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] [14.3% done] [ 14978/  7525 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [19.0% done] [ 18572/  4140 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [ 19267/  1805 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [27.3% done] [ 12109/  6467 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 12593/  5332 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [ 15339/  2653 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 11288/  6757 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [43.5% done] [ 13588/  2620 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [45.8% done] [ 14138/   854 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  7744/  6353 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 11650/  2657 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  7415/  4335 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  3656/  6024 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  6247/  4189 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  6727/  2444 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6552/  2473 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [65.5% done] [  8269/   353 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=9774, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=9773, got signal=6
Threads: 1: [m__] [66.7% done] [  4226/  2442 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=9772, got signal=6

fio: (groupid=0): err= 0: pid=9772
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.7%, 8=92.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.2%, 20=2.8%, 50=8.2%, 100=46.2%
     lat (msec): 250=41.2%, 500=0.9%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=9773
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=3.9%, 8=95.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=7.5%, 100=47.7%
     lat (msec): 250=43.8%, 500=0.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=9774
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.1%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.6%, 50=8.0%, 100=48.9%
     lat (msec): 250=40.9%, 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=3912/1838, merge=898/197, ticks=47328/26220, in_queue=73540, util=98.99%
0.23user 0.38system 0:20.84elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
439376inputs+174704outputs (0major+2450minor)pagefaults 0swaps