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] [12.5% done] [  8724/ 12300 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [17.4% done] [ 12527/  9448 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 13056/  8102 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 13413/  4709 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 15920/  1653 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 12011/  5501 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 11849/  5725 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [  9298/  6727 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 10589/  4217 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  4502/  9902 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  8382/  5636 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  6493/  6278 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  2527/  7903 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  8224/  3271 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  6517/  2941 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6261/  2157 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  4973/  3982 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19484, got signal=6
Threads: 2: [m_m] [64.5% done] [  7391/  1040 kb/s] [eta 00m:11s]
Threads: 2: [m_m] [67.7% done] [  4307/  2523 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19485, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19483, got signal=6

fio: (groupid=0): err= 0: pid=19483
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=3.4%, 8=96.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.6%, 50=6.7%, 100=43.2%
     lat (msec): 250=47.9%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19484
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.9%, 8=92.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.4%, 20=3.1%, 50=8.5%, 100=49.3%
     lat (msec): 250=37.9%, 500=0.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19485
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.8%, 8=95.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.2%, 50=7.2%, 100=39.4%
     lat (msec): 250=50.8%, 500=0.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3635/2515, merge=488/145, ticks=42636/41568, in_queue=84204, util=98.84%
0.25user 0.32system 0:21.86elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
380688inputs+233488outputs (0major+2459minor)pagefaults 0swaps