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] [ 21942/     0 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [19.0% done] [ 18434/  2977 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [ 17277/  3153 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [27.3% done] [ 12828/  5987 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 17452/  3539 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [36.4% done] [ 11669/  5003 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [39.1% done] [  8257/  7394 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [43.5% done] [ 12202/  3307 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [45.8% done] [  9924/  5967 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 13645/  1019 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 10807/  1956 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  9756/  2824 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  7524/  2904 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  8916/  1757 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  8224/  1775 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  3469/  4820 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [61.3% done] [  2326/  4433 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15036, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15035, got signal=6
Threads: 1: [m__] [64.5% done] [  5678/  1212 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15034, got signal=6

fio: (groupid=0): err= 0: pid=15034
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.7%, 8=93.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.1%, 50=15.9%, 100=41.4%
     lat (msec): 250=40.1%, 500=0.4%, 750=0.2%, 1000=0.3%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15035
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.8%, 8=95.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.6%, 50=6.9%, 100=50.2%
     lat (msec): 250=40.2%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15036
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.4%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.5%, 50=9.9%, 100=50.3%
     lat (msec): 250=38.7%, 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=4214/1480, merge=728/167, ticks=51236/18144, in_queue=69384, util=98.99%
0.26user 0.34system 0:21.22elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
484000inputs+130152outputs (0major+2446minor)pagefaults 0swaps