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] [  9172/ 14744 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 16892/  5478 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [20.8% done] [  6963/ 11043 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 10294/  8887 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [ 12466/  7077 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 12178/  5210 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 17823/   471 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [38.5% done] [  9786/  6483 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [  8497/  6263 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [ 12458/  2029 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [  8562/  3864 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  7212/  4945 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  6825/  3762 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [ 10205/   606 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26812, got signal=6
Threads: 2: [m_m] [56.7% done] [  8228/   703 kb/s] [eta 00m:13s]
Threads: 2: [m_m] [58.1% done] [  6207/  2839 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26813, got signal=6
Threads: 1: [m__] [61.3% done] [  8118/     0 kb/s] [eta 00m:12s]
Threads: 1: [m__] [66.7% done] [  8879/     0 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26811, got signal=6

fio: (groupid=0): err= 0: pid=26811
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=8.5%, 8=91.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=4.3%, 50=20.7%, 100=24.0%
     lat (msec): 250=49.5%, 500=1.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26812
  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=2.7%, 50=9.1%, 100=59.3%
     lat (msec): 250=28.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26813
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=8.7%, 8=91.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.9%, 50=11.5%, 100=57.5%
     lat (msec): 250=28.2%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3897/1829, merge=596/175, ticks=40688/26812, in_queue=67500, util=97.99%
0.21user 0.54system 0:20.81elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
396584inputs+217720outputs (0major+2448minor)pagefaults 0swaps