[ovs-discuss] [ovs-dev] OVS DPDK NUMA pmd assignment question for physical port

[Darrell Ball]

Adding Billy and Kevin


On 9/6/17, 12:22 AM, "Darrell Ball" <dball at vmware.com> wrote:

    
    
    On 9/6/17, 12:03 AM, "王志克" <wangzhike at jd.com> wrote:
    
        Hi Darrell,
        
        pmd-rxq-affinity has below limitation: (so isolated pmd can not be used for others, which is not my expectation. Lots of VMs come and go on the fly, and manully assignment is not feasible.)
                  >>After that PMD threads on cores where RX queues was pinned will become isolated. This means that this thread will poll only pinned RX queues
        
        My problem is that I have several CPUs spreading on different NUMA nodes. I hope all these CPU can have chance to serve the rxq. However, because the phy NIC only locates on one certain socket node, non-same numa pmd/CPU would be excluded. So I am wondering whether we can have different behavior for phy port rxq: 
              round-robin to all PMDs even the pmd on different NUMA socket.
        
        I guess this is a common case, and I believe it would improve rx performance.
    
    
    [Darrell] I agree it would be a common problem and some distribution would seem to make sense, maybe factoring in some favoring of local numa PMDs ?
                    Maybe an optional config to enable ?
                      
        
        Br,
        Wang Zhike