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] [10.7% done] [ 16416/  5979 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [14.8% done] [ 12308/  8208 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [18.5% done] [ 10264/  9098 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [22.2% done] [ 18043/   907 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [25.9% done] [ 16554/  2206 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [29.6% done] [ 11661/  5666 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [33.3% done] [ 13345/  3660 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [35.7% done] [ 12979/  3498 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [39.3% done] [  9871/  5458 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [41.4% done] [  7829/  6040 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [44.8% done] [ 11592/  3270 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [48.3% done] [ 10014/  3144 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [50.0% done] [  8964/  3636 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [53.3% done] [  9318/  1793 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [56.7% done] [  7179/  3241 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  6219/  3510 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3595, got signal=6
Threads: 2: [m_m] [59.4% done] [  6280/  1305 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3596, got signal=6
Threads: 1: [m__] [60.6% done] [  6939/     0 kb/s] [eta 00m:13s]
Threads: 1: [m__] [65.6% done] [  3628/  3343 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3594, got signal=6

fio: (groupid=0): err= 0: pid=3594
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.5%, 8=92.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=3.1%, 50=24.0%, 100=23.0%
     lat (msec): 250=47.8%, 500=0.9%, 750=0.5%, 1000=0.3%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3595
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.6%, 8=93.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=2.6%, 50=8.9%, 100=53.4%
     lat (msec): 250=34.4%, 500=0.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3596
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=6.4%, 8=93.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.2%, 20=2.1%, 50=8.4%, 100=49.9%
     lat (msec): 250=38.2%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4409/1857, merge=559/987, ticks=52216/107712, in_queue=149904, util=99.99%
0.14user 0.43system 0:21.95elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
455272inputs+159008outputs (0major+2453minor)pagefaults 0swaps