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= Install = | Notes from virtualization test day [[Test_Day:2009-05-07_Virtualization]] | ||
specifically for [[Test_Day:2009-05-07_Virtualization:XenDomU]]. | |||
= Xen DomU = | |||
== Install == | |||
Worked for | Worked for | ||
* dom0 2.6.21.7-5.fc8xen #1 SMP Thu Aug 7 12:44:22 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux | * dom0 2.6.21.7-5.fc8xen #1 SMP Thu Aug 7 12:44:22 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux | ||
| Line 7: | Line 11: | ||
** domU 64b works | ** domU 64b works | ||
= Memory Ballooning = | == Memory Ballooning == | ||
== 32 bit guest == | === 32 bit guest === | ||
=== Balloon Up - fail? === | Original guest was 1G. Test was: | ||
<pre> | |||
virsh shutdown f11 | |||
virsh dumpxml f11 > f11.xml | |||
</pre> | |||
* Add currentMemory parameter which defines minimum memory given to guest at boot. | |||
<pre> | |||
<memory>1048576</memory> | |||
<currentMemory>524288</currentMemory> | |||
</pre> | |||
* Enact this guest config in Xen via libvirt. | |||
<pre> | |||
virsh define f11.xml | |||
virsh start f11 | |||
</pre> | |||
See: [[QA_talk:Testcase_Virtualization_XenDomU_Memory_Ballooning]] | |||
==== Balloon Up - fail? ==== | |||
<pre> | <pre> | ||
[root@felix tmp]# grep -i memory f11-32.xml | [root@felix tmp]# grep -i memory f11-32.xml | ||
| Line 28: | Line 49: | ||
After few minutes guest <code>free -m</code> still reports 519. | After few minutes guest <code>free -m</code> still reports 519. | ||
=== Balloon Down - PASS === | ==== Balloon Down - PASS ==== | ||
<pre> | <pre> | ||
[root@felix tmp]# virsh setmem f11-32 $(( 1024 * 256 )) | [root@felix tmp]# virsh setmem f11-32 $(( 1024 * 256 )) | ||
| Line 41: | Line 62: | ||
Guest <code>free -m</code> reports 256. | Guest <code>free -m</code> reports 256. | ||
=== Balloon Back Up - PASS === | ==== Balloon Back Up - PASS ==== | ||
Apparently I'm mistaken in my understanding of <code><memory></code> and <code><currentMemory></code> tags. | Apparently I'm mistaken in my understanding of <code><memory></code> and <code><currentMemory></code> tags. | ||
I was not able to balloon above 519. | I was not able to balloon above 519. | ||
Latest revision as of 07:03, 7 May 2009
Notes from virtualization test day Test_Day:2009-05-07_Virtualization specifically for Test_Day:2009-05-07_Virtualization:XenDomU.
Xen DomU
Install
Worked for
- dom0 2.6.21.7-5.fc8xen #1 SMP Thu Aug 7 12:44:22 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux
- AMD Opteron(tm) Processor 848
- flags: fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext lm 3dnowext 3dnow up
- domU 32b works
- domU 64b works
Memory Ballooning
32 bit guest
Original guest was 1G. Test was:
virsh shutdown f11 virsh dumpxml f11 > f11.xml
- Add currentMemory parameter which defines minimum memory given to guest at boot.
<memory>1048576</memory> <currentMemory>524288</currentMemory>
- Enact this guest config in Xen via libvirt.
virsh define f11.xml virsh start f11
See: QA_talk:Testcase_Virtualization_XenDomU_Memory_Ballooning
Balloon Up - fail?
[root@felix tmp]# grep -i memory f11-32.xml <memory>1048576</memory> <currentMemory>524288</currentMemory> # guest is running... [root@felix xen]# virsh setmem f11-32 $(( 1024 * 1000 )) [root@felix tmp]# grep 'memory target' /var/log/xen/xend.log |tail -1 [2009-05-06 23:24:23 28390] DEBUG (XendDomainInfo:664) Setting memory target of domain f11-32 (7) to 1000 MiB. [root@felix xen]# virsh dominfo f11-32 | grep memory Max memory: 1048576 kB Used memory: 524288 kB
After few minutes guest free -m still reports 519.
Balloon Down - PASS
[root@felix tmp]# virsh setmem f11-32 $(( 1024 * 256 )) [root@felix tmp]# grep 'memory target' /var/log/xen/xend.log |tail -1 [2009-05-06 23:36:08 28390] DEBUG (XendDomainInfo:664) Setting memory target of domain f11-32 (7) to 256 MiB. [root@felix tmp]# virsh dominfo f11-32|grep memory Max memory: 1048576 kB Used memory: 262144 kB
Guest free -m reports 256.
Balloon Back Up - PASS
Apparently I'm mistaken in my understanding of <memory> and <currentMemory> tags.
I was not able to balloon above 519.
[root@felix tmp]# virsh setmem f11-32 $(( 1024 * 1000 )) [root@felix tmp]# grep 'memory target' /var/log/xen/xend.log |tail -1 [2009-05-06 23:40:04 28390] DEBUG (XendDomainInfo:664) Setting memory target of domain f11-32 (7) to 1000 MiB. [root@felix tmp]# virsh dominfo f11-32|grep memory Max memory: 1048576 kB Used memory: 524288 kB
Guest free -m reports 519 again.