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] [12.5% done] [  9867/ 11458 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [  9614/  9610 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.0% done] [  4855/ 13202 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [25.0% done] [ 11081/  7663 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [  7862/  8061 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 14394/  3713 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [34.6% done] [ 13304/  4059 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [ 11520/  5607 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [  6292/  8448 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [  6654/  4738 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [ 12715/  3733 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 11690/  1448 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  8509/  2859 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  5977/  4583 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.6% done] [  6715/  2680 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  6601/  3009 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [61.3% done] [  6290/  2088 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26948, got signal=6
Threads: 2: [m_m] [62.5% done] [  8330/     0 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26947, got signal=6
Threads: 1: [__m] [65.6% done] [  8224/     0 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26949, got signal=6

fio: (groupid=0): err= 0: pid=26947
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=7.0%, 8=92.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.1%, 10=0.1%, 20=1.5%, 50=9.4%, 100=45.7%
     lat (msec): 250=42.2%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26948
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.9%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.0%, 50=10.0%, 100=45.4%
     lat (msec): 250=42.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26949
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=7.6%, 8=92.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.3%, 20=5.2%, 50=10.8%, 100=35.9%
     lat (msec): 250=46.0%, 500=1.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4022/2122, merge=612/237, ticks=46980/34236, in_queue=81204, util=99.19%
0.19user 0.32system 0:21.74elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
406160inputs+208064outputs (0major+2456minor)pagefaults 0swaps