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] [ 18214/  4157 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [  9823/ 10400 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [  8358/ 10185 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 11132/  7008 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 15392/  5953 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 10547/  5804 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 10138/  8187 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  7886/  9607 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  7825/  7154 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  9199/  6022 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  9282/  5564 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  7484/  5336 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [ 12003/     0 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  8785/  1777 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5828/  3144 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  4152/  4083 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29589, got signal=6
Threads: 2: [mm_] [63.3% done] [  1753/  5800 kb/s] [eta 00m:11s]
Threads: 2: [mm_] [64.5% done] [  6251/  1057 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29587, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29588, got signal=6

fio: (groupid=0): err= 0: pid=29587
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=7.4%, 8=92.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.3%, 20=1.6%, 50=12.6%, 100=45.5%
     lat (msec): 250=38.6%, 500=0.5%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29588
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.1%, 8=95.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.5%, 50=9.0%, 100=40.7%
     lat (msec): 250=46.6%, 500=1.0%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29589
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.5%, 8=95.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.0%, 50=10.1%, 100=49.0%
     lat (msec): 250=40.4%, 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=3583/2256, merge=738/271, ticks=42952/32280, in_queue=75216, util=98.82%
0.18user 0.40system 0:21.25elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
390120inputs+224168outputs (0major+2457minor)pagefaults 0swaps