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] [ 19110/  2994 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 19033/  2584 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [  9509/ 10412 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [  9644/  9676 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [  3168/ 14016 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [  7931/ 10604 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [  8179/  9135 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 12686/  3445 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  7988/  6935 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  6833/  7301 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  7375/  6395 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  5991/  6121 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  5796/  6093 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  8744/  2507 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  8334/  1911 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  8993/  1004 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19155, got signal=6
Threads: 2: [mm_] [63.3% done] [  8651/     0 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19153, got signal=6
Threads: 1: [_m_] [66.7% done] [  4356/  2806 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19154, got signal=6

fio: (groupid=0): err= 0: pid=19153
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.3%, 8=95.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.5%, 50=9.1%, 100=41.5%
     lat (msec): 250=47.8%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19154
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=7.2%, 8=92.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=2.6%, 50=10.2%, 100=42.0%
     lat (msec): 250=43.5%, 500=0.8%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19155
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=4.8%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=1.5%, 50=8.1%, 100=44.0%
     lat (msec): 250=45.9%, 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=3506/2316, merge=526/218, ticks=41336/34788, in_queue=76120, util=98.98%
0.25user 0.32system 0:20.85elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
372344inputs+241656outputs (0major+2454minor)pagefaults 0swaps