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] [ 15354/  5336 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [ 18177/  3038 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 13677/  5335 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 11173/  8781 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 12092/  5735 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [ 11799/  4287 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 10636/  6951 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [38.5% done] [ 12674/  3339 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [ 12413/  3234 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [ 10888/  4303 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  5259/  8582 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  7256/  5657 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  7341/  3705 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [ 10482/  2509 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  5723/  3685 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.1% done] [  6325/  2977 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [61.3% done] [  2342/  5186 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8093, got signal=6
Threads: 2: [_mm] [64.5% done] [  2068/  5627 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8095, got signal=6
Threads: 1: [_m_] [67.7% done] [  6418/   817 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8094, got signal=6

fio: (groupid=0): err= 0: pid=8093
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.1%, 8=95.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.2%, 50=10.1%, 100=50.9%
     lat (msec): 250=38.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8094
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=5.1%, 8=94.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.1%, 20=1.0%, 50=11.5%, 100=38.6%
     lat (msec): 250=47.1%, 500=1.1%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8095
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.5%, 8=95.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.9%, 50=10.7%, 100=39.0%
     lat (msec): 250=48.0%, 500=0.4%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3778/2210, merge=643/177, ticks=47648/34156, in_queue=81800, util=98.25%
0.24user 0.55system 0:21.80elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
414264inputs+199904outputs (0major+2458minor)pagefaults 0swaps