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] [13.6% done] [ 12402/  9114 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [17.4% done] [ 13638/  6888 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 13971/  5629 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [  8818/  9519 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 14544/  3513 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 13315/  4993 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [  7294/  9716 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 12201/  2578 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 13402/  2469 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 12477/  2548 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  8984/  3883 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [ 12819/  2079 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [ 11189/   701 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  4548/  5218 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  7384/  1339 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [64.3% done] [  7435/  1402 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15723, got signal=6
Threads: 2: [_mm] [65.5% done] [  4308/  3082 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15725, got signal=6
Threads: 1: [_m_] [66.7% done] [  6671/  1024 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15724, got signal=6

fio: (groupid=0): err= 0: pid=15723
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=23.7%, 8=75.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.5%, 50=9.0%, 100=47.9%
     lat (msec): 250=42.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15724
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.4%, 4=24.0%, 8=75.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.7%, 50=10.5%, 100=45.1%
     lat (msec): 250=42.3%, 500=0.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15725
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.7%, 4=23.2%, 8=75.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.1%, 10=0.1%, 20=1.1%, 50=10.1%, 100=44.2%
     lat (msec): 250=43.2%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3991/1895, merge=565/124, ticks=47416/31456, in_queue=78872, util=98.88%
0.52user 0.48system 0:21.28elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
415656inputs+198560outputs (0major+2433minor)pagefaults 0swaps