Comment 8 for bug 1350631

Mixed random reads and writes

fio_test_file: (groupid=0, jobs=16): err= 0: pid=31502: Thu Jul 31 20:35:01 2014
  read : io=1556.8MB, bw=8854.7KB/s, iops=553 , runt=180028msec
    clat (usec): min=298 , max=1826.1K, avg=16447.98, stdev=26927.50
     lat (usec): min=299 , max=1826.1K, avg=16448.84, stdev=26927.50
    clat percentiles (usec):
     | 1.00th=[ 334], 5.00th=[ 382], 10.00th=[ 524], 20.00th=[ 1176],
     | 30.00th=[ 4448], 40.00th=[ 7328], 50.00th=[ 9792], 60.00th=[13120],
     | 70.00th=[17536], 80.00th=[24704], 90.00th=[38656], 95.00th=[54528],
     | 99.00th=[100864], 99.50th=[128512], 99.90th=[272384], 99.95th=[337920],
     | 99.99th=[1236992]
    bw (KB/s) : min= 12, max= 1600, per=6.33%, avg=560.55, stdev=194.36
  write: io=1554.9MB, bw=8844.2KB/s, iops=552 , runt=180028msec
    clat (usec): min=900 , max=1250.2K, avg=12461.58, stdev=23317.58
     lat (usec): min=904 , max=1250.2K, avg=12465.08, stdev=23317.58
    clat percentiles (usec):
     | 1.00th=[ 980], 5.00th=[ 1032], 10.00th=[ 1080], 20.00th=[ 1160],
     | 30.00th=[ 1384], 40.00th=[ 1960], 50.00th=[ 3600], 60.00th=[ 7136],
     | 70.00th=[12352], 80.00th=[19840], 90.00th=[33024], 95.00th=[48896],
     | 99.00th=[94720], 99.50th=[118272], 99.90th=[214016], 99.95th=[292864],
     | 99.99th=[593920]
    bw (KB/s) : min= 12, max= 1615, per=6.34%, avg=560.66, stdev=208.24
    lat (usec) : 500=4.74%, 750=3.62%, 1000=2.43%
    lat (msec) : 2=20.69%, 4=8.44%, 10=18.48%, 20=18.77%, 50=17.43%
    lat (msec) : 100=4.47%, 250=0.84%, 500=0.08%, 750=0.01%, 1000=0.01%
    lat (msec) : 2000=0.01%
  cpu : usr=0.05%, sys=0.18%, ctx=200489, majf=0, minf=425
  IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued : total=r=99630/w=99512/d=0, short=r=0/w=0/d=0

Run status group 0 (all jobs):
   READ: io=1556.8MB, aggrb=8854KB/s, minb=8854KB/s, maxb=8854KB/s, mint=180028msec, maxt=180028msec
  WRITE: io=1554.9MB, aggrb=8844KB/s, minb=8844KB/s, maxb=8844KB/s, mint=180028msec, maxt=180028msec

Disk stats (read/write):
    md0: ios=99623/99537, merge=0/0, ticks=0/0, in_queue=0, util=0.00%, aggrios=24907/24886, aggrmerge=0/0, aggrticks=409488/310160, aggrin_queue=719646, aggrutil=83.27%
  xvdg: ios=22981/23053, merge=0/0, ticks=258421/160461, in_queue=418879, util=65.84%
  xvdh: ios=22914/22916, merge=0/0, ticks=504287/363848, in_queue=868131, util=83.27%
  xvdi: ios=30244/30190, merge=0/0, ticks=417784/236552, in_queue=654331, util=75.43%
  xvdf: ios=23491/23387, merge=0/0, ticks=457463/479781, in_queue=937243, util=83.03%