search for: config_rp

...e.h index 5c88ab1..71b8bc4 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -668,15 +668,28 @@ extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, u16 filter_id); #endif +#endif /* CONFIG_RPS */ /* This structure contains an instance of an RX queue. */ struct netdev_rx_queue { +#ifdef CONFIG_RPS struct rps_map __rcu *rps_map; struct rps_dev_flow_table __rcu *rps_flow_table; +#endif struct kobject kobj; struct net_device *dev; } ____cacheline_aligned_in_smp; -#endif /*...

...e.h index 5c88ab1..38929bc 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -668,15 +668,28 @@ extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, u16 filter_id); #endif +#endif /* CONFIG_RPS */ /* This structure contains an instance of an RX queue. */ struct netdev_rx_queue { +#ifdef CONFIG_RPS struct rps_map __rcu *rps_map; struct rps_dev_flow_table __rcu *rps_flow_table; +#endif struct kobject kobj; struct net_device *dev; } ____cacheline_aligned_in_smp; -#endif /*...

skb_page_frag_refill currently permits only order-0 page allocs unless GFP_WAIT is used. Change skb_page_frag_refill to attempt higher-order page allocations whether or not GFP_WAIT is used. If memory cannot be allocated, the allocator will fall back to successively smaller page allocs (down to order-0 page allocs). This change brings skb_page_frag_refill in line with the existing page allocation

skb_page_frag_refill currently permits only order-0 page allocs unless GFP_WAIT is used. Change skb_page_frag_refill to attempt higher-order page allocations whether or not GFP_WAIT is used. If memory cannot be allocated, the allocator will fall back to successively smaller page allocs (down to order-0 page allocs). This change brings skb_page_frag_refill in line with the existing page allocation

The virtio-net device currently uses aligned MTU-sized mergeable receive packet buffers. Network throughput for workloads with large average packet size can be improved by posting larger receive packet buffers. However, due to SKB truesize effects, posting large (e.g, PAGE_SIZE) buffers reduces the throughput of workloads that do not benefit from GRO and have no large inbound packets. This

The virtio-net device currently uses aligned MTU-sized mergeable receive packet buffers. Network throughput for workloads with large average packet size can be improved by posting larger receive packet buffers. However, due to SKB truesize effects, posting large (e.g, PAGE_SIZE) buffers reduces the throughput of workloads that do not benefit from GRO and have no large inbound packets. This

The virtio-net device currently uses aligned MTU-sized mergeable receive packet buffers. Network throughput for workloads with large average packet size can be improved by posting larger receive packet buffers. However, due to SKB truesize effects, posting large (e.g, PAGE_SIZE) buffers reduces the throughput of workloads that do not benefit from GRO and have no large inbound packets. This

The virtio-net device currently uses aligned MTU-sized mergeable receive packet buffers. Network throughput for workloads with large average packet size can be improved by posting larger receive packet buffers. However, due to SKB truesize effects, posting large (e.g, PAGE_SIZE) buffers reduces the throughput of workloads that do not benefit from GRO and have no large inbound packets. This

skb_page_frag_refill currently permits only order-0 page allocs unless GFP_WAIT is used. Change skb_page_frag_refill to attempt higher-order page allocations whether or not GFP_WAIT is used. If memory cannot be allocated, the allocator will fall back to successively smaller page allocs (down to order-0 page allocs). This change brings skb_page_frag_refill in line with the existing page allocation

skb_page_frag_refill currently permits only order-0 page allocs unless GFP_WAIT is used. Change skb_page_frag_refill to attempt higher-order page allocations whether or not GFP_WAIT is used. If memory cannot be allocated, the allocator will fall back to successively smaller page allocs (down to order-0 page allocs). This change brings skb_page_frag_refill in line with the existing page allocation

...an get to the > > struct net_device from the netdev_rx_queue. If we extended > > netdev_rx_queue to indicate the queue_index or to store a void *priv_data > > pointer, that would be sufficient to allow us to resolve this issue. > > Hmm netdev_rx_queue is not defined unless CONFIG_RPS is set. > Maybe we should use a different structure. [...] I don't think RPS should own this structure. It's just that there are currently no per-RX-queue attributes other than those defined by RPS. By the way, CONFIG_RPS is equivalent to CONFIG_SMP so will likely be enabled already...

