tech mailinglists
2013-Feb-06 13:54 UTC
PV or HVM guest for OpenBuildServices Host (OpenSUSE based)
Hello all, I don''t know if it is a silly question but I am really unsure. I informed myself about the OpenBuildService project which was initialized by OpenSUSE. Now I am really interested in setting up an OpenBuildService VM where I can package some programs and so on for example own software and software I wan''t to use on a few systems which have for example newer versions not in there offical repository actually. I think that OpenBuildService gives a more or less universal environment and secure build environment. I thought about which guest type I should use. I am not that familiar with for example compiler optimization algorithms and so I asked my self the question would it be better to build up an PV or an HVM OpenSUSE DomU. What would be better? Does it matter if it is a PV or HVM guest for compiler optimazations and so on? Would be great when someone could give me an answer. Best Regards _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users
Nick Couchman
2013-Feb-06 20:44 UTC
Re: PV or HVM guest for OpenBuildServices Host (OpenSUSE based)
I would go with PV - in fact, I use a PV guest for an OBS host that I have here at my location. I only use HVM for systems that absolutely will not boot PV (Windows, mainly). -Nick>>> On 2013/02/06 at 06:54, tech mailinglists <mailinglists.tech@gmail.com> wrote:> Hello all, > > I don''t know if it is a silly question but I am really unsure. I informed > myself about the OpenBuildService project which was initialized by OpenSUSE. > > Now I am really interested in setting up an OpenBuildService VM where I can > package some programs and so on for example own software and software I > wan''t to use on a few systems which have for example newer versions not in > there offical repository actually. I think that OpenBuildService gives a > more or less universal environment and secure build environment. > > I thought about which guest type I should use. I am not that familiar with > for example compiler optimization algorithms and so I asked my self the > question would it be better to build up an PV or an HVM OpenSUSE DomU. What > would be better? Does it matter if it is a PV or HVM guest for compiler > optimazations and so on? > > Would be great when someone could give me an answer. > > Best Regards-------- This e-mail may contain confidential and privileged material for the sole use of the intended recipient. If this email is not intended for you, or you are not responsible for the delivery of this message to the intended recipient, please note that this message may contain SEAKR Engineering (SEAKR) Privileged/Proprietary Information. In such a case, you are strictly prohibited from downloading, photocopying, distributing or otherwise using this message, its contents or attachments in any way. If you have received this message in error, please notify us immediately by replying to this e-mail and delete the message from your mailbox. Information contained in this message that does not relate to the business of SEAKR is neither endorsed by nor attributable to SEAKR.
<J.Witvliet@mindef.nl>
2013-Feb-07 10:33 UTC
Re: PV or HVM guest for OpenBuildServices Host (OpenSUSE based)
From: xen-users-bounces@lists.xen.org [mailto:xen-users-bounces@lists.xen.org] On Behalf Of tech mailinglists Sent: Wednesday, February 06, 2013 2:55 PM To: xen-users Subject: [Xen-users] PV or HVM guest for OpenBuildServices Host (OpenSUSE based) Hello all, I don''t know if it is a silly question but I am really unsure. I informed myself about the OpenBuildService project which was initialized by OpenSUSE. Now I am really interested in setting up an OpenBuildService VM where I can package some programs and so on for example own software and software I wan''t to use on a few systems which have for example newer versions not in there offical repository actually. I think that OpenBuildService gives a more or less universal environment and secure build environment. I thought about which guest type I should use. I am not that familiar with for example compiler optimization algorithms and so I asked my self the question would it be better to build up an PV or an HVM OpenSUSE DomU. What would be better? Does it matter if it is a PV or HVM guest for compiler optimazations and so on? Would be great when someone could give me an answer. Best Regards Hi, Disregarding the purpose of the machine, HVM comes at a costs. Sometimes it is unavoidable, if the OS (like *bsd) requires it, but otherwise: use PV. There are some drivers to lessen the pain, but PV remains almost the fastest way for virtualization/isolation. HW ______________________________________________________________________ Dit bericht kan informatie bevatten die niet voor u is bestemd. Indien u niet de geadresseerde bent of dit bericht abusievelijk aan u is toegezonden, wordt u verzocht dat aan de afzender te melden en het bericht te verwijderen. De Staat aanvaardt geen aansprakelijkheid voor schade, van welke aard ook, die verband houdt met risico''s verbonden aan het elektronisch verzenden van berichten. This message may contain information that is not intended for you. If you are not the addressee or if this message was sent to you by mistake, you are requested to inform the sender and delete the message. The State accepts no liability for damage of any kind resulting from the risks inherent in the electronic transmission of messages. _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users
tech mailinglists
2013-Feb-07 11:39 UTC
Re: PV or HVM guest for OpenBuildServices Host (OpenSUSE based)
