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] [ 10624/ 12218 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [16.7% done] [ 16164/  4270 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 11446/ 10457 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 12812/  6776 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [ 12678/  6174 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [  9684/  8509 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [34.6% done] [  9709/  7325 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [  9005/  6666 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.7% done] [ 10762/  4067 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [44.4% done] [  5853/  8684 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.4% done] [  9928/  1338 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.3% done] [ 11027/  1903 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [51.7% done] [  7886/  2680 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.3% done] [  5299/  5011 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [54.8% done] [  9184/   675 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12478, got signal=6
Threads: 2: [m_m] [56.2% done] [  6133/  1683 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12479, got signal=6
Threads: 1: [m__] [57.6% done] [  3965/  2745 kb/s] [eta 00m:14s]
Threads: 1: [m__] [64.5% done] [  4458/  3677 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12477, got signal=6

fio: (groupid=0): err= 0: pid=12477
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=9.9%, 8=89.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.7%, 20=4.6%, 50=25.1%, 100=13.2%
     lat (msec): 250=54.7%, 500=0.9%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12478
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.4%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.6%, 50=10.3%, 100=49.7%
     lat (msec): 250=36.7%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12479
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.1%, 8=92.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.8%, 50=13.5%, 100=52.9%
     lat (msec): 250=31.6%, 500=0.4%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3552/2228, merge=513/169, ticks=40612/31640, in_queue=72252, util=99.28%
0.22user 0.30system 0:21.27elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
374152inputs+240184outputs (0major+2457minor)pagefaults 0swaps