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] [13.0% done] [  9532/ 10496 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [  6367/ 13685 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [  7094/ 12974 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [25.0% done] [  6639/  9984 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 12499/  7062 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 11280/  6590 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [ 18086/     0 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  7212/  7887 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  9723/  6960 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  5050/  8277 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [ 11008/   954 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  9772/  2921 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.7% done] [  5274/  4790 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [55.2% done] [  6680/  4022 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  8915/  1280 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  6103/  2360 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [59.4% done] [  8687/    56 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=30795, got signal=6
Threads: 2: [mm_] [60.6% done] [  4701/  2287 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=30793, got signal=6
Threads: 1: [_m_] [63.6% done] [  3340/  3023 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=30794, got signal=6

fio: (groupid=0): err= 0: pid=30793
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.6%, 8=93.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.9%, 50=10.5%, 100=47.7%
     lat (msec): 250=38.6%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=30794
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.6%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=1.4%, 50=22.9%, 100=18.7%
     lat (msec): 250=54.7%, 500=1.5%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=30795
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.3%, 8=92.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=3.1%, 50=8.5%, 100=47.8%
     lat (msec): 250=40.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3754/2439, merge=508/114, ticks=44104/42156, in_queue=86260, util=98.92%
0.20user 0.36system 0:22.46elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
370360inputs+243632outputs (0major+2452minor)pagefaults 0swaps