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TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet, Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc.
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 2 ‱Network Function Virtualization ‱I/O Virtualization Mechanisms ‱Vhost-net Details ‱NFV with virtio −Issues −Workaround ‱Proposed Architecture
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 3 Network Function Virtualization
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 4 ‱Dynamic network service launch restricted by existing hardware −Increased capital investment ‱New infrastructure = Increased power requirement −Increased cost of energy ‱Shorter procure-design-integrate-deploy cycle due to rapidly evolving hardware −Shorter hardware lifecycles
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 5 ‱Allows for dynamic network service launch −Reduces time for deploying new network services ‱Same infrastructure can be used/shared for hosting multiple services −Reduced capital investment −Reduced cost of energy ‱Offers Agility and Flexibility −Quickly scale up or down services based on the demand −Reduces time to deploy new networking services
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 6 ‱NetworkFunctions −DataplaneandControlplane: Firewall,VPN,UTMetc. ‱Virtualization −HypervisormanagedVMs ‱IT virtualization technology to consolidate network equipment . OS Network Function Network Function Network Function hardware OS OS Hypervisor
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 7 VM1 VM2 VM3 VM4 Hypervisor Switch Server Network Appliance NFVM1 NFVM2 NFVM3 NFVM4 Switch Hypervisor Pkt VM1 NFVM VM3 VM4 Hypervisor Switch Server Pkt Pkt Shared NIC Shared NIC Shared NIC Pkt Pkt Pkt Pkt Pkt
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 8 I/O Virtualization Mechanisms
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 9 Guest OS Hypervisor (Full Virtualization) Traps Device Emulation Guest OS Hypervisor (ParaVirtualization) Interfaces Device Emulation Para-drivers Hardware Hardware
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 10 Guest OS Front end drivers Back end Drivers Device Emulation HV (Para) Virtio virtqueues
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 11 â–șEach guest sees a private VirtIOnetwork device on PCI bus â–șVirtIOnetwork driver is needed in guest â–șStandard tun/tap interface is used by QEMU to bridge to host network stack â–șBackend driver in QEMU Partition 1 App QEMU Partition 2 OS App OS App QEMU Linux Kernel / KVM tun/tap eth0 Hardware Bridge
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 12 Vhost-net is a module in Linux Kernel. Transfers buffers between host and guest. Bypasses QEMU for virtqueue operations Partition 1 App QEMU Partition 2 OS App OS App QEMU tun/tap Hardware eth0 Bridge vhost Linux Kernel / KVM
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 13 Vhost-net Details
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 14 Guest VNIC vhostthread TX vq RX vq Linux Kernel/KVM Tap Bridge Ethernet Driver NIC
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 15 QEMU vhost_dev_ioctl kthread_create User Space ioctl This thread is responsible for handling both Rx and Txjobs for a vhostdevice A worker thread is created per vhostinstance Kernel Space
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 16 RX Packet Flow
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 17 START Hardware Interrupt Interrupt Handler irq_exit napi_schedule Other Routines raise_softirq_irqoff other routines do_softirq netif_receive_skb net_rx_action dpaa_eth_poll qman_p_poll_dqrr priv_rx_default_dqrr A Hardirq Softirq
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 18 br_handle_frame A br_handle_frame_finish br_forward dev_hard_start_xmit tun_net_xmit skb_queue_tail br_dev_queue_push_xmit dev_queue_xmit wakeup_poll This is going to wake up tun_chr_poll Bridge Handling of skb Softirq Tunreceives the skband queues it
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 19 START Work dequeued kthread_should_stop False False list_empty True True need_ schedule schedule True Return False RX processing
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 20 sock_recvmsg() calls tun_recvmsg handle_rx() sock_len Socket refers to tap socket Poll Updated used list tun_do_read() Copy Packet True Return False True Return False vhost_worker() Total bytes received >= VhostBudget False
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 21 A Free Rx Buffer > size/2 try_fill_rcv try_fill_rcv schedule_delayed refill_work Done. Added empty buffers received < budget napi_complete
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 22 TX Packet Flow
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 23 Traffic from Guest OS Virtio-net Driver Write Descin Available Ring Ring_Full Report Congestion
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 24 iowrite16 start_xmit() virtqueue_kick() virtqueue_notify() virtqueue_kick_prepare False Return True kvm_io_bus_write
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 25 NFV with VirtIO
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 26 Shared NIC Shared NIC VM1 VM2 VM3 VM4 Hypervisor Switch Server Network Appliance NFVM1 NFVM2 NFVM3 NFVM4 Switch Hypervisor Pkt Pkt Pkt Pkt Packet Flooding Packet Drop
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 27
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 28 NIC driver Bridge Tap 1 2 
 500 Tap Queue Full Packets keep on dropping at tap level Physical NIC NAPI processing Packet Flooding VhostThread Fails to Schedule due to lower Priority than SoftIRQ Ingress Rate
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 29
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 30 Congestion Send Buffer to Bridge/Tap False True NAPI Handler Disable HWI Vhost_Rx Rx Ring < Lower Watermark Process Pkt Enable HWI NAPI SoftIRQProcessing VhostRx Processing
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 31 NIC driver Bridge Tap 1 2 
 Last index Now Tap Queue Full Physical NIC Packet gets queued Congestion Notification sent to bridge Packet Drop at HW last index Packet Flooding Bridge stops forwarding NIC driver Disable HWI VhostThread Now Vhostcan schedule during packet flooding.
