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] [12.0% done] [ 12267/  8541 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [16.7% done] [  9167/ 12292 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 17246/  3847 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 13344/  6188 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [  2798/ 13199 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [  9924/  6341 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 11442/  5420 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 12527/  5499 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [  7764/  6699 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  6394/  8427 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 11881/  2761 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [ 11751/  2725 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  7549/  3278 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  7119/  4352 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  8769/  1260 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  4478/  4759 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  4466/  3465 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7546, got signal=6
Threads: 2: [mm_] [66.7% done] [  7024/   785 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7544, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7545, got signal=6

fio: (groupid=0): err= 0: pid=7544
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.4%, 8=95.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.5%, 50=9.1%, 100=44.1%
     lat (msec): 250=44.1%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=7545
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=3.7%, 8=96.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.8%, 50=10.8%, 100=43.6%
     lat (msec): 250=43.1%, 500=1.0%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=7546
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=6.8%, 8=92.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.2%, 10=0.3%, 20=3.2%, 50=8.8%, 100=50.7%
     lat (msec): 250=36.3%, 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=3637/2517, merge=648/200, ticks=41748/37188, in_queue=78932, util=99.16%
0.19user 0.55system 0:21.48elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
364856inputs+249288outputs (0major+2456minor)pagefaults 0swaps