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] [ 12206/  9217 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 20052/  2188 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 13479/  6650 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [  9770/  8993 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 14041/  5015 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 12161/  6849 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 10233/  5312 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  7078/  8208 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  6743/  7622 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [ 13527/  2186 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  9172/  4567 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [ 11421/  2070 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [ 10311/  2074 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  9391/  2237 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  4474/  5743 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  3921/  4864 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  3202/  3449 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28464, got signal=6
Threads: 2: [m_m] [64.5% done] [  1627/  4803 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28465, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28463, got signal=6

fio: (groupid=0): err= 0: pid=28463
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.8%, 8=95.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.3%, 20=0.4%, 50=8.7%, 100=42.3%
     lat (msec): 250=46.7%, 500=0.9%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28464
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.6%, 8=95.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.4%, 50=7.5%, 100=45.7%
     lat (msec): 250=45.7%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28465
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.7%, 8=93.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.2%, 50=9.1%, 100=46.5%
     lat (msec): 250=42.0%, 500=0.2%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3563/2235, merge=754/123, ticks=44836/29764, in_queue=74596, util=98.10%
0.32user 0.56system 0:21.31elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
396496inputs+217776outputs (0major+2456minor)pagefaults 0swaps