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] [ 14447/  5133 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [17.4% done] [ 11446/  8667 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 15782/  2757 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 10837/  6879 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 13801/  3990 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [  8456/  9351 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [ 11319/  3213 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 13402/  3237 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [  9745/  5759 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  7341/  6333 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 13442/  1158 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [ 12210/  1008 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [ 10905/  1936 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  4998/  5718 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  7363/  2588 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6784/  3087 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21951, got signal=6
Threads: 2: [m_m] [63.3% done] [  6735/   776 kb/s] [eta 00m:11s]
Threads: 2: [m_m] [64.5% done] [  3624/  3420 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21950, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21952, got signal=6

fio: (groupid=0): err= 0: pid=21950
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.3%, 8=93.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.0%, 50=7.8%, 100=46.1%
     lat (msec): 250=42.5%, 500=1.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21951
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.6%, 8=94.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.4%, 50=9.9%, 100=52.3%
     lat (msec): 250=36.5%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21952
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.3%, 8=94.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.4%, 50=10.8%, 100=32.6%
     lat (msec): 250=53.5%, 500=1.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4028/1654, merge=745/144, ticks=49052/28308, in_queue=77356, util=99.07%
0.18user 0.37system 0:21.35elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
447208inputs+167040outputs (0major+2453minor)pagefaults 0swaps