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] [  9538/ 11930 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [19.0% done] [ 10571/  9237 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [  7016/ 12951 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [27.3% done] [ 17677/  1671 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 10388/  8395 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [36.4% done] [ 14167/  3815 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [39.1% done] [ 11799/  5308 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [43.5% done] [  9225/  4844 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [45.8% done] [  8830/  5983 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 10986/  3510 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 10286/  2708 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [ 10376/  3140 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  5548/  4535 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  2147/  7126 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  7809/  2741 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  8151/  1468 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15296, got signal=6
Threads: 2: [mm_] [63.3% done] [  3965/  3624 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15294, got signal=6
Threads: 1: [_m_] [64.5% done] [  3807/  3591 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15295, got signal=6

fio: (groupid=0): err= 0: pid=15294
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=6.0%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.2%, 20=1.3%, 50=9.7%, 100=45.3%
     lat (msec): 250=42.1%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15295
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=8.1%, 8=91.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.2%, 20=2.7%, 50=11.1%, 100=41.5%
     lat (msec): 250=42.6%, 500=0.8%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15296
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.8%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.1%, 50=10.7%, 100=45.8%
     lat (msec): 250=41.9%, 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=3745/2125, merge=506/174, ticks=45004/32044, in_queue=77040, util=99.34%
0.23user 0.51system 0:21.34elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
417904inputs+196272outputs (0major+2455minor)pagefaults 0swaps