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] [13.0% done] [ 11185/ 10185 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 16087/  4441 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [20.8% done] [ 11116/  7939 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 13012/  5788 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [ 14480/  4673 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [30.8% done] [ 17819/     0 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [34.6% done] [ 16262/  2523 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [ 14354/  1793 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.7% done] [  9175/  4717 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [44.4% done] [  6581/  7049 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [  9457/  3611 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 12422/   683 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  8305/  3376 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  4376/  6552 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  6227/  3254 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.1% done] [  6988/  1948 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25675, got signal=6
Threads: 2: [m_m] [63.3% done] [  3221/  4218 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25676, got signal=6
Threads: 1: [m__] [64.5% done] [  7354/   711 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25674, got signal=6

fio: (groupid=0): err= 0: pid=25674
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=7.2%, 8=92.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.4%, 20=3.9%, 50=11.9%, 100=34.2%
     lat (msec): 250=48.0%, 500=1.0%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25675
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.0%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.0%, 20=1.6%, 50=8.5%, 100=56.2%
     lat (msec): 250=33.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25676
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.8%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.2%, 10=0.1%, 20=2.0%, 50=6.2%, 100=54.7%
     lat (msec): 250=35.5%, 500=0.4%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3927/1822, merge=568/168, ticks=45724/25964, in_queue=71680, util=98.88%
0.26user 0.31system 0:20.93elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
430624inputs+183952outputs (0major+2450minor)pagefaults 0swaps