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] [13.6% done] [  9797/ 12609 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [19.0% done] [ 13321/  9217 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [22.7% done] [ 13414/  6874 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [  8159/ 10296 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [  8440/  8566 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [  8716/  8955 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [  8915/  7659 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  9233/  8521 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 11275/  4348 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 15041/  1134 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  9106/  3941 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  6188/  6493 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  6833/  4356 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  8273/  1657 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5775/  3066 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4234, got signal=6
Threads: 2: [mm_] [62.1% done] [  7594/   768 kb/s] [eta 00m:11s]
Threads: 2: [mm_] [63.3% done] [  5371/  2397 kb/s] [eta 00m:11s]
Threads: 2: [mm_] [64.5% done] [   780/  4323 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4232, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4233, got signal=6

fio: (groupid=0): err= 0: pid=4232
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=3.7%, 8=96.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.0%, 50=11.2%, 100=43.4%
     lat (msec): 250=44.3%, 500=0.2%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4233
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.8%, 8=94.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.0%, 50=10.6%, 100=31.6%
     lat (msec): 250=54.9%, 500=1.0%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4234
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.8%, 8=93.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.7%, 50=9.7%, 100=57.8%
     lat (msec): 250=30.3%, 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=3320/2358, merge=588/241, ticks=38268/35356, in_queue=73616, util=99.17%
0.20user 0.38system 0:21.45elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
364576inputs+249520outputs (0major+2454minor)pagefaults 0swaps