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] [ 10748/  9984 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [18.2% done] [ 16223/  6242 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 10464/  8752 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [  9564/ 10056 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 12545/  5528 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [ 12760/  4773 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 10767/  6250 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 11495/  5188 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  8455/  7002 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  9531/  4773 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [52.0% done] [  4556/  7943 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  5249/  6545 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  3749/  6207 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  8648/  2315 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5344/  3776 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  7648/  1780 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  3241/  3769 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15499, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15500, got signal=6
Threads: 1: [__m] [66.7% done] [  6210/  1492 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15501, got signal=6

fio: (groupid=0): err= 0: pid=15499
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.5%, 4=20.8%, 8=78.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.1%, 20=1.5%, 50=9.1%, 100=47.7%
     lat (msec): 250=41.1%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15500
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=20.5%, 8=79.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.0%, 20=1.1%, 50=8.0%, 100=45.4%
     lat (msec): 250=44.1%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15501
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=23.7%, 8=76.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.2%, 50=14.0%, 100=39.7%
     lat (msec): 250=44.5%, 500=1.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3425/2597, merge=572/133, ticks=42252/35656, in_queue=77904, util=98.27%
0.45user 0.42system 0:21.55elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
362016inputs+252072outputs (0major+2442minor)pagefaults 0swaps