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] [12.5% done] [  8765/ 13256 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [ 17164/  4502 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 17404/  3677 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 16237/  4075 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [ 18133/  2542 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 14630/  2302 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 11323/  5238 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [38.5% done] [  8553/  7964 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.7% done] [  4917/  8033 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [44.4% done] [ 12194/  3066 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.4% done] [ 11917/  1692 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [50.0% done] [  7062/  5160 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.7% done] [  6097/  4401 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.3% done] [  6630/  4116 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27501, got signal=6
Threads: 2: [m_m] [54.8% done] [  3742/  3681 kb/s] [eta 00m:14s]
Threads: 2: [m_m] [58.1% done] [  7215/  2155 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27502, got signal=6
Threads: 1: [m__] [59.4% done] [  5393/  2269 kb/s] [eta 00m:13s]
Threads: 1: [m__] [64.5% done] [  4034/  3221 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27500, got signal=6

fio: (groupid=0): err= 0: pid=27500
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=8.1%, 8=91.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=2.6%, 50=25.2%, 100=22.7%
     lat (msec): 250=47.6%, 500=1.1%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27501
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 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=0.4%, 50=10.1%, 100=60.1%
     lat (msec): 250=28.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27502
  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=0.1%, 10=0.2%, 20=1.8%, 50=12.5%, 100=44.0%
     lat (msec): 250=40.1%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3675/1874, merge=690/139, ticks=42968/28776, in_queue=71732, util=98.80%
0.16user 0.31system 0:21.26elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
436128inputs+178192outputs (0major+2453minor)pagefaults 0swaps