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] [13.6% done] [ 14630/  6288 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [17.4% done] [ 16501/  3892 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [20.8% done] [ 13402/  5800 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [  9587/  7516 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [ 12056/  4897 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [  8033/  8155 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [  9619/  6804 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 11039/  4405 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [ 15993/   703 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  9810/  5047 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  8257/  5104 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [ 10058/  2680 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [ 11661/  1358 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  9176/  1346 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  8289/  2403 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  7252/  1862 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18648, got signal=6
Threads: 2: [mm_] [61.3% done] [  7122/   797 kb/s] [eta 00m:12s]
Threads: 2: [mm_] [64.5% done] [  2204/  5068 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 2: [mm_] [65.6% done] [  6223/   996 kb/s] [eta 00m:11s]
fio: pid=18647, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18646, got signal=6

fio: (groupid=0): err= 0: pid=18646
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=4.1%, 8=95.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.1%, 20=0.7%, 50=10.4%, 100=41.8%
     lat (msec): 250=45.7%, 500=1.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=18647
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=3.6%, 8=96.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.3%, 50=7.8%, 100=39.6%
     lat (msec): 250=50.2%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=18648
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=7.9%, 8=91.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.2%, 20=3.0%, 50=11.0%, 100=58.4%
     lat (msec): 250=27.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4417/1724, merge=625/105, ticks=52896/23744, in_queue=76640, util=99.19%
0.16user 0.35system 0:21.97elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
457760inputs+156480outputs (0major+2458minor)pagefaults 0swaps