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] [ 13043/  8171 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [18.2% done] [  5600/ 14256 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 17181/  3343 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [  8890/  9455 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [  1895/ 15810 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [ 10547/  6406 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 14331/  4356 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  9900/  7223 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 10579/  4193 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  9050/  5698 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 11031/  3522 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  8870/  3774 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  8977/  2521 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  5824/  4510 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5023/  4051 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5649/  3685 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26380, got signal=6
Threads: 2: [_mm] [63.3% done] [  7111/  1052 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26382, got signal=6
Threads: 1: [_m_] [64.5% done] [  6127/  1722 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26381, got signal=6

fio: (groupid=0): err= 0: pid=26380
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.4%, 8=93.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.3%, 10=0.2%, 20=1.3%, 50=9.4%, 100=48.2%
     lat (msec): 250=40.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26381
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.3%, 8=94.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.6%, 50=10.6%, 100=41.8%
     lat (msec): 250=44.4%, 500=1.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26382
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.4%, 8=93.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=2.0%, 50=11.6%, 100=45.8%
     lat (msec): 250=39.7%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3739/2308, merge=733/116, ticks=43268/32612, in_queue=75876, util=98.97%
0.21user 0.34system 0:21.18elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
386800inputs+227424outputs (0major+2459minor)pagefaults 0swaps