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] [ 17408/  4124 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 10914/  8899 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [20.8% done] [ 16896/  1761 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 17428/  1349 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 11394/  6213 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [ 11649/  5885 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [34.6% done] [ 10343/  5519 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [  8415/  8314 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [ 12861/  3538 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  7842/  6497 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  9626/  4173 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  7886/  4067 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  8464/  2172 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  7642/  4218 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [ 10461/   707 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  2725/  6235 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13857, got signal=6
Threads: 2: [_mm] [61.3% done] [  7663/   637 kb/s] [eta 00m:12s]
Threads: 2: [_mm] [64.5% done] [  6007/  1781 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13858, got signal=6
Threads: 1: [__m] [67.7% done] [  7764/     0 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13859, got signal=6

fio: (groupid=0): err= 0: pid=13857
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.2%, 8=94.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.0%, 50=9.3%, 100=49.7%
     lat (msec): 250=39.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13858
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.1%, 8=93.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.4%, 20=1.6%, 50=11.0%, 100=42.2%
     lat (msec): 250=43.8%, 500=0.4%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13859
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.9%, 8=93.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=1.4%, 50=11.3%, 100=37.4%
     lat (msec): 250=48.3%, 500=0.9%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4215/1886, merge=514/171, ticks=50492/29948, in_queue=80436, util=98.26%
0.19user 0.53system 0:21.69elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
445544inputs+168664outputs (0major+2451minor)pagefaults 0swaps