67elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
431760inputs+182360outputs (0major+2455minor)pagefaults 0swaps