Paravitualization is very great so I would prefer it but the things I tought was whether there are differences for compilers aspecially for languages like C/C++ in the case of HVM and PV. I think for a managed code codebase it would be unimportant where it get builds. I think that a few tests are needed to find out whether there are differences for build process in HVM mode and PV mode. Best Regards 2013/2/7 <J.Witvliet@mindef.nl>> ** ** > > *From:* xen-users-bounces@lists.xen.org [mailto: > xen-users-bounces@lists.xen.org] *On Behalf Of *tech mailinglists > *Sent:* Wednesday, February 06, 2013 2:55 PM > *To:* xen-users > *Subject:* [Xen-users] PV or HVM guest for OpenBuildServices Host > (OpenSUSE based)**** > > ** ** > > Hello all, > > I don''t know if it is a silly question but I am really unsure. I informed > myself about the OpenBuildService project which was initialized by OpenSUSE. > **** > > Now I am really interested in setting up an OpenBuildService VM where I > can package some programs and so on for example own software and software I > wan''t to use on a few systems which have for example newer versions not in > there offical repository actually. I think that OpenBuildService gives a > more or less universal environment and secure build environment.**** > > I thought about which guest type I should use. I am not that familiar with > for example compiler optimization algorithms and so I asked my self the > question would it be better to build up an PV or an HVM OpenSUSE DomU. What > would be better? Does it matter if it is a PV or HVM guest for compiler > optimazations and so on?**** > > Would be great when someone could give me an answer.**** > > Best Regards**** > > ** ** > > ** ** > > Hi,**** > > ** ** > > Disregarding the purpose of the machine, HVM comes at a costs.**** > > Sometimes it is unavoidable, if the OS (like *bsd) requires it, but > otherwise: use PV.**** > > There are some drivers to lessen the pain, but PV remains almost the > fastest way for virtualization/isolation.**** > > ** ** > > HW**** > > ** ** > > ** ** > ------------------------------ > Dit bericht kan informatie bevatten die niet voor u is bestemd. Indien u > niet de geadresseerde bent of dit bericht abusievelijk aan u is > toegezonden, wordt u verzocht dat aan de afzender te melden en het bericht > te verwijderen. De Staat aanvaardt geen aansprakelijkheid voor schade, van > welke aard ook, die verband houdt met risico''s verbonden aan het > elektronisch verzenden van berichten. > > This message may contain information that is not intended for you. If you > are not the addressee or if this message was sent to you by mistake, you > are requested to inform the sender and delete the message. The State > accepts no liability for damage of any kind resulting from the risks > inherent in the electronic transmission of messages. > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xen.org > http://lists.xen.org/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users
Nick Couchman
2013-Feb-07 14:48 UTC
Re: PV or HVM guest for OpenBuildServices Host (OpenSUSE based)
No, there should be no difference in the compiled code out of a PV machine vs. an HVM machine. The difference between PV and HVM is simply how they access the hardware - the results of machine-generated code should not different between the two. -Nick>>> On 2013/02/07 at 04:39, tech mailinglists <mailinglists.tech@gmail.com> wrote:> Paravitualization is very great so I would prefer it but the things I > tought was whether there are differences for compilers aspecially for > languages like C/C++ in the case of HVM and PV. I think for a managed code > codebase it would be unimportant where it get builds. > > I think that a few tests are needed to find out whether there are > differences for build process in HVM mode and PV mode. > > Best Regards > > > 2013/2/7 <J.Witvliet@mindef.nl> > >> ** ** >> >> *From:* xen-users-bounces@lists.xen.org [mailto: >> xen-users-bounces@lists.xen.org] *On Behalf Of *tech mailinglists >> *Sent:* Wednesday, February 06, 2013 2:55 PM >> *To:* xen-users >> *Subject:* [Xen-users] PV or HVM guest for OpenBuildServices Host >> (OpenSUSE based)**** >> >> ** ** >> >> Hello all, >> >> I don''t know if it is a silly question but I am really unsure. I informed >> myself about the OpenBuildService project which was initialized by OpenSUSE. >> **** >> >> Now I am really interested in setting up an OpenBuildService VM where I >> can package some programs and so on for example own software and software I >> wan''t to use on a few systems which have for example newer versions not in >> there offical repository actually. I think that OpenBuildService gives a >> more or less universal environment and secure build environment.**** >> >> I thought about which guest type I should use. I am not that familiar with >> for example compiler optimization algorithms and so I asked my self the >> question would it be better to build up an PV or an HVM OpenSUSE DomU. What >> would be better? Does it matter if it is a PV or HVM guest for compiler >> optimazations and so on?**** >> >> Would be great when someone could give me an answer.**** >> >> Best Regards**** >> >> ** ** >> >> ** ** >> >> Hi,**** >> >> ** ** >> >> Disregarding the purpose of the machine, HVM comes at a costs.**** >> >> Sometimes it is unavoidable, if the OS (like *bsd) requires it, but >> otherwise: use PV.**** >> >> There are some drivers to lessen the pain, but PV remains almost the >> fastest way for virtualization/isolation.**** >> >> ** ** >> >> HW**** >> >> ** ** >> >> ** ** >> ------------------------------ >> Dit bericht kan informatie bevatten die niet voor u is bestemd. Indien u >> niet de geadresseerde bent of dit bericht abusievelijk aan u is >> toegezonden, wordt u verzocht dat aan de afzender te melden en het bericht >> te verwijderen. De Staat aanvaardt geen aansprakelijkheid voor schade, van >> welke aard ook, die verband houdt met risico''s verbonden aan het >> elektronisch verzenden van berichten. >> >> This message may contain information that is not intended for you. If you >> are not the addressee or if this message was sent to you by mistake, you >> are requested to inform the sender and delete the message. The State >> accepts no liability for damage of any kind resulting from the risks >> inherent in the electronic transmission of messages. >> >> _______________________________________________ >> Xen-users mailing list >> Xen-users@lists.xen.org >> http://lists.xen.org/xen-users >>-------- This e-mail may contain confidential and privileged material for the sole use of the intended recipient. If this email is not intended for you, or you are not responsible for the delivery of this message to the intended recipient, please note that this message may contain SEAKR Engineering (SEAKR) Privileged/Proprietary Information. In such a case, you are strictly prohibited from downloading, photocopying, distributing or otherwise using this message, its contents or attachments in any way. If you have received this message in error, please notify us immediately by replying to this e-mail and delete the message from your mailbox. Information contained in this message that does not relate to the business of SEAKR is neither endorsed by nor attributable to SEAKR.