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] [ 17757/  3892 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 21239/   881 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 15185/  5851 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [  6920/ 11645 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 11442/  6221 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 16928/   763 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 15384/  2555 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 14587/  1657 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 10768/  5587 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 10231/  3770 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  8013/  3961 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  4189/  8029 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  5953/  4258 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [ 11174/   605 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  6700/  3417 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5030/  4441 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  3486/  3844 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25816, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 2: [mm_] [62.5% done] [  2620/  3478 kb/s] [eta 00m:12s]
fio: pid=25814, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25815, got signal=6

fio: (groupid=0): err= 0: pid=25814
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.2%, 8=95.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=9.1%, 100=45.0%
     lat (msec): 250=44.3%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25815
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.6%, 8=93.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=2.5%, 50=12.8%, 100=41.8%
     lat (msec): 250=40.4%, 500=1.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25816
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.2%, 8=93.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.1%, 20=3.5%, 50=7.6%, 100=45.7%
     lat (msec): 250=42.7%, 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=3821/2235, merge=621/155, ticks=46076/35144, in_queue=81212, util=98.86%
0.23user 0.42system 0:21.40elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
415128inputs+198896outputs (0major+2452minor)pagefaults 0swaps