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] [13.6% done] [  9512/ 11743 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [  9343/ 12161 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [ 18189/     0 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 12068/  3884 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 14582/  4563 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 11149/  6780 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 10959/  6741 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [  8533/  7594 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [  9404/  6154 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [ 11612/  2534 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 10296/  4648 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  4457/  8240 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  6125/  5108 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  8521/  2629 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  6642/  2790 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  9237/   658 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6148/  1958 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12001, got signal=6
Threads: 2: [m_m] [66.7% done] [  7492/   260 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12002, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12000, got signal=6

fio: (groupid=0): err= 0: pid=12000
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.1%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.1%, 50=7.0%, 100=46.8%
     lat (msec): 250=43.8%, 500=0.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12001
  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=0.3%, 50=8.4%, 100=51.5%
     lat (msec): 250=39.1%, 500=0.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12002
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.4%, 8=93.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.4%, 20=3.9%, 50=6.5%, 100=47.1%
     lat (msec): 250=40.9%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3908/2033, merge=683/242, ticks=47832/34384, in_queue=82216, util=98.99%
0.16user 0.34system 0:21.43elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
417160inputs+196952outputs (0major+2454minor)pagefaults 0swaps