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: [mFm] [5.8% done] [  2493/  1216 kb/s] [eta 00m:49s]
Threads: 3: [mFm] [6.8% done] [  2123/   809 kb/s] [eta 00m:55s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27010, got signal=6
Threads: 2: [m_m] [10.2% done] [  7317/ 25454 kb/s] [eta 00m:44s]
Threads: 2: [m_m] [15.8% done] [ 10807/ 52353 kb/s] [eta 00m:32s]
Threads: 2: [F_m] [63.6% done] [  5458/ 74696 kb/s] [eta 00m:04s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27011, got signal=6
Threads: 1: [F__] [100.0% done] [     0/  9386 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27009, got signal=6

fio: (groupid=0): err= 0: pid=27009
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=78.9%, 4=9.9%, 8=10.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=79.5%, 4=4.9%, 10=1.6%, 20=0.7%, 50=1.6%, 100=4.1%
     lat (msec): 250=4.3%, 500=1.5%, 750=0.2%, 1000=0.5%, >=2000=0.4%
fio: (groupid=0): err= 0: pid=27010
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=32.2%, 2=50.1%, 4=15.1%, 8=2.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=90.9%, 4=3.5%, 10=2.5%, 20=0.5%, 50=0.3%, 100=0.2%
     lat (msec): 250=1.3%, 500=0.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27011
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=67.8%, 4=18.4%, 8=13.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=78.3%, 4=5.6%, 10=1.2%, 20=0.2%, 50=0.3%, 100=3.3%
     lat (msec): 250=7.7%, 500=1.5%, 750=0.6%, 1000=0.5%, >=2000=0.4%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=1138/4595, merge=17/60809, ticks=37828/1613128, in_queue=1650944, util=97.83%
2.27user 2.36system 0:15.76elapsed 29%CPU (0avgtext+0avgdata 0maxresident)k
138944inputs+522848outputs (0major+2488minor)pagefaults 0swaps