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] [11.5% done] [  7931/ 13137 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [14.8% done] [ 10376/  9363 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [19.2% done] [  9395/  9485 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [24.0% done] [ 11917/  8769 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [28.0% done] [ 15444/  3180 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 13116/  4811 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [34.6% done] [ 11669/  4889 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [ 10471/  3905 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [ 11706/  5302 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [  5226/  8826 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [  9118/  5343 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  5483/  6870 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [ 10599/  2037 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  6091/  5335 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.6% done] [  3197/  5214 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  6471/  3193 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [61.3% done] [  2725/  4807 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=30482, got signal=6
Threads: 2: [m_m] [62.5% done] [  4279/  2688 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=30481, got signal=6
Threads: 1: [__m] [65.6% done] [  4291/  2944 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=30483, got signal=6

fio: (groupid=0): err= 0: pid=30481
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.4%, 8=95.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.1%, 50=9.2%, 100=47.3%
     lat (msec): 250=41.8%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=30482
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.4%, 8=93.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=2.3%, 50=8.6%, 100=47.3%
     lat (msec): 250=41.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=30483
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=7.0%, 8=92.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=3.9%, 50=14.0%, 100=33.1%
     lat (msec): 250=46.9%, 500=1.3%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3400/2584, merge=475/218, ticks=40980/39756, in_queue=80736, util=98.34%
0.42user 0.52system 0:22.10elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
366072inputs+248152outputs (0major+2462minor)pagefaults 0swaps