dm-ioband

alephan · 07-05-2011, 10:20 AM

Hello guys,

I'mt trying to test dm-ioband my machine. I managed to compile the patch successfully on a 2.6.36 as the official patch was only for 2.6.32.

Well the problem with now is how to test it.

My current scenario is:

Create 2 iobands and mount them

Code:

echo "0 $(blockdev --getsize /dev/sdb1) ioband /dev/sdb1 1 0 0 none weight 0  :40" | dmsetup create ioband1 && echo "0 $(blockdev --getsize /dev/sdb2) ioband /dev/sdb2 1 0 0 none weight 0  :80" | dmsetup create ioband2 && mkfs.ext3 /dev/mapper/ioband1 && mount /dev/mapper/ioband1 /mnt1 && mkfs.ext3 /dev/mapper/ioband2 && mount /dev/mapper/ioband2 /mnt2

Use fio to test speed and I/Os

Code:

cd /mnt1
fio  --direct=1 --rw=randwrite --bs=4k --size=10m --numjobs=10 --runtime=10 --group_reporting --name=file1&
cd /mnt2
fio  --direct=1 --rw=randwrite --bs=4k --size=10m --numjobs=10 --runtime=10 --group_reporting --name=file2&

Well i don't understand why things don't work as they should.

The results are:

Code:

file1: (g=0): rw=randwrite, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1
...
file2: (g=0): rw=randwrite, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1
fio 1.55
...
file1: (g=0): rw=randwrite, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1
fio 1.55
Starting 10 processes
file2: Laying out IO file(s) (1 file(s) / 10MB)
Starting 10 processes
file1: Laying out IO file(s) (1 file(s) / 10MB)
file2: Laying out IO file(s) (1 file(s) / 10MB)
file2: Laying out IO file(s) (1 file(s) / 10MB)
file2: Laying out IO file(s) (1 file(s) / 10MB)
file2: Laying out IO file(s) (1 file(s) / 10MB)
file2: Laying out IO file(s) (1 file(s) / 10MB)
file1: Laying out IO file(s) (1 file(s) / 10MB)
file1: Laying out IO file(s) (1 file(s) / 10MB)
file2: Laying out IO file(s) (1 file(s) / 10MB)
file1: Laying out IO file(s) (1 file(s) / 10MB)
file2: Laying out IO file(s) (1 file(s) / 10MB)
file2: Laying out IO file(s) (1 file(s) / 10MB)
file2: Laying out IO file(s) (1 file(s) / 10MB)
file1: Laying out IO file(s) (1 file(s) / 10MB)
file1: Laying out IO file(s) (1 file(s) / 10MB)K /s] [0 /0  iops] [eta 49710d:06h:28m:01s]
file1: Laying out IO file(s) (1 file(s) / 10MB)K /s] [0 /0  iops] [eta 49710d:06h:27m:47s]
file1: Laying out IO file(s) (1 file(s) / 10MB)K /s] [0 /0  iops] [eta 49710d:06h:27m:40s]
file1: Laying out IO file(s) (1 file(s) / 10MB)K /s] [0 /0  iops] [eta 49710d:06h:27m:35s]
file1: Laying out IO file(s) (1 file(s) / 10MB)K /s] [0 /0  iops] [eta 49710d:06h:26m:44s]
Jobs: 10 (f=10): [wwwwwwwwww] [60.0% done] [0K/0K /s] [0 /0  iops] [eta 00m:04s]        s]
file2: (groupid=0, jobs=10): err= 0: pid=524
  write: io=40960 B, bw=424 B/s, iops=0 , runt= 96508msec
    clat (usec): min=92884K, max=96506K, avg=96427419.48, stdev= 0.00
     lat (usec): min=92884K, max=96506K, avg=96427422.48, stdev= 0.00
    bw (KB/s) : min=    0, max=    0, per=nan%, avg= 0.00, stdev= 0.00
  cpu          : usr=0.00%, sys=0.00%, ctx=16, majf=0, minf=307
  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 r/w/d: total=0/10/0, short=0/0/0

     lat (msec): >=2000=100.00%

Run status group 0 (all jobs):
  WRITE: io=40KB, aggrb=0KB/s, minb=0KB/s, maxb=0KB/s, mint=96508msec, maxt=96508msec

Disk stats (read/write):
  dm-1: ios=1/23107, merge=0/0, ticks=1580/24842300, in_queue=24836720, util=100.00%, aggrios=2/1851, aggrmerge=0/41514, aggrticks=1300/811220, aggrin_queue=812430, aggrutil=100.00%
    sdb: ios=2/1851, merge=0/41514, ticks=1300/811220, in_queue=812430, util=100.00%
Jobs: 2 (f=2): [________ww] [13.7% done] [0K/16K /s] [0 /3  iops] [eta 01m:28s]         s]
file1: (groupid=0, jobs=10): err= 0: pid=534
  write: io=40960 B, bw=3023 B/s, iops=0 , runt= 13545msec
    clat (usec): min=11008K, max=13543K, avg=13505616.44, stdev= 0.00
     lat (usec): min=11008K, max=13543K, avg=13505620.37, stdev= 0.00
    bw (KB/s) : min=    0, max=    0, per=0.00%, avg= 0.00, stdev= 0.00
  cpu          : usr=0.00%, sys=0.06%, ctx=20, majf=0, minf=303
  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 r/w/d: total=0/10/0, short=0/0/0

     lat (msec): >=2000=100.00%

Run status group 0 (all jobs):
  WRITE: io=40KB, aggrb=2KB/s, minb=3KB/s, maxb=3KB/s, mint=13545msec, maxt=13545msec

Disk stats (read/write):
  dm-0: ios=1/23122, merge=0/0, ticks=200/30848620, in_queue=30769510, util=100.00%, aggrios=2/1916, aggrmerge=0/43317, aggrticks=1300/816520, aggrin_queue=816730, aggrutil=100.00%
    sdb: ios=2/1916, merge=0/43317, ticks=1300/816520, in_queue=816730, util=100.00%

400 B vs 3000??? How come?

alephan · 07-21-2011, 07:44 AM

Nada?

bluewhale009 · 08-22-2011, 07:58 AM

i wanted to use dm-ioband on kernel-2.6.38, how do i handle this?
please help me in details,such as, what package and the order