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 32 0 100 200 300 400 500 600 700 800 900 1000 0 500 1000 1500 2000 2500 egress Rate Ingress Rate Current Design Modified Design
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 33
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 34 ‱Dynamic vhostthread controlled NIC driver instance. ‱Vhostthread registers with NIC driver: −Rx Function handle −Buffer depletion handler ‱Driver provides following during registration to Vhost: −TxFunction Handler −Buffer pool management handle
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 35 VhostThread New Network Acceleration Interface Driver Ethernet Port Rx FQ/BD Ring TxFQ/BD Ring PCD block Rx Ring TxRing GUEST VNET1 KVM VhostInitialization Register for Driver Instantiation BD Ring Creation, Buffer Pool Creation Fill TxHandler, Buffer Pool Management handler and Return Buffer Pool
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 36 VhostThread New Network Acceleration Interface Driver Ethernet Port Rx FQ/BD Ring PCD block Rx Ring TxRing GUEST VNET1 KVM Rx Tx No Rx Buffers Left in Buffer Pool Buffer Pool Buffer Acquire Failure Packet Dropped at HW Buffers Seeded by Vhost Buffers available in Buffer Pool Buffer Acquire Succeed Packet DMAedto buffer and Sent to Rx Ring Pkt Buffer Acquire Requested
TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 37 ‱Vhost-net interfaces can get saturated at high traffic rates ‱No mechanism to communicate Vhost-net interface saturation information to host ‱With a more integrated guest/host Virtioinfrastructure, it’s possible to avoid system saturation and increase throughput ‱Hardware acceleration can be leveraged for Vhostnet interfaces
TM

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Hardware accelerated virtio networking for nfv linux con

  • 1. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet, Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc.
  • 2. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 2 ‱Network Function Virtualization ‱I/O Virtualization Mechanisms ‱Vhost-net Details ‱NFV with virtio −Issues −Workaround ‱Proposed Architecture
  • 3. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 3 Network Function Virtualization
  • 4. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 4 ‱Dynamic network service launch restricted by existing hardware −Increased capital investment ‱New infrastructure = Increased power requirement −Increased cost of energy ‱Shorter procure-design-integrate-deploy cycle due to rapidly evolving hardware −Shorter hardware lifecycles
  • 5. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 5 ‱Allows for dynamic network service launch −Reduces time for deploying new network services ‱Same infrastructure can be used/shared for hosting multiple services −Reduced capital investment −Reduced cost of energy ‱Offers Agility and Flexibility −Quickly scale up or down services based on the demand −Reduces time to deploy new networking services
  • 6. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 6 ‱NetworkFunctions −DataplaneandControlplane: Firewall,VPN,UTMetc. ‱Virtualization −HypervisormanagedVMs ‱IT virtualization technology to consolidate network equipment . OS Network Function Network Function Network Function hardware OS OS Hypervisor
  • 7. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 7 VM1 VM2 VM3 VM4 Hypervisor Switch Server Network Appliance NFVM1 NFVM2 NFVM3 NFVM4 Switch Hypervisor Pkt VM1 NFVM VM3 VM4 Hypervisor Switch Server Pkt Pkt Shared NIC Shared NIC Shared NIC Pkt Pkt Pkt Pkt Pkt
  • 8. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 8 I/O Virtualization Mechanisms
  • 9. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 9 Guest OS Hypervisor (Full Virtualization) Traps Device Emulation Guest OS Hypervisor (ParaVirtualization) Interfaces Device Emulation Para-drivers Hardware Hardware
  • 10. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 10 Guest OS Front end drivers Back end Drivers Device Emulation HV (Para) Virtio virtqueues
  • 11. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 11 â–șEach guest sees a private VirtIOnetwork device on PCI bus â–șVirtIOnetwork driver is needed in guest â–șStandard tun/tap interface is used by QEMU to bridge to host network stack â–șBackend driver in QEMU Partition 1 App QEMU Partition 2 OS App OS App QEMU Linux Kernel / KVM tun/tap eth0 Hardware Bridge
  • 12. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 12 Vhost-net is a module in Linux Kernel. Transfers buffers between host and guest. Bypasses QEMU for virtqueue operations Partition 1 App QEMU Partition 2 OS App OS App QEMU tun/tap Hardware eth0 Bridge vhost Linux Kernel / KVM
  • 13. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 13 Vhost-net Details
  • 14. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 14 Guest VNIC vhostthread TX vq RX vq Linux Kernel/KVM Tap Bridge Ethernet Driver NIC
  • 15. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 15 QEMU vhost_dev_ioctl kthread_create User Space ioctl This thread is responsible for handling both Rx and Txjobs for a vhostdevice A worker thread is created per vhostinstance Kernel Space
  • 16. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 16 RX Packet Flow
