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] [  9762/ 11047 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [18.2% done] [  8200/ 12877 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 12698/  7602 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [ 21500/   134 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 12324/  4518 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [ 11121/  7131 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 15175/  2818 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 11242/  5332 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  9802/  5666 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  5997/  7911 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  6593/  7386 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  9626/  2117 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  5186/  6406 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  6497/  3502 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [ 10327/     0 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [64.3% done] [  8553/  1166 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13828, got signal=6
Threads: 2: [m_m] [63.3% done] [  6512/   593 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13827, got signal=6
Threads: 1: [__m] [66.7% done] [  4721/  2779 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13829, got signal=6

fio: (groupid=0): err= 0: pid=13827
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.8%, 8=93.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.7%, 50=9.4%, 100=45.1%
     lat (msec): 250=42.2%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13828
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.2%, 8=93.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.0%, 50=9.6%, 100=50.6%
     lat (msec): 250=38.5%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13829
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.8%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.0%, 50=10.7%, 100=46.3%
     lat (msec): 250=40.0%, 500=1.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3806/1987, merge=913/100, ticks=45016/29564, in_queue=74576, util=97.95%
0.33user 0.56system 0:20.90elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
399024inputs+214936outputs (0major+2452minor)pagefaults 0swaps