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] [  7398/ 14338 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [18.2% done] [ 12243/  9501 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [ 12621/  6284 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 14138/  6162 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 12275/  8098 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 10443/  7220 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 10392/  6219 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  9436/  6894 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [ 12336/  2672 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [ 11218/  3258 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  9142/  3957 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  7227/  4946 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  7834/  3799 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  6418/  4177 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  7195/  2257 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7603, got signal=6
Threads: 2: [m_m] [60.0% done] [  4917/  2786 kb/s] [eta 00m:12s]
Threads: 2: [m_m] [61.3% done] [  3668/  3485 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7602, got signal=6
Threads: 1: [__m] [66.7% done] [  2615/  4571 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7604, got signal=6

fio: (groupid=0): err= 0: pid=7602
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=4.5%, 8=95.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.1%, 50=7.8%, 100=50.0%
     lat (msec): 250=39.8%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=7603
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 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=0.2%, 20=1.7%, 50=10.2%, 100=58.1%
     lat (msec): 250=29.7%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=7604
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.7%, 8=95.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.0%, 50=16.3%, 100=30.8%
     lat (msec): 250=50.0%, 500=1.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3374/2275, merge=529/190, ticks=38024/32216, in_queue=70236, util=98.87%
0.18user 0.33system 0:21.00elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
380616inputs+233384outputs (0major+2460minor)pagefaults 0swaps