This page (revision-40) was last changed on 23-Apr-2022 17:06 by Harry Metske

This page was created on 23-Apr-2022 17:05 by Harry Metske

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Version Date Modified Size Author Changes ... Change note
40 23-Apr-2022 17:06 41 KB Harry Metske to previous
39 23-Apr-2022 17:05 41 KB Harry Metske to previous | to last
38 23-Apr-2022 17:05 40 KB Harry Metske to previous | to last --biosbootmenu disabled, not more than one cpu
37 23-Apr-2022 17:05 38 KB Harry Metske to previous | to last
36 23-Apr-2022 17:05 37 KB Harry Metske to previous | to last
35 23-Apr-2022 17:05 37 KB Harry Metske to previous | to last
34 23-Apr-2022 17:05 37 KB Harry Metske to previous | to last
33 23-Apr-2022 17:05 37 KB Harry Metske to previous | to last
32 23-Apr-2022 17:05 37 KB Harry Metske to previous | to last
31 23-Apr-2022 17:05 36 KB Harry Metske to previous | to last
30 23-Apr-2022 17:05 35 KB Harry Metske to previous | to last
29 23-Apr-2022 17:05 35 KB Harry Metske to previous | to last
28 23-Apr-2022 17:05 35 KB Harry Metske to previous | to last guest properties
27 23-Apr-2022 17:05 33 KB Harry Metske to previous | to last
26 23-Apr-2022 17:05 32 KB Harry Metske to previous | to last
25 23-Apr-2022 17:05 32 KB Harry Metske to previous | to last
24 23-Apr-2022 17:05 31 KB Harry Metske to previous | to last
23 23-Apr-2022 17:05 30 KB Harry Metske to previous | to last
22 23-Apr-2022 17:05 30 KB Harry Metske to previous | to last
21 23-Apr-2022 17:05 29 KB Harry Metske to previous | to last cpu affinity

Page References

Incoming links Outgoing links
VirtualBox
VirtualBox

Version management

Difference between version and

At line 8 removed 2 lines
%%warning A new report on [VirtualBox-4.1] is also available %%
At line 644 removed one line
* removing /etc/udev/rules.d/70-persistent-net.rules (or you get eth1 in use instead of eth0 on the cloned guest)
At line 694 changed one line
VBoxManage modifyvm ubm$N --biosbootmenu disabled --memory 64 --vram 6 --boot1 disk --hda HardDisks/ubm${N}disk.vdi --nic1 bridged --bridgeadapter1 wlan0 --vrdp on --vrdpport $VRDPPORT
VBoxManage modifyvm ubm$N --memory 64 --vram 6 --boot1 disk --hda HardDisks/ubm${N}disk.vdi --nic1 bridged --bridgeadapter1 wlan0 --vrdp on --vrdpport $VRDPPORT
At line 784 removed 15 lines
* what irritated me is that the output of the VBoxManage command is always cluttered with Sun advertisement :
{{{
VirtualBox Command Line Management Interface Version 3.0.10
(C) 2005-2009 Sun Microsystems, Inc.
All rights reserved.
}}}
also the long command name VBoxManage with two capitals in it is not quick to type, so I got rid of that by create this one line script :
{{{
VBoxManage $* |grep -v 'VirtualBox Command Line Management Interface Version' | grep -v 'Sun Microsystems, Inc.' | grep -v 'All rights reserved'
}}}
* you cannot assign more than one CPU, if you do it looks like it needs hw-virt, in VirtualBox gui you cannot even select more than one cpu, with the commandline you can, but it won't boot (even if ''--hwvirtex off'' has been set) :
{{{
Error: failed to start machine. Error message: VT-x is not available. (VERR_VMX_NO_VMX).
Unknown error creating VM (VERR_VMX_NO_VMX)
}}}
At line 819 removed 118 lines
!! Performance
! tar -czvf
I wanted to get an idea of much overhead there is, so comparing running a load on native hardware against running under VirtualBox.\\
Now you do a complete study on this subject, but no time for that.
I did just one very simple test :
{{{
metskem@ubm7:/tmp$ time tar -czf /tmp/ff.tar /usr/*
tar: Removing leading `/' from member names
tar: Removing leading `/' from hard link targets
real 1m20.259s
user 0m27.586s
sys 0m27.286s
}}}
Then scp this tar file to the host, untar it to a temp directory and tar it again in the same way :
{{{
metskem@gneisenau /tmp/fff $ time tar -czf /tmp/ffnative.tar usr
real 0m29.273s
user 0m26.282s
sys 0m1.284s
}}}
||type||host ||guest
|real|29|80
|user|26|28
|sys|1|27
This is rather disappointing, I like to do some testing with a Java workload....
! ant compile jspwiki
{{{
metskem@ubm7:~/jspwiki$ time ant clean compile
Buildfile: build.xml
clean:
[delete] Deleting directory /home/metskem/jspwiki/build
[mkdir] Created dir: /home/metskem/jspwiki/build/tests/classpath
init:
[mkdir] Created dir: /home/metskem/jspwiki/build/classes
compile:
[javac] Compiling 431 source files to /home/metskem/jspwiki/build/classes
[javac] Note: Some input files use or override a deprecated API.
[javac] Note: Recompile with -Xlint:deprecation for details.
[javac] Note: Some input files use unchecked or unsafe operations.
[javac] Note: Recompile with -Xlint:unchecked for details.
BUILD SUCCESSFUL
Total time: 15 seconds
real 0m16.701s
user 0m3.372s
sys 0m7.512s
}}}
{{{
metskem@gneisenau /tmp/fff/jspwiki $ time ant clean compile
Buildfile: build.xml
clean:
[delete] Deleting directory /tmp/fff/jspwiki/build
[mkdir] Created dir: /tmp/fff/jspwiki/build/tests/classpath
init:
[mkdir] Created dir: /tmp/fff/jspwiki/build/classes
compile:
[javac] Compiling 431 source files to /tmp/fff/jspwiki/build/classes
[javac] Note: Some input files use or override a deprecated API.
[javac] Note: Recompile with -Xlint:deprecation for details.
[javac] Note: Some input files use unchecked or unsafe operations.
[javac] Note: Recompile with -Xlint:unchecked for details.
BUILD SUCCESSFUL
Total time: 10 seconds
real 0m10.653s
user 0m17.541s
sys 0m0.744s
}}}
||type||host (taskset -c 1)||host ||guest (taskset -c 1)||guest
|real|17|11|17|20
|user|16|18|3|4
|sys|1|1|8|9
This is a strange result, the host takes 18 user seconds versus 3 user seconds in the guest, for the host the wall-clock time is less than the sum of user and sys (2 cores, that's why ?), ............Yes indeed, that's why :
{{{
metskem@gneisenau /tmp/fff/jspwiki $ time taskset -c 1 ant clean compile
Buildfile: build.xml
clean:
[delete] Deleting directory /tmp/fff/jspwiki/build
[mkdir] Created dir: /tmp/fff/jspwiki/build/tests/classpath
init:
[mkdir] Created dir: /tmp/fff/jspwiki/build/classes
compile:
[javac] Compiling 431 source files to /tmp/fff/jspwiki/build/classes
[javac] Note: Some input files use or override a deprecated API.
[javac] Note: Recompile with -Xlint:deprecation for details.
[javac] Note: Some input files use unchecked or unsafe operations.
[javac] Note: Recompile with -Xlint:unchecked for details.
BUILD SUCCESSFUL
Total time: 16 seconds
real 0m16.766s
user 0m15.897s
sys 0m0.816s
}}}
This page (revision-40) was last changed on 23-Apr-2022 17:06 by Harry MetskeTop