...an get to the > > struct net_device from the netdev_rx_queue. If we extended > > netdev_rx_queue to indicate the queue_index or to store a void *priv_data > > pointer, that would be sufficient to allow us to resolve this issue. > > Hmm netdev_rx_queue is not defined unless CONFIG_RPS is set. > Maybe we should use a different structure. [...] I don't think RPS should own this structure. It's just that there are currently no per-RX-queue attributes other than those defined by RPS. By the way, CONFIG_RPS is equivalent to CONFIG_SMP so will likely be enabled already...

Hi Michael, On Sun, Jan 12, 2014 at 9:09 AM, Michael S. Tsirkin <mst at redhat.com> wrote: > Can't we add struct attribute * to netdevice, and pass that in when > creating the kobj? I like that idea, I think that will work and should be better than the alternatives. The actual kobjs for RX queues (struct netdev_rx_queue) are allocated and deallocated by calls to

Hi Michael, On Sun, Jan 12, 2014 at 9:09 AM, Michael S. Tsirkin <mst at redhat.com> wrote: > Can't we add struct attribute * to netdevice, and pass that in when > creating the kobj? I like that idea, I think that will work and should be better than the alternatives. The actual kobjs for RX queues (struct netdev_rx_queue) are allocated and deallocated by calls to

...to be used only by RPS, AFAICT it seems RPS should not own netdev_rx_queue but rather should own the RPS-specific fields themselves within netdev_rx_queue. If there are no objections, it seems like I could modify netdev_rx_queue and related functionality so that their existence does not depend on CONFIG_RPS, and instead just have CONFIG_RPS control whether or not the RPS-specific attributes/fields are present. Best, Mike

...he attribute itself. We can get to the > struct net_device from the netdev_rx_queue. If we extended > netdev_rx_queue to indicate the queue_index or to store a void *priv_data > pointer, that would be sufficient to allow us to resolve this issue. Hmm netdev_rx_queue is not defined unless CONFIG_RPS is set. Maybe we should use a different structure. > Please let me know if the above sounds good or if you see a better way > to accomplish this goal. Thanks! > > Best, > > Mike Sounds good to me.

...# CONFIG_IEEE802154 is not set # CONFIG_NET_SCHED is not set # CONFIG_DCB is not set # CONFIG_BATMAN_ADV is not set # CONFIG_OPENVSWITCH is not set # CONFIG_VSOCKETS is not set # CONFIG_NETLINK_MMAP is not set # CONFIG_NETLINK_DIAG is not set # CONFIG_NET_MPLS_GSO is not set # CONFIG_HSR is not set CONFIG_RPS=y CONFIG_RFS_ACCEL=y CONFIG_XPS=y # CONFIG_NETPRIO_CGROUP is not set CONFIG_NET_RX_BUSY_POLL=y CONFIG_BQL=y # CONFIG_BPF_JIT is not set CONFIG_NET_FLOW_LIMIT=y # # Network testing # # CONFIG_NET_PKTGEN is not set # CONFIG_NET_TCPPROBE is not set # CONFIG_HAMRADIO is not set # CONFIG_CAN is not se...

...# CONFIG_IEEE802154 is not set # CONFIG_NET_SCHED is not set # CONFIG_DCB is not set # CONFIG_BATMAN_ADV is not set # CONFIG_OPENVSWITCH is not set # CONFIG_VSOCKETS is not set # CONFIG_NETLINK_MMAP is not set # CONFIG_NETLINK_DIAG is not set # CONFIG_NET_MPLS_GSO is not set # CONFIG_HSR is not set CONFIG_RPS=y CONFIG_RFS_ACCEL=y CONFIG_XPS=y # CONFIG_NETPRIO_CGROUP is not set CONFIG_NET_RX_BUSY_POLL=y CONFIG_BQL=y # CONFIG_BPF_JIT is not set CONFIG_NET_FLOW_LIMIT=y # # Network testing # # CONFIG_NET_PKTGEN is not set # CONFIG_NET_TCPPROBE is not set # CONFIG_HAMRADIO is not set # CONFIG_CAN is not se...

Setting the IF flag can cause an VM exit. So we should avoid touching the IF flag until absolutely necessary. This patch change the way the paravirt arch_local_irq_restore() works by checking the previous flags value and call arch_local_irq_enable() only if the IF flag was set previously. On a 32 vCPUs KVM guest running the AIM7 five-sec workload, the performance increased slightly from 302136.32

Setting the IF flag can cause an VM exit. So we should avoid touching the IF flag until absolutely necessary. This patch change the way the paravirt arch_local_irq_restore() works by checking the previous flags value and call arch_local_irq_enable() only if the IF flag was set previously. On a 32 vCPUs KVM guest running the AIM7 five-sec workload, the performance increased slightly from 302136.32