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] [12.0% done] [  8212/ 11885 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [16.7% done] [ 10662/ 11316 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [21.7% done] [ 18574/  1714 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 16554/  3214 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 14047/  4551 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [ 11576/  5144 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [  8614/  9073 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [38.5% done] [  8903/  6022 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [  9561/  6960 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [  9890/  4941 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [ 10170/  4246 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  5290/  6018 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.7% done] [  7688/  3864 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [55.2% done] [  9402/  1312 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  5412/  4681 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  7289/  2499 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29177, got signal=6
Threads: 2: [m_m] [59.4% done] [  5351/  2616 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29176, got signal=6
Threads: 1: [__m] [62.5% done] [  4396/  3080 kb/s] [eta 00m:12s]
Threads: 1: [__m] [67.7% done] [  6546/   930 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29178, got signal=6

fio: (groupid=0): err= 0: pid=29176
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.8%, 8=93.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.2%, 50=9.9%, 100=52.3%
     lat (msec): 250=36.6%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29177
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.6%, 8=94.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.2%, 50=8.0%, 100=58.7%
     lat (msec): 250=31.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29178
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=8.3%, 8=91.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.8%, 20=4.2%, 50=18.5%, 100=23.8%
     lat (msec): 250=50.9%, 500=1.0%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3878/2199, merge=547/139, ticks=46304/37312, in_queue=83612, util=98.13%
0.19user 0.63system 0:21.63elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
400000inputs+214264outputs (0major+2447minor)pagefaults 0swaps