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] [ 11905/  9400 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [  8830/ 11832 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 12930/  6442 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 18373/  1220 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 13829/  4799 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 10490/  8074 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 13626/  4380 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 13929/  2340 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  7862/  7431 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  3477/  8728 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  9477/  5112 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [ 10453/  2172 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  9703/  1881 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  8867/  3140 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5676/  3848 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6257/  2844 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6711/   907 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13708, got signal=6
Threads: 2: [m_m] [64.5% done] [  5954/  1309 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13709, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13707, got signal=6

fio: (groupid=0): err= 0: pid=13707
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.6%, 8=95.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.1%, 50=7.1%, 100=47.1%
     lat (msec): 250=42.8%, 500=1.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13708
  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=0.0%, 20=1.8%, 50=7.0%, 100=51.2%
     lat (msec): 250=39.1%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13709
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.3%, 8=94.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.2%, 50=8.7%, 100=45.4%
     lat (msec): 250=42.1%, 500=0.8%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4215/1892, merge=547/186, ticks=51716/37968, in_queue=89680, util=99.22%
0.18user 0.33system 0:21.40elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
436712inputs+177400outputs (0major+2452minor)pagefaults 0swaps