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
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22044, got signal=6
Threads: 2: [_mm] [60.0% done] [ 12054/117162 kb/s] [eta 00m:02s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22045, got signal=6
Threads: 1: [__F] [100.0% done] [     0/ 23721 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22046, got signal=6

fio: (groupid=0): err= 0: pid=22044
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=85.0%, 4=10.3%, 8=4.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=76.0%, 4=16.5%, 10=2.5%, 20=0.1%, 50=0.2%, 100=1.5%
     lat (msec): 250=3.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22045
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=2.6%, 2=73.8%, 4=12.5%, 8=11.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=55.8%, 4=20.5%, 10=12.6%, 20=0.3%, 50=4.0%, 100=3.4%
     lat (msec): 250=3.1%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22046
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=78.0%, 4=9.1%, 8=12.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=74.5%, 4=8.2%, 10=0.8%, 20=1.4%, 50=7.1%, 100=3.3%
     lat (msec): 250=4.3%, 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=987/3885, merge=218/62143, ticks=12588/1439904, in_queue=1457548, util=96.91%
3.85user 1.19system 0:13.88elapsed 36%CPU (0avgtext+0avgdata 0maxresident)k
118904inputs+529840outputs (0major+2481minor)pagefaults 0swaps