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] [ 17409/  3180 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [17.4% done] [ 13321/  6605 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 10386/  9179 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [  9875/  9123 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [  9936/  8684 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [  9339/  9322 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 10715/  5205 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 14883/  2208 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 11222/  5133 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  9339/  4641 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  7134/  4632 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  9740/  3697 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  5792/  5011 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  8443/  2710 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  6251/  2973 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  7158/  2041 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  7740/   833 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27714, got signal=6
Threads: 2: [_mm] [64.5% done] [  6154/   597 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27715, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27716, got signal=6

fio: (groupid=0): err= 0: pid=27714
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.2%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.2%, 10=0.0%, 20=0.9%, 50=7.5%, 100=50.8%
     lat (msec): 250=40.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27715
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.0%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=3.0%, 50=7.8%, 100=47.6%
     lat (msec): 250=40.6%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27716
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=5.9%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=3.7%, 50=8.0%, 100=43.2%
     lat (msec): 250=43.9%, 500=0.5%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4197/1920, merge=769/126, ticks=49316/31400, in_queue=80708, util=99.02%
0.26user 0.34system 0:21.24elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
431608inputs+182792outputs (0major+2462minor)pagefaults 0swaps