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] [14.3% done] [ 21541/     0 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [19.0% done] [ 16998/  3957 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [22.7% done] [ 13145/  6176 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [  6975/ 10868 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [  8403/ 10054 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [  9989/  8200 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [  7598/  8561 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 10443/  6473 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  6158/  7733 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [ 12304/  1855 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [ 10258/  3510 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  6975/  5259 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [  6105/  4954 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  7333/  3880 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [ 10624/   850 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  4519/  4140 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [61.3% done] [  3412/  3685 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27520, got signal=6
Threads: 2: [_mm] [64.5% done] [  4547/  2424 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27522, got signal=6
Threads: 1: [_m_] [65.6% done] [   881/  5550 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27521, got signal=6

fio: (groupid=0): err= 0: pid=27520
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.9%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.0%, 50=9.0%, 100=55.0%
     lat (msec): 250=35.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27521
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.0%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=0.4%, 50=13.9%, 100=32.6%
     lat (msec): 250=51.1%, 500=1.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27522
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.4%, 8=94.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.5%, 50=8.4%, 100=47.4%
     lat (msec): 250=42.4%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3623/2519, merge=691/143, ticks=46508/33040, in_queue=79532, util=99.07%
0.21user 0.39system 0:21.85elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
395656inputs+218664outputs (0major+2457minor)pagefaults 0swaps