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] [12.5% done] [ 18006/  4262 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [ 15489/  4702 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [21.7% done] [ 12060/  9107 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [25.0% done] [ 14919/  3892 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [ 12934/  4193 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [  7854/  9017 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [34.6% done] [ 12023/  5141 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [ 10673/  6263 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [ 11995/  3363 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [ 13703/  1956 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  7484/  5836 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [ 10872/  2684 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  9017/  2957 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  8663/  2060 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  6804/  3042 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  8822/   752 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [65.5% done] [  5600/  2908 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5761, got signal=6
Threads: 2: [_mm] [64.5% done] [  3392/  2818 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5762, got signal=6
Threads: 1: [__V] [72.4% done] [ 12588/   272 kb/s] [eta 00m:08s]
fio: (groupid=0): err= 0: pid=5761
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.0%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.0%, 20=2.0%, 50=5.8%, 100=54.4%
     lat (msec): 250=36.9%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=5762
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.5%, 8=95.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.3%, 50=9.0%, 100=37.9%
     lat (msec): 250=51.9%, 500=0.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=5763
  read : io=100MiB, bw=4,745KiB/s, runt= 22004msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  815, avg=79.18, stdev=52.49
    bw (KiB/s) : min=  105, max=19664, per=46.00%, avg=5301.47, stdev=3997.09
  write: io=22,340KiB, bw=1,098KiB/s, runt= 20827msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   27, max= 1075, avg=131.13, stdev=129.25
    bw (KiB/s) : min=    0, max= 6907, per=60.04%, avg=2398.64, stdev=2577.04
  cpu          : usr=0.15%, sys=0.53%, ctx=7385
  IO depths    : 1=0.3%, 2=0.6%, 4=11.3%, 8=87.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.5%, 10=1.1%, 20=6.0%, 50=18.6%, 100=39.0%
     lat (msec): 250=33.6%, 500=0.2%, 750=0.1%, 1000=0.2%, >=2000=0.2%

Run status group 0 (all jobs):
   READ: io=242MiB, aggrb=11,524KiB/s, minb=0KiB/s, maxb=4,745KiB/s, mint=22004msec, maxt=22004msec
  WRITE: io=81,256KiB, aggrb=3,995KiB/s, minb=0KiB/s, maxb=1,098KiB/s, mint=22004msec, maxt=22004msec

Disk stats (read/write):
  cciss!c0d0: ios=4609/1658, merge=671/61, ticks=52620/24380, in_queue=76992, util=99.22%
0.18user 0.63system 0:22.50elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
495752inputs+162648outputs (0major+2437minor)pagefaults 0swaps