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] [  8423/ 11734 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [18.2% done] [ 15043/  6899 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [ 14132/  5660 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 10975/  8829 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 12808/  4990 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 17286/   508 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [  6842/ 10390 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  8318/  7284 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [ 11189/  3945 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  5790/  8513 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  8033/  4913 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  7728/  4645 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [  9941/  3022 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  4173/  6992 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  8590/  1744 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  8045/  1163 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=11740, got signal=6
Threads: 2: [mm_] [61.3% done] [  8834/     0 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=11739, got signal=6
Threads: 1: [m__] [64.5% done] [  6772/   585 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=11738, got signal=6

fio: (groupid=0): err= 0: pid=11738
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=8.3%, 8=91.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.1%, 10=0.1%, 20=4.3%, 50=16.8%, 100=23.3%
     lat (msec): 250=53.4%, 500=0.7%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=11739
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.7%, 8=93.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.2%, 20=2.4%, 50=10.6%, 100=47.3%
     lat (msec): 250=38.5%, 500=0.4%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=11740
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=7.3%, 8=92.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.3%, 20=1.8%, 50=10.8%, 100=58.6%
     lat (msec): 250=28.2%, 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=3990/1907, merge=564/101, ticks=45980/28744, in_queue=74724, util=97.92%
0.22user 0.87system 0:21.61elapsed 5%CPU (0avgtext+0avgdata 0maxresident)k
417056inputs+197352outputs (0major+2456minor)pagefaults 0swaps