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] [11.5% done] [ 18735/  2371 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [16.7% done] [  9183/ 11121 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 15977/  5088 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [  7154/ 11018 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [  9806/  8566 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 18210/   703 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 12015/  5137 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 17262/   581 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  6971/  7516 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  9046/  6349 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 11353/  3405 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  5328/  6963 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  5560/  5950 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  6113/  5515 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  9858/  1373 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6729/  3035 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18782, got signal=6
Threads: 2: [mm_] [63.3% done] [  6642/  1435 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18780, got signal=6
Threads: 1: [_m_] [66.7% done] [  6113/  2253 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18781, got signal=6

fio: (groupid=0): err= 0: pid=18780
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.5%, 8=93.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.2%, 10=0.3%, 20=2.7%, 50=8.0%, 100=46.6%
     lat (msec): 250=41.0%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=18781
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=7.4%, 8=92.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.4%, 10=0.2%, 20=2.6%, 50=10.3%, 100=34.1%
     lat (msec): 250=50.6%, 500=1.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=18782
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.2%, 8=93.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.7%, 50=9.0%, 100=43.1%
     lat (msec): 250=46.8%, 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=3901/2014, merge=620/94, ticks=45340/31844, in_queue=77180, util=98.38%
0.53user 0.54system 0:20.93elapsed 5%CPU (0avgtext+0avgdata 0maxresident)k
409200inputs+205144outputs (0major+2456minor)pagefaults 0swaps