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On Mon, 2014-01-27 at 14:58 +0000, Robert Li (baoli) wrote:
> Hi Folks,
> 
> 
> In today's meeting, we discussed a scheduler issue for SRIOV. The
> basic requirement is for coexistence of the following compute nodes in
> a cloud:
>       -- SRIOV only compute nodes
>       -- non-SRIOV only compute nodes
>       -- Compute nodes that can support both SRIOV and non-SRIOV
> ports. Lack of a proper name, let's call them compute nodes with
> hybrid NICs support, or simply hybrid compute nodes.
> 
> 
> I'm not sure if it's practical in having hybrid compute nodes in a
> real cloud. But it may be useful in the lab to bench mark the
> performance differences between SRIOV, non-SRIOV, and coexistence of
> both.
> 
> 
> In a cloud that supports SRIOV in some of the compute nodes, a request
> such as:
> 
> 
>      nova boot —flavor m1.large —image <image-uuid> --nic
> net-id=<net-uuid> vm
> 
> 
> doesn't require a SRIOV port. However, it's possible for the nova
> scheduler to place it on a compute node that supports sriov port only.
> Since neutron plugin runs on the controller, port-create would succeed
> unless neutron knows the host doesn't support non-sriov port. But
> connectivity on the node would not be established since no agent is
> running on that host to establish such connectivity. 
> 
> 
> Irena brought up the idea of using host aggregate. This requires
> creation of a non-SRIOV host aggregate, and use that in the above
> 'nova boot' command. It should work.
> 
> 
> The patch I had introduced a new constraint in the existing PCI
> passthrough filter. 
> 
> 
> The consensus seems to be having a better solution in a later release.
> And for now, people can either use host aggregate or resort to their
> own means.
> 
> 
> Let's keep the discussion going on this. 
> 
> 
> Thanks,
> Robert
> 
> 
>  
> 
> 
> 
> 
> 
> 
> On 1/24/14 4:50 PM, "Robert Li (baoli)" <baoli at cisco.com> wrote:
> 
> 
>         Hi Folks,
>         
>         
>         Based on Thursday's discussion and a chat with Irena, I took
>         the liberty to add a summary and discussion points for SRIOV
>         on Monday and onwards. Check it
>         out https://wiki.openstack.org/wiki/Meetings/Passthrough.
>         Please feel free to update it. Let's try to finalize it next
>         week. The goal is to determine the BPs that need to get
>         approved, and to start coding. 
>         
>         
>         thanks,
>         Robert
>         
>         
>         
>         
>         On 1/22/14 8:03 AM, "Robert Li (baoli)" <baoli at cisco.com>
>         wrote:
>         
>         
>                 Sounds great! Let's do it on Thursday.
>                 
>                 
>                 --Robert
>                 
>                 
>                 On 1/22/14 12:46 AM, "Irena Berezovsky"
>                 <irenab at mellanox.com> wrote:
>                 
>                 
>                         Hi Robert, all,
>                         
>                         I would suggest not to delay the SR-IOV
>                         discussion to the next week.
>                         
>                         Let’s try to cover the SRIOV side and
>                         especially the nova-neutron interaction points
>                         and interfaces this Thursday.
>                         
>                         Once we have the interaction points well
>                         defined, we can run parallel patches to cover
>                         the full story.
>                         
>                          
>                         
>                         Thanks a lot,
>                         
>                         Irena 
>                         
>                          
>                         
>                         From: Robert Li (baoli)
>                         [mailto:baoli at cisco.com] 
>                         Sent: Wednesday, January 22, 2014 12:02 AM
>                         To: OpenStack Development Mailing List (not
>                         for usage questions)
>                         Subject: [openstack-dev] [nova][neutron] PCI
>                         passthrough SRIOV
>                         
>                         
>                          
>                         
>                         Hi Folks,
>                         
>                         
>                          
>                         
>                         
>                         As the debate about PCI flavor versus host
>                         aggregate goes on, I'd like to move forward
>                         with the SRIOV side of things in the same
>                         time. I know that tomorrow's IRC will be
>                         focusing on the BP review, and it may well
>                         continue into Thursday. Therefore, let's start
>                         discussing SRIOV side of things on Monday. 
>                         
>                         
>                          
>                         
>                         
>                         Basically, we need to work out the details on:
>                         
>                         
>                                 -- regardless it's PCI flavor or host
>                         aggregate or something else, how to use it to
>                         specify a SRIOV port. 
>                         
>                         
>                                 -- new parameters for —nic
>                         
>                         
>                                 -- new parameters for neutron
>                         net-create/neutron port-create
>                         
>                         
>                                 -- interface between nova and neutron
>                         
>                         
>                                 -- nova side of work
>                         
>                         
>                                 -- neutron side of work
>                         
>                         
>                          
>                         
>                         
>                         We should start coding ASAP.
>                         
>                         
>                          
>                         
>                         
>                         Thanks,
>                         
>                         
>                         Robert
>                         
>                         
>                          
>                         
>                         
>                          
>                         
>                         
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I noticed that you discussed that prefer non-SRIOV compute node to SRIOV
compute node. I think that should be achieved through weight?

Thanks
--jyh