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] [14.3% done] [ 12153/ 10140 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [18.2% done] [ 13811/  7070 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 10604/  9497 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [ 10018/  8700 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 18291/  1358 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 13933/  3892 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [  8456/  8997 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 11698/  3408 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [ 14517/   764 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  7448/  6030 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  9851/  3640 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  8785/  2806 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  4868/  5786 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  8879/  2078 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  9835/   968 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.0% done] [  8606/   467 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15947, got signal=6
Threads: 2: [_mm] [63.3% done] [  3900/  3164 kb/s] [eta 00m:11s]
Threads: 2: [_mm] [64.5% done] [  2192/  4405 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15948, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15949, got signal=6

fio: (groupid=0): err= 0: pid=15947
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.0%, 8=92.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.2%, 20=1.8%, 50=10.7%, 100=49.5%
     lat (msec): 250=37.1%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15948
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=7.4%, 8=92.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.4%, 20=1.7%, 50=10.5%, 100=41.8%
     lat (msec): 250=44.6%, 500=0.2%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15949
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.4%, 8=93.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.9%, 50=11.4%, 100=38.6%
     lat (msec): 250=45.3%, 500=0.9%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4041/2011, merge=651/138, ticks=47276/31092, in_queue=78360, util=98.99%
0.22user 0.42system 0:21.48elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
415728inputs+198584outputs (0major+2452minor)pagefaults 0swaps