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] [12.5% done] [  9110/ 11702 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.0% done] [ 10900/  9973 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [20.0% done] [ 13585/  6471 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [25.0% done] [ 14883/  6874 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 10998/  8159 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 12048/  4958 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [  9135/  7244 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 10689/  5332 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 11405/  3973 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [ 10620/  4091 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 10115/  4100 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  7785/  4673 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  5845/  5137 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  8517/  1635 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  6829/  3245 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  3640/  4506 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21283, got signal=6
Threads: 2: [mm_] [63.3% done] [  5169/  2940 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21282, got signal=6
Threads: 1: [m__] [64.5% done] [  6166/  1541 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21281, got signal=6

fio: (groupid=0): err= 0: pid=21281
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.5%, 8=95.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.8%, 50=14.7%, 100=39.4%
     lat (msec): 250=43.4%, 500=1.0%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21282
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.6%, 8=93.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.2%, 10=0.4%, 20=2.9%, 50=7.9%, 100=46.0%
     lat (msec): 250=41.6%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21283
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.5%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.9%, 50=7.8%, 100=59.2%
     lat (msec): 250=31.5%, 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=3592/2182, merge=555/177, ticks=42496/29412, in_queue=71904, util=97.04%
0.24user 0.70system 0:21.56elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
402168inputs+212048outputs (0major+2458minor)pagefaults 0swaps