Re: [openstack-dev] [nova] Extra feature of vCPU allocation on demands
On 05/07/2018 05:55 AM, 倪蔚辰 wrote: Hi, all I would like to propose a blueprint (not proposed yet), which is related to openstack nova. I hope to have some comments by explaining my idea through this e-mail. Please contact me if anyone has any comment. Background Under current OpenStack, vCPUs assigned to each VM can be configured as dedicated or shared. In some scenarios, such as deploying Radio Access Network VNF, the VM is required to have dedicated vCPUs to insure the performance. However, in that case, each VM has a vCPU to do Guest OS housekeeping. Usually, this vCPU is not a high performance required vCPU and do not take high percentage of dedicated vCPU utilization. There is some vCPU resources waste. Proposed feature I hope to add an extra feature to flavor extra specs. It refers to how many dedicated vCPUs and how many shared vCPUs are needed for the VM. When VM requires vCPU, OpenStack allocates vCPUs on demands. In the background scenario, this idea can save many dedicated vCPUs which take Guest OS housekeeping. And the scenario stated above is only one use case for the feature. This feature potentially allows user to have more flexible VM design to save CPU resource. Please see here: https://review.openstack.org/#/c/555081/ Best, -jay __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [nova] Extra feature of vCPU allocation on demands
I will be interested to watch this develop. In PowerVM we already have shared vs. dedicated processors [1] along with concepts like capped vs. uncapped, min/max proc units, weights, etc. But obviously it's all heavily customized to be PowerVM-specific. If these concepts made their way into mainstream Nova, we could hopefully adapt to use them and remove some tech debt. [1] https://github.com/openstack/nova/blob/master/nova/virt/powervm/vm.py#L372-L401 On 05/07/2018 04:55 AM, 倪蔚辰 wrote: > Hi, all > > I would like to propose a blueprint (not proposed yet), which is related > to openstack nova. I hope to have some comments by explaining my idea > through this e-mail. Please contact me if anyone has any comment. > > > > Background > > Under current OpenStack, vCPUs assigned to each VM can be configured as > dedicated or shared. In some scenarios, such as deploying Radio Access > Network VNF, the VM is required to have dedicated vCPUs to insure the > performance. However, in that case, each VM has a vCPU to do Guest OS > housekeeping. Usually, this vCPU is not a high performance required vCPU > and do not take high percentage of dedicated vCPU utilization. There is > some vCPU resources waste. > > > > Proposed feature > > I hope to add an extra feature to flavor extra specs. It refers to how > many dedicated vCPUs and how many shared vCPUs are needed for the VM. > When VM requires vCPU, OpenStack allocates vCPUs on demands. In the > background scenario, this idea can save many dedicated vCPUs which take > Guest OS housekeeping. And the scenario stated above is only one use > case for the feature. This feature potentially allows user to have more > flexible VM design to save CPU resource. > > > > Thanks. > > > > Weichen > > e-mail: niweic...@chinamobile.com > > > > > > __ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
[openstack-dev] [nova] Extra feature of vCPU allocation on demands
Hi, all I would like to propose a blueprint (not proposed yet), which is related to openstack nova. I hope to have some comments by explaining my idea through this e-mail. Please contact me if anyone has any comment. Background Under current OpenStack, vCPUs assigned to each VM can be configured as dedicated or shared. In some scenarios, such as deploying Radio Access Network VNF, the VM is required to have dedicated vCPUs to insure the performance. However, in that case, each VM has a vCPU to do Guest OS housekeeping. Usually, this vCPU is not a high performance required vCPU and do not take high percentage of dedicated vCPU utilization. There is some vCPU resources waste. Proposed feature I hope to add an extra feature to flavor extra specs. It refers to how many dedicated vCPUs and how many shared vCPUs are needed for the VM. When VM requires vCPU, OpenStack allocates vCPUs on demands. In the background scenario, this idea can save many dedicated vCPUs which take Guest OS housekeeping. And the scenario stated above is only one use case for the feature. This feature potentially allows user to have more flexible VM design to save CPU resource. Thanks. Weichen e-mail: niweic...@chinamobile.com __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
