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] [ 13223/  9802 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [19.0% done] [ 14289/  6634 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [ 13097/  7114 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [27.3% done] [ 16083/  3856 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 10425/  8086 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [ 11653/  5238 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 17608/   687 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [  8196/  6586 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  7764/  7097 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 12645/  2688 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  9794/  3738 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [ 10193/  1972 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  4441/  5690 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  8875/  2863 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5213/  3905 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6050/  3088 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4044, got signal=6
Threads: 2: [m_m] [63.3% done] [  3030/  3567 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4045, got signal=6
Threads: 1: [m__] [64.5% done] [  4580/  2692 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4043, got signal=6

fio: (groupid=0): err= 0: pid=4043
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.0%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.2%, 10=0.1%, 20=3.0%, 50=11.5%, 100=44.6%
     lat (msec): 250=38.7%, 500=0.9%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4044
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=3.6%, 8=96.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=8.8%, 100=49.7%
     lat (msec): 250=40.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4045
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=4.9%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.0%, 20=0.4%, 50=8.6%, 100=46.4%
     lat (msec): 250=43.1%, 500=0.6%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3836/2175, merge=567/223, ticks=45892/33032, in_queue=78924, util=99.10%
0.22user 0.65system 0:21.28elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
404960inputs+209360outputs (0major+2456minor)pagefaults 0swaps