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] [ 12170/  9229 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 12902/  7183 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 11491/  6794 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 16152/  3876 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [  7712/  8135 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [  5180/ 11398 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 15761/  1846 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 11315/  5385 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  7066/  6440 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [  6882/  7862 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [ 13178/  1106 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 12853/     0 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [ 11539/   996 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  5800/  4413 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  7374/  2395 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  5782/  3462 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4837, got signal=6
Threads: 2: [m_m] [61.3% done] [  5568/  1191 kb/s] [eta 00m:12s]
Threads: 2: [m_m] [62.5% done] [  5397/  2460 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4838, got signal=6
Threads: 1: [m__] [65.6% done] [  6068/   951 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4836, got signal=6

fio: (groupid=0): err= 0: pid=4836
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.0%, 8=94.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.6%, 50=13.9%, 100=36.1%
     lat (msec): 250=46.7%, 500=0.7%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4837
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.3%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.4%, 50=8.4%, 100=59.9%
     lat (msec): 250=30.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4838
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.2%, 8=93.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=1.3%, 50=13.0%, 100=39.0%
     lat (msec): 250=45.2%, 500=0.6%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4237/1933, merge=784/227, ticks=51524/29892, in_queue=81412, util=98.99%
0.20user 0.52system 0:22.32elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
432736inputs+181136outputs (0major+2452minor)pagefaults 0swaps