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] [13.0% done] [ 15928/  4449 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 14517/  6727 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 14590/  5340 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [  9180/ 10225 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 12917/  5953 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 14626/  3880 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [  7708/  8894 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 12812/  3401 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  7249/  7870 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [ 10136/  5043 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  9236/  4912 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  7049/  5775 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  9465/  2973 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  8842/  1639 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  4685/  4412 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.0% done] [  6886/  1830 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13665, got signal=6
Threads: 2: [m_m] [63.3% done] [  3864/  4547 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13666, got signal=6
Threads: 1: [m__] [64.5% done] [  2271/  3754 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13664, got signal=6

fio: (groupid=0): err= 0: pid=13664
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.7%, 8=95.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.2%, 50=13.5%, 100=40.2%
     lat (msec): 250=44.3%, 500=1.2%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13665
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.2%, 8=95.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.1%, 50=9.6%, 100=44.2%
     lat (msec): 250=44.6%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13666
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.4%, 8=95.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.2%, 50=9.9%, 100=45.6%
     lat (msec): 250=43.1%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3493/2462, merge=648/188, ticks=44240/34224, in_queue=78460, util=99.10%
0.24user 0.38system 0:21.45elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
388176inputs+226024outputs (0major+2462minor)pagefaults 0swaps