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] [ 11930/ 11018 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [18.2% done] [ 13906/  7667 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [  9855/ 10058 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [  6813/ 10294 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 15948/  3437 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 10934/  5160 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 15350/  3412 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 14862/  1545 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  9749/  6280 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  5818/  6611 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 11763/  2249 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [ 11612/  1094 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  5417/  5218 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  6292/  3050 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  6182/  3457 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.1% done] [  5763/  3973 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6048/  2200 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29706, got signal=6
Threads: 2: [_mm] [64.5% done] [  3001/  3896 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29708, got signal=6
Threads: 1: [_m_] [67.7% done] [     0/  5657 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29707, got signal=6

fio: (groupid=0): err= 0: pid=29706
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.1%, 8=95.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.2%, 50=7.6%, 100=49.3%
     lat (msec): 250=42.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29707
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.6%, 8=95.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=11.9%, 100=45.9%
     lat (msec): 250=40.4%, 500=0.9%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29708
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.0%, 8=94.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.6%, 50=8.1%, 100=47.7%
     lat (msec): 250=42.3%, 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=3489/2407, merge=673/211, ticks=42292/34100, in_queue=76388, util=99.07%
0.30user 0.27system 0:21.66elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
386352inputs+227816outputs (0major+2457minor)pagefaults 0swaps