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] [ 14744/  8627 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [19.0% done] [ 10861/ 10711 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [ 16737/  3449 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [28.6% done] [ 17526/  3241 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [31.8% done] [ 11690/  5971 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [ 11975/  5688 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [  9566/  6121 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 11999/  4148 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 13675/  2806 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  9794/  4218 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  9337/  4445 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [ 12031/   418 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  9290/  2928 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  7147/  3112 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  8069/  1850 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5849/  2835 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=2121, got signal=6
Threads: 2: [m_m] [63.3% done] [  3002/  3998 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=2120, got signal=6
Threads: 1: [__m] [66.7% done] [  3929/  2094 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=2122, got signal=6

fio: (groupid=0): err= 0: pid=2120
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.2%, 8=95.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.7%, 50=7.9%, 100=48.3%
     lat (msec): 250=42.0%, 500=0.3%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=2121
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=3.9%, 8=95.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=8.6%, 100=51.0%
     lat (msec): 250=39.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=2122
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.6%, 8=93.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.1%, 50=10.9%, 100=47.0%
     lat (msec): 250=38.3%, 500=0.6%, 750=0.5%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3841/1932, merge=557/141, ticks=45592/27860, in_queue=73456, util=99.03%
0.18user 0.35system 0:20.91elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
408344inputs+205752outputs (0major+2448minor)pagefaults 0swaps