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] [12.5% done] [  9910/ 11125 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [ 11914/  9447 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 17079/  1801 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 10609/  8204 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 16343/  1076 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [  8045/ 10715 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [  9914/  7078 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  8655/  6753 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  7931/  5120 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  7618/  7594 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [ 10849/  2588 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  4510/  7684 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [  8139/  3571 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  5770/  4075 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  3933/  6091 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  5733/  4087 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [61.3% done] [  6481/  1515 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29391, got signal=6
Threads: 2: [_mm] [62.5% done] [  5310/  2218 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29392, got signal=6
Threads: 1: [__m] [65.6% done] [  4100/  2149 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29394, got signal=6

fio: (groupid=0): err= 0: pid=29391
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=4.2%, 8=95.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.2%, 20=1.1%, 50=6.8%, 100=58.4%
     lat (msec): 250=33.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29392
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.6%, 8=94.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.6%, 50=9.5%, 100=42.2%
     lat (msec): 250=44.6%, 500=0.4%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29394
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=4.9%, 8=94.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.0%, 20=0.5%, 50=15.0%, 100=34.4%
     lat (msec): 250=48.6%, 500=0.8%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3576/2551, merge=645/49, ticks=43684/32656, in_queue=76332, util=98.21%
0.26user 0.53system 0:22.24elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
374680inputs+239488outputs (0major+2466minor)pagefaults 0swaps