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] [13.0% done] [  8757/ 13101 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [16.7% done] [  9566/ 10473 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 12593/  4738 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [26.1% done] [ 14472/  6190 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [  6430/ 11657 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [ 10079/  7350 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [  7768/  9229 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [ 12942/  3815 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 14325/   959 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [ 11100/  4506 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 10115/  3249 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [ 13394/     0 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  8143/  3018 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  6398/  4384 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  7297/  2009 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8043, got signal=6
Threads: 2: [m_m] [60.0% done] [  8976/     0 kb/s] [eta 00m:12s]
Threads: 2: [m_m] [63.3% done] [  3384/  5230 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8044, got signal=6
Threads: 1: [m__] [64.5% done] [  2933/  4628 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8042, got signal=6

fio: (groupid=0): err= 0: pid=8042
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=4.3%, 8=95.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.6%, 50=10.2%, 100=39.0%
     lat (msec): 250=48.3%, 500=1.1%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8043
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=7.4%, 8=92.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=2.0%, 50=11.1%, 100=54.4%
     lat (msec): 250=31.7%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8044
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.2%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.1%, 20=0.6%, 50=14.1%, 100=43.0%
     lat (msec): 250=41.3%, 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=3862/2104, merge=933/29, ticks=46504/28864, in_queue=75364, util=99.08%
0.16user 0.39system 0:21.11elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
397264inputs+216920outputs (0major+2458minor)pagefaults 0swaps