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] [13.6% done] [ 19082/  2397 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [17.4% done] [ 12422/  7036 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [20.8% done] [ 12178/  8440 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 14858/  3925 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 11572/  6410 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 14016/  4685 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 11987/  3494 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 12283/  5148 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [ 14862/  2269 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [ 10445/  4596 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  9719/  4051 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  5808/  5796 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  8663/  3945 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  4205/  5877 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  6410/  3795 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  4408/  3864 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  8342/   775 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7730, got signal=6
Threads: 2: [_mm] [66.7% done] [  7390/     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=7732, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7731, got signal=6

fio: (groupid=0): err= 0: pid=7730
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.1%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.3%, 50=8.3%, 100=42.8%
     lat (msec): 250=46.7%, 500=0.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=7731
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.3%, 8=93.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=1.7%, 50=11.1%, 100=40.8%
     lat (msec): 250=44.9%, 500=0.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=7732
  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=0.7%, 20=1.8%, 50=8.5%, 100=45.2%
     lat (msec): 250=42.7%, 500=0.4%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4002/1926, merge=691/158, ticks=49904/27636, in_queue=77536, util=99.15%
0.24user 0.36system 0:21.20elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
429776inputs+184464outputs (0major+2450minor)pagefaults 0swaps