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] [ 11132/ 10298 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [18.2% done] [ 10465/ 11767 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 18991/  2054 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [ 19219/  1012 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [ 14329/  5906 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 13186/  5979 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [  8944/  9664 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [  5331/  9000 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  8911/  6026 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  8017/  6414 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 11181/  3494 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  7858/  4104 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  4624/  6786 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  8829/  2291 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  8757/   943 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6383/  2702 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=1561, got signal=6
Threads: 2: [_mm] [63.3% done] [  5405/  2098 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=1562, got signal=6
Threads: 1: [__m] [66.7% done] [  2786/  3546 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=1563, got signal=6

fio: (groupid=0): err= 0: pid=1561
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=3.7%, 8=95.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.0%, 20=0.5%, 50=7.7%, 100=48.2%
     lat (msec): 250=42.9%, 500=0.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=1562
  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=0.7%, 50=9.4%, 100=49.7%
     lat (msec): 250=39.1%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=1563
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.0%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.9%, 50=10.7%, 100=46.7%
     lat (msec): 250=40.1%, 500=1.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3540/2044, merge=506/73, ticks=42868/27112, in_queue=69968, util=98.28%
0.26user 0.46system 0:21.02elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
391400inputs+222656outputs (0major+2461minor)pagefaults 0swaps