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] [12.0% done] [ 16944/  3933 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [16.0% done] [ 15623/  5779 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [20.0% done] [  8383/ 11214 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [25.0% done] [ 19410/  1854 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [  9013/ 10120 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [  8407/  8460 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 14275/  3665 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [38.5% done] [  8122/  6552 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [  7402/  7309 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  8224/  7162 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [ 11104/  3213 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 10693/  2928 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  6939/  4063 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  9379/  1960 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.6% done] [  9111/  1647 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  5352/  3001 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=6172, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=6173, got signal=6
Threads: 1: [__m] [61.3% done] [  5625/  1077 kb/s] [eta 00m:12s]
Threads: 1: [__m] [64.5% done] [  3542/  3693 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=6174, got signal=6

fio: (groupid=0): err= 0: pid=6172
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.7%, 8=92.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.2%, 20=1.1%, 50=10.2%, 100=52.6%
     lat (msec): 250=35.6%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=6173
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.7%, 8=93.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.0%, 20=0.6%, 50=8.9%, 100=54.7%
     lat (msec): 250=34.6%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=6174
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 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=1.2%, 50=21.6%, 100=22.7%
     lat (msec): 250=53.1%, 500=1.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3797/2084, merge=588/194, ticks=45252/29080, in_queue=74328, util=98.96%
0.22user 0.38system 0:21.14elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
410008inputs+204368outputs (0major+2455minor)pagefaults 0swaps