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] [  5818/ 14181 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 12934/  8269 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 15078/  5836 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 16091/  3087 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 13337/  4714 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 11629/  5714 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 15855/  2001 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [ 12792/  2306 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  5820/  5820 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  9375/  5808 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  6707/  6308 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  9892/  4112 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  6174/  5670 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [ 11039/   658 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  8639/  1586 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  7330/  2738 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6333/  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=31163, got signal=6
Threads: 2: [mm_] [64.5% done] [  7537/   402 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31161, got signal=6
Threads: 1: [_m_] [67.7% done] [  3904/  2505 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31162, got signal=6

fio: (groupid=0): err= 0: pid=31161
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.6%, 8=94.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.7%, 50=8.8%, 100=38.9%
     lat (msec): 250=49.3%, 500=0.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31162
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.7%, 8=92.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.2%, 50=12.5%, 100=38.5%
     lat (msec): 250=46.4%, 500=1.0%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31163
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.4%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.0%, 50=10.4%, 100=46.4%
     lat (msec): 250=41.6%, 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=4035/2009, merge=642/176, ticks=48876/32004, in_queue=80880, util=99.22%
0.21user 0.30system 0:21.62elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
414848inputs+199720outputs (0major+2457minor)pagefaults 0swaps