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] [12.0% done] [ 19015/  3697 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [16.7% done] [ 17335/  5251 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.0% done] [ 10595/  9404 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [24.0% done] [ 11605/  8293 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [28.0% done] [ 15733/  4677 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 11897/  4958 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 11694/  5723 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [38.5% done] [ 11479/  4437 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [  9420/  5491 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [  8517/  5908 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [ 13742/   755 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  5836/  5621 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  7647/  3006 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  6426/  3990 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  7142/  2167 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  4039/  3477 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17463, got signal=6
Threads: 2: [m_m] [59.4% done] [  4523/  2582 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17464, got signal=6
Threads: 1: [m__] [64.5% done] [  4498/  2774 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17462, got signal=6

fio: (groupid=0): err= 0: pid=17462
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=7.8%, 8=91.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.2%, 20=3.0%, 50=22.9%, 100=21.0%
     lat (msec): 250=51.4%, 500=1.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17463
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.8%, 8=93.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=0.3%, 50=7.4%, 100=64.0%
     lat (msec): 250=27.5%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17464
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.7%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.7%, 50=9.3%, 100=57.0%
     lat (msec): 250=31.1%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3876/1908, merge=730/215, ticks=43992/26040, in_queue=70024, util=98.42%
0.20user 0.38system 0:21.50elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
432008inputs+181968outputs (0major+2454minor)pagefaults 0swaps