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] [ 20516/  1004 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [19.0% done] [ 21378/     0 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [ 19511/  3103 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [27.3% done] [ 11942/  6097 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [  8757/  9505 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [  5507/ 10010 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 16290/  1086 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 11283/  6296 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 11702/  2448 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 12015/  2383 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 12483/  1805 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  8688/  3937 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  5344/  5999 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  4600/  4571 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  8631/  1159 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5060/  2969 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28563, got signal=6
Threads: 2: [m_m] [63.3% done] [  6263/  1635 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28564, got signal=6
Threads: 1: [m__] [64.5% done] [  7203/  1155 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28562, got signal=6

fio: (groupid=0): err= 0: pid=28562
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=6.6%, 8=92.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.1%, 20=1.8%, 50=9.8%, 100=45.2%
     lat (msec): 250=41.3%, 500=0.8%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28563
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=6.5%, 8=93.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.5%, 10=0.4%, 20=2.3%, 50=9.0%, 100=51.8%
     lat (msec): 250=35.6%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28564
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.9%, 8=92.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.5%, 20=2.8%, 50=10.0%, 100=49.9%
     lat (msec): 250=35.8%, 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=4143/1568, merge=770/199, ticks=47660/25812, in_queue=73472, util=99.03%
0.19user 0.39system 0:20.95elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
463296inputs+151072outputs (0major+2452minor)pagefaults 0swaps