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] [ 14415/  6739 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [16.7% done] [ 11197/  9538 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [  8956/ 11722 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 16758/  3014 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 16477/  1523 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 10783/  6154 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 12739/  5422 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [  7976/  7793 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 14098/  3274 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  9932/  4071 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 12910/  1956 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  8350/  3046 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [ 10217/  1594 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  4710/  5356 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  9542/   736 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6593/  1574 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3367, got signal=6
Threads: 2: [m_m] [63.3% done] [  5958/  2192 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3368, got signal=6
Threads: 1: [m__] [64.5% done] [  8232/     0 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3366, got signal=6

fio: (groupid=0): err= 0: pid=3366
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.1%, 8=92.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=3.1%, 50=11.7%, 100=40.1%
     lat (msec): 250=43.5%, 500=1.0%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3367
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.5%, 8=93.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.1%, 20=1.0%, 50=11.9%, 100=45.2%
     lat (msec): 250=41.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3368
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.9%, 8=92.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.1%, 20=1.4%, 50=10.8%, 100=44.0%
     lat (msec): 250=42.5%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4149/1877, merge=697/125, ticks=46088/29380, in_queue=75460, util=99.37%
0.18user 0.35system 0:21.00elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
414624inputs+199632outputs (0major+2453minor)pagefaults 0swaps