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] [13.0% done] [ 20037/  1365 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 11158/ 10016 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 14149/  4904 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 14260/  4706 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 15152/  4457 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 13304/  5100 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [  8208/  7793 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  7371/  9557 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 10837/  4624 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  9760/  3226 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  9772/  4636 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  8147/  5111 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  9334/  2847 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  9545/  2604 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  7180/  2962 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  3498/  5688 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  4518/  3579 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 3: [mmm] [64.5% done] [  3961/  1731 kb/s] [eta 00m:11s]
fio: pid=23853, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23852, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23854, got signal=6

fio: (groupid=0): err= 0: pid=23852
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.2%, 8=93.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.8%, 50=7.1%, 100=46.9%
     lat (msec): 250=43.9%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23853
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.6%, 8=93.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.9%, 50=9.1%, 100=42.3%
     lat (msec): 250=47.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23854
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=6.2%, 8=93.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.3%, 20=2.9%, 50=9.7%, 100=36.3%
     lat (msec): 250=49.4%, 500=0.3%, 750=0.1%, 1000=0.4%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3753/2172, merge=628/160, ticks=45176/32324, in_queue=77496, util=97.91%
0.44user 0.54system 0:21.26elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
409712inputs+204600outputs (0major+2451minor)pagefaults 0swaps