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] [ 12798/  7127 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [19.0% done] [  3704/ 16123 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [22.7% done] [ 12956/  7072 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [ 15716/  3712 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [ 16760/  3259 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 14460/  2920 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 15009/  3338 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [43.5% done] [  6756/  7444 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [45.8% done] [ 13780/  2180 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 10616/  4524 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 10656/  2117 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  8608/  3356 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  7400/  3008 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  8376/  2118 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  8016/  1684 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18875, got signal=6
Threads: 2: [m_m] [62.1% done] [  5708/  2472 kb/s] [eta 00m:11s]
Threads: 2: [m_m] [63.3% done] [  4804/  2348 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18874, got signal=6
Threads: 1: [__m] [66.7% done] [  6088/  1510 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18876, got signal=6

fio: (groupid=0): err= 0: pid=18874
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=14.3%, 8=85.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.6%, 50=10.5%, 100=44.0%
     lat (msec): 250=43.7%, 500=0.6%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=18875
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=17.4%, 8=82.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.2%, 50=11.3%, 100=52.2%
     lat (msec): 250=33.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=18876
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=17.3%, 8=82.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.3%, 20=2.2%, 50=14.9%, 100=37.7%
     lat (msec): 250=43.4%, 500=0.9%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4190/1851, merge=444/162, ticks=48488/28856, in_queue=77344, util=98.93%
0.32user 0.26system 0:21.13elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
435976inputs+178000outputs (0major+2427minor)pagefaults 0swaps