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] [ 18899/  3787 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [19.0% done] [ 22584/   463 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [ 10707/  7241 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [27.3% done] [  8594/  9906 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 11471/  6794 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [  9707/  7554 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 13051/  3120 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [43.5% done] [  5306/ 10199 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [45.8% done] [  8964/  6444 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 14925/   520 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [52.0% done] [  9309/  4152 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  6302/  5022 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  8037/  3031 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  7265/  3226 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  6513/  2836 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5254/  2998 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  5436/  3303 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8235, got signal=6
Threads: 2: [_mm] [64.5% done] [  6383/  1401 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8237, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8236, got signal=6

fio: (groupid=0): err= 0: pid=8235
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.6%, 8=95.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.3%, 50=7.6%, 100=44.2%
     lat (msec): 250=46.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8236
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.8%, 8=93.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=2.1%, 50=9.1%, 100=42.5%
     lat (msec): 250=44.8%, 500=0.9%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8237
  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=0.2%, 20=1.4%, 50=9.9%, 100=38.3%
     lat (msec): 250=49.5%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3916/2000, merge=537/164, ticks=47624/31480, in_queue=79100, util=98.00%
0.53user 0.62system 0:21.34elapsed 5%CPU (0avgtext+0avgdata 0maxresident)k
421280inputs+192880outputs (0major+2450minor)pagefaults 0swaps