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] [15.0% done] [ 18596/  5222 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [19.0% done] [  6440/ 13872 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [  9701/ 11966 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [27.3% done] [ 10783/  8798 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [  9366/  9638 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 12881/  5804 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 13165/  3092 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 12328/  4047 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 12023/  3986 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  5706/  7508 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 12507/   699 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  6739/  5169 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  4942/  5243 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  5684/  4303 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  3746/  5243 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  2407/  5865 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23847, got signal=6
Threads: 2: [m_m] [63.3% done] [  5804/  1850 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23848, got signal=6
Threads: 1: [m__] [66.7% done] [  3485/  3274 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23846, got signal=6

fio: (groupid=0): err= 0: pid=23846
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=6.5%, 8=92.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.6%, 10=0.2%, 20=2.8%, 50=13.6%, 100=40.4%
     lat (msec): 250=40.8%, 500=1.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23847
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.3%, 8=94.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.7%, 50=8.2%, 100=50.2%
     lat (msec): 250=39.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23848
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.2%, 8=94.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.3%, 50=10.3%, 100=48.0%
     lat (msec): 250=39.1%, 500=0.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3457/2249, merge=456/214, ticks=39500/31516, in_queue=71008, util=98.89%
0.22user 0.32system 0:20.78elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
399568inputs+214552outputs (0major+2455minor)pagefaults 0swaps