  • 17. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 17 START Hardware Interrupt Interrupt Handler irq_exit napi_schedule Other Routines raise_softirq_irqoff other routines do_softirq netif_receive_skb net_rx_action dpaa_eth_poll qman_p_poll_dqrr priv_rx_default_dqrr A Hardirq Softirq
  • 18. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 18 br_handle_frame A br_handle_frame_finish br_forward dev_hard_start_xmit tun_net_xmit skb_queue_tail br_dev_queue_push_xmit dev_queue_xmit wakeup_poll This is going to wake up tun_chr_poll Bridge Handling of skb Softirq Tunreceives the skband queues it
  • 19. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 19 START Work dequeued kthread_should_stop False False list_empty True True need_ schedule schedule True Return False RX processing
  • 20. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 20 sock_recvmsg() calls tun_recvmsg handle_rx() sock_len Socket refers to tap socket Poll Updated used list tun_do_read() Copy Packet True Return False True Return False vhost_worker() Total bytes received >= VhostBudget False
  • 21. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 21 A Free Rx Buffer > size/2 try_fill_rcv try_fill_rcv schedule_delayed refill_work Done. Added empty buffers received < budget napi_complete
  • 22. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 22 TX Packet Flow
  • 23. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 23 Traffic from Guest OS Virtio-net Driver Write Descin Available Ring Ring_Full Report Congestion
  • 24. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 24 iowrite16 start_xmit() virtqueue_kick() virtqueue_notify() virtqueue_kick_prepare False Return True kvm_io_bus_write
  • 25. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 25 NFV with VirtIO
  • 26. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 26 Shared NIC Shared NIC VM1 VM2 VM3 VM4 Hypervisor Switch Server Network Appliance NFVM1 NFVM2 NFVM3 NFVM4 Switch Hypervisor Pkt Pkt Pkt Pkt Packet Flooding Packet Drop
  • 27. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 27
  • 28. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 28 NIC driver Bridge Tap 1 2 
 500 Tap Queue Full Packets keep on dropping at tap level Physical NIC NAPI processing Packet Flooding VhostThread Fails to Schedule due to lower Priority than SoftIRQ Ingress Rate
  • 29. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 29
  • 30. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 30 Congestion Send Buffer to Bridge/Tap False True NAPI Handler Disable HWI Vhost_Rx Rx Ring < Lower Watermark Process Pkt Enable HWI NAPI SoftIRQProcessing VhostRx Processing
  • 31. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 31 NIC driver Bridge Tap 1 2 
 Last index Now Tap Queue Full Physical NIC Packet gets queued Congestion Notification sent to bridge Packet Drop at HW last index Packet Flooding Bridge stops forwarding NIC driver Disable HWI VhostThread Now Vhostcan schedule during packet flooding.
  • 32. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 32 0 100 200 300 400 500 600 700 800 900 1000 0 500 1000 1500 2000 2500 egress Rate Ingress Rate Current Design Modified Design
  • 33. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 33
  • 34. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 34 ‱Dynamic vhostthread controlled NIC driver instance. ‱Vhostthread registers with NIC driver: −Rx Function handle −Buffer depletion handler ‱Driver provides following during registration to Vhost: −TxFunction Handler −Buffer pool management handle
  • 35. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 35 VhostThread New Network Acceleration Interface Driver Ethernet Port Rx FQ/BD Ring TxFQ/BD Ring PCD block Rx Ring TxRing GUEST VNET1 KVM VhostInitialization Register for Driver Instantiation BD Ring Creation, Buffer Pool Creation Fill TxHandler, Buffer Pool Management handler and Return Buffer Pool
  • 36. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 36 VhostThread New Network Acceleration Interface Driver Ethernet Port Rx FQ/BD Ring PCD block Rx Ring TxRing GUEST VNET1 KVM Rx Tx No Rx Buffers Left in Buffer Pool Buffer Pool Buffer Acquire Failure Packet Dropped at HW Buffers Seeded by Vhost Buffers available in Buffer Pool Buffer Acquire Succeed Packet DMAedto buffer and Sent to Rx Ring Pkt Buffer Acquire Requested
  • 37. TM Freescale, the Freescale logo, AltiVec, C-5, CodeTEST, CodeWarrior, ColdFire, C-Ware, the Energy Efficient Solutions logo, mobileGT, PowerQUICC, QorIQ, StarCore and Symphony are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. BeeKit, BeeStack, ColdFire+, CoreNet,Flexis, Kinetis, MXC, Platform in a Package, Processor Expert, QorIQ Qonverge, Qorivva, QUICC Engine, SMARTMOS, TurboLink, VortiQa and Xtrinsic are trademarks ofFreescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2014 Freescale Semiconductor, Inc. 37 ‱Vhost-net interfaces can get saturated at high traffic rates ‱No mechanism to communicate Vhost-net interface saturation information to host ‱With a more integrated guest/host Virtioinfrastructure, it’s possible to avoid system saturation and increase throughput ‱Hardware acceleration can be leveraged for Vhostnet interfaces
  • 38. TM