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] [14.3% done] [ 12271/  9196 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [19.0% done] [  6753/ 12539 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [22.7% done] [ 16021/  5173 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [  9126/  8586 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [ 10095/  9900 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [  5397/ 11844 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 15196/  1781 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  9057/  6692 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  6060/  8724 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 14748/   825 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  9387/  4193 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  8712/  2810 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  8476/  2774 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  5515/  5572 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  8013/  1545 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5596/  4502 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=24179, got signal=6
Threads: 2: [m_m] [63.3% done] [  5206/  2407 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=24180, got signal=6
Threads: 1: [m__] [66.7% done] [  6520/  1090 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=24178, got signal=6

fio: (groupid=0): err= 0: pid=24178
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.6%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.1%, 10=0.2%, 20=2.6%, 50=9.7%, 100=44.5%
     lat (msec): 250=41.1%, 500=1.1%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=24179
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.3%, 8=95.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.3%, 50=9.4%, 100=55.8%
     lat (msec): 250=32.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=24180
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.0%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.1%, 20=1.3%, 50=9.5%, 100=47.5%
     lat (msec): 250=40.6%, 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=3667/2096, merge=438/184, ticks=40956/36400, in_queue=77352, util=99.44%
0.18user 0.33system 0:20.88elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
392360inputs+221976outputs (0major+2464minor)pagefaults 0swaps