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] [ 15709/  5416 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [18.2% done] [ 18726/  3404 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 18547/  2879 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [ 11523/  7081 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 16436/  3693 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [ 13512/  3591 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 11519/  5531 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 13634/  2070 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [ 16160/     0 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [ 15082/     0 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 10242/  3066 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  4893/  7638 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  8346/  4396 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  3510/  6186 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5218/  3742 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6748/  2375 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 3: [mmm] [63.3% done] [  7842/   629 kb/s] [eta 00m:11s]
fio: pid=28564, got signal=6
Threads: 2: [mm_] [64.5% done] [  4856/  1565 kb/s] [eta 00m:11s]
Threads: 2: [mV_] [65.6% done] [ 15294/   349 kb/s] [eta 00m:11s]
Threads: 1: [m__] [66.7% done] [ 11816/  1639 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28562, got signal=6

fio: (groupid=0): err= 0: pid=28562
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.8%, 8=93.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=2.1%, 50=8.2%, 100=41.1%
     lat (msec): 250=45.6%, 500=1.6%, 750=0.8%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28563
  read : io=100MiB, bw=4,802KiB/s, runt= 21748msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  558, avg=76.08, stdev=48.49
    bw (KiB/s) : min=    7, max=17955, per=42.70%, avg=5086.62, stdev=3982.32
  write: io=25,296KiB, bw=1,283KiB/s, runt= 20175msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   31, max=  209, avg=105.89, stdev=32.44
    bw (KiB/s) : min=    0, max= 7654, per=61.84%, avg=2479.07, stdev=2488.12
  cpu          : usr=0.44%, sys=0.48%, ctx=7503
  IO depths    : 1=0.1%, 2=0.8%, 4=13.0%, 8=86.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.3%, 10=2.4%, 20=4.8%, 50=18.6%, 100=40.6%
     lat (msec): 250=32.1%, 500=0.4%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28564
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.1%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.0%, 50=10.3%, 100=45.1%
     lat (msec): 250=42.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=247MiB, aggrb=11,913KiB/s, minb=0KiB/s, maxb=4,802KiB/s, mint=0msec, maxt=21748msec
  WRITE: io=78,988KiB, aggrb=4,009KiB/s, minb=0KiB/s, maxb=1,283KiB/s, mint=0msec, maxt=21748msec

Disk stats (read/write):
  cciss!c0d0: ios=4716/1752, merge=693/162, ticks=54232/28968, in_queue=83192, util=98.42%
0.29user 0.58system 0:22.82elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
506552inputs+158016outputs (0major+2443minor)pagefaults 0swaps