On 07/01/2015 12:23 AM, ChangBo Guo wrote:
thanks Dan and Jay, we don't need add new scheduler for that :-), what about provide cpu frequency to api /os-hypervisors, that means we can report this value automatically, the value can be used in high level mange tools.
Meh, I'm not too big of a fan of the os-hypervisors extension. Actually, one might say I despise that extension :)
That said, I suppose it should be possible to include the output of the CPU frequency in the cpu_info field there...
-jay
2015-07-01 2:58 GMT+08:00 Jay Pipes <jaypi...@gmail.com <mailto:jaypi...@gmail.com>>: On 06/30/2015 02:42 AM, ChangBo Guo wrote: CPU frequency is an import performance parameter, currently nova drivers just report cpu_info without frequency. we stored the compute node cpu_info in database with colum compute_nodes.cpu_info, we can add the frequency easily. The usage of cpu frequency I can think is used to schedule to meet applications which need high frequency. add a frequency based filter ? if we need this , I would like to propose a spec for this . There are two steps to leverage cpu frequency: 1. report cpu frequency and record the value, nova hypervisor-show will include the value . 2. filter compute nodes based cpu frequency. add a new scheduler filter to do that before I start to do these stuff. I would like to your input . Do we need leverage CPU frequency in Nova ? if yes, do we need a new filter or leverage existing filter to use frequency ? Like Dan B, I question whether CPU frequency really is a useful metric for scheduling decisions. That said, it is already possible to use CPU frequency in the MetricsWeigher scheduler weigher. The compute monitor plugin system is currently being overhauled [1], but the functionality to monitor CPU-related metrics already exists in Nova and can be enabled by doing the following in your nova-compute nova.conf: compute_monitors = ComputeDriverCPUMonitor Note that with the refactoring of the monitoring plugin interface, the above option will change due to using stevedore to load monitor extensions: compute_monitors = nova.compute.monitors.cpu.virt_driver:Monitor In your Nova scheduler nova.conf, you will need to add the following in the [metrics] section of the file: weights_setting = cpu.frequency=10.0 Again, I'm not saying that the above will result in any appreciable enhancement to the scheduler's decision-making, but it will do what you're trying to accomplish :) Best, -jay [1] https://review.openstack.org/#/q/status:open+project:openstack/nova+branch:master+topic:bug/1468012,n,z __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe <http://openstack-dev-requ...@lists.openstack.org?subject:unsubscribe> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- ChangBo Guo(gcb) __________________________________________________________________________ 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
