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] [  6324/ 13572 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [18.2% done] [  9853/ 10594 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 13768/  7048 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [ 12092/  8120 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 12908/  7144 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [  9232/  8624 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 11364/  6220 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [43.5% done] [ 10828/  4796 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [45.8% done] [  5736/  9300 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  6053/  7387 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  7252/  5292 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  9372/  2712 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  6586/  4732 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  6104/  3188 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [ 10112/     0 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6064/  1916 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22443, got signal=6
Threads: 2: [m_m] [63.3% done] [  5256/  1988 kb/s] [eta 00m:11s]
Threads: 2: [m_m] [64.5% done] [  5716/  2140 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22444, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22442, got signal=6

fio: (groupid=0): err= 0: pid=22442
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=13.9%, 8=85.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.4%, 50=10.7%, 100=39.0%
     lat (msec): 250=47.7%, 500=1.2%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22443
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=14.1%, 8=85.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.7%, 50=9.3%, 100=44.6%
     lat (msec): 250=44.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22444
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=0.5%, 4=14.5%, 8=84.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=1.1%, 20=0.6%, 50=11.9%, 100=41.1%
     lat (msec): 250=43.6%, 500=0.5%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3465/2449, merge=734/223, ticks=42456/36784, in_queue=79236, util=99.44%
0.33user 0.45system 0:21.40elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
357000inputs+257328outputs (0major+2444minor)pagefaults 0swaps