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] [15.0% done] [ 13679/  7553 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [19.0% done] [ 16733/  3457 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [ 19552/     0 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [27.3% done] [ 11983/  5684 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 18779/   833 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [ 13658/  3782 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 16237/  1651 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 16379/  2652 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 13894/   512 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 13775/     0 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 11014/  2627 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  4100/  7992 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  4567/  5454 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  3412/  6390 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  3514/  5774 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5515/  3392 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  5149/  2517 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7529, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7531, got signal=6
Threads: 1: [_m_] [64.5% done] [  3778/  2448 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7530, got signal=6

fio: (groupid=0): err= 0: pid=7529
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.1%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.4%, 50=7.4%, 100=50.6%
     lat (msec): 250=40.1%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=7530
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.0%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.0%, 20=1.9%, 50=11.1%, 100=44.0%
     lat (msec): 250=41.3%, 500=1.0%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=7531
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.7%, 8=95.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.6%, 50=7.1%, 100=52.7%
     lat (msec): 250=38.6%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3858/1722, merge=686/123, ticks=46272/24076, in_queue=70340, util=99.16%
0.18user 0.34system 0:21.10elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
468816inputs+145240outputs (0major+2452minor)pagefaults 0swaps