WINDOWS RDMA (ALMOST) EVERYWHERE
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1 14th ANNUAL WORKSHOP 2018 WINDOWS RDMA (ALMOST) EVERYWHERE Omar Cardona Microsoft [ April 2018 ]
2 AGENDA How do we use RDMA? Network Direct Where do we use RDMA? Client, Server, Workstation, etc. Private Cloud, Public Cloud Internals Modes, Aggregation, Port Configs Challenges Silos ECMP/LACP Diagnosis Future Work Secure Multi-Tenant RDMA VFs 2 OpenFabrics Alliance Workshop 2018
3 HOW DO WE USE RDMA? 3 OpenFabrics Alliance Workshop 2018
4 NETWORK DIRECT Kernel Provider Interface ND Kernel Provider Interface NDKPI Enforceable API definition for Kernel Verbs RC only,!qp_modify,!atomics Agnostic of iwarp, RoCE, IB, etc. SMBD or similar NDKCI NDIS NDKPI NicDriver ~OFS Mid-Layer or equivalent NIC Switch 4 OpenFabrics Alliance Workshop 2018
5 NETWORK DIRECT Kernel Provider Interface ND Kernel Provider Interface NDKPI Enforceable API definition for Kernel Verbs RC only,!qp_modify,!atomics Agnostic of iwarp, RoCE, IB, etc. Drivers? Mid-Layer implemented in Drivers Available from all major IHVs SMBD or similar NDKCI NDIS NDKPI NicDriver ~OFS Mid-Layer or equivalent NIC Switch 5 OpenFabrics Alliance Workshop 2018
6 NETWORK DIRECT Kernel Provider Interface ND Kernel Provider Interface NDKPI Enforceable API definition for Kernel Verbs RC only,!qp_modify,!atomics Agnostic of iwarp, RoCE, IB, etc. Drivers? Mid-Layer implemented in Drivers Available from all major IHVs Validation? HLK - HW Logo Kit PCS Private Cloud Stress SMBD or similar NDKCI NDIS NDKPI NicDriver ~OFS Mid-Layer or equivalent NIC Switch In Windows driver model IHVs are free to implement RDMA support and scope via WinOF, Derivation thereof, or custom software. The HLK and PCS validation vehicles are the mechanism by which functionality and support are tested both in Windows labs and IHV labs. 6 OpenFabrics Alliance Workshop 2018
7 NETWORK DIRECT Service Provider Interface ND Service Provider Interface NDSPI Enforceable API definition for User Verbs IB is primary scenario Agnostic of iwarp, RoCE, or IB MSMPI NDSPI NDIS NicDriver ~OFS Mid-Layer or equivalent RDMA Proxy NIC Switch 7 OpenFabrics Alliance Workshop 2018
8 NETWORK DIRECT Service Provider Interface ND Service Provider Interface NDSPI Enforceable API definition for User Verbs IB is primary scenario Agnostic of iwarp, RoCE, or IB Drivers? Separate windows kernel proxy for control path Mid-Layer implemented in Drivers Separate API from NDKPI HPC focused - Limited IHV availability NDIS NicDriver MSMPI NDSPI ~OFS Mid-Layer or equivalent RDMA Proxy NIC Switch 8 OpenFabrics Alliance Workshop 2018
9 WHERE DO WE USE RDMA? 9 OpenFabrics Alliance Workshop 2018
10 PUBLIC CLOUD - PRIVATE CLOUD 10 OpenFabrics Alliance Workshop 2018
11 DISAGGREGATE VS HYPER-CONVERGED RDMA (iwarp or RoCE) Dedicated Fabric 11 OpenFabrics Alliance Workshop 2018
12 DISAGGREGATE VS HYPER-CONVERGED RDMA (iwarp or RoCE) Shared Fabric DCB: PFC/ETS 12 OpenFabrics Alliance Workshop 2018
13 DISAGGREGATE VS HYPER-CONVERGED Data Center Bridging (DCB) VLANs Of course.. Priority Flow Control (PFC) Primarily for RoCE Optional for iwarp Enhanced Transmission Selection (ETS) TX Reservation Requirements 13 OpenFabrics Alliance Workshop 2018
14 DISAGGREGATE VS HYPER-CONVERGED Data Center Bridging (DCB) VLANs Of course.. Priority Flow Control (PFC) Primarily for RoCE Optional for iwarp Enhanced Transmission Selection (ETS) TX Reservation Requirements Is DCB required? RoCE as operational prerequisite iwarp for strict Storage SLAs 14 OpenFabrics Alliance Workshop 2018
15 DISAGGREGATE VS HYPER-CONVERGED 15 OpenFabrics Alliance Workshop 2018
16 CLIENT RDMA Windows 10 Clients 16 OpenFabrics Alliance Workshop 2018
17 CLIENT RDMA Windows Servers 17 OpenFabrics Alliance Workshop 2018
18 CLIENT RDMA WS2012: Server to Server RDMA 18 OpenFabrics Alliance Workshop 2018
19 CLIENT RDMA Windows 10 Clients to WS2016/WS2012 RDMA Server WS2012: Server to Server RDMA 19 OpenFabrics Alliance Workshop 2018
20 CLIENT RDMA Windows 10 Clients to WS2016/WS2012 RDMA Server Very Happy Users! 20 OpenFabrics Alliance Workshop 2018
21 INTERNALS 21 OpenFabrics Alliance Workshop 2018
22 RDMA MODES RDMA RDMA NetVSC NetVSC RDMA L1 Guest vmnic L1 Guest VF vmnic RDMA RDMA Host vnic RDMA Host vnic vswitch VFP vswitch VFP Bare Metal L1 Host L1 Host NIC NIC NIC+IOV Switch Mode 1: Native RDMA Switch Mode 2: vswitch RDMA Switch Mode 3: Trusted IOV/VF RDMA
23 RDMA MODES RDMA RDMA L1 Guest NetVSC VF vmnic Stay Tuned. More details in later slides! RDMA Host vnic L1 Host vswitch VFP NIC+IOV Switch Mode 3: Trusted IOV/VF RDMA
24 SERVER INTERNALS 24 OpenFabrics Alliance Workshop 2018
25 SERVER INTERNALS Deployment Single NIC Dual Port NetVSC NetVSC L1 Guest vmnic L1 Guest vmnic Compartment PA-NIC 1 MGT-NIC Compartment PA-NIC 2 NDK SMB-NIC-1 L1 Host vmswitch VFP NDK SMB-NIC-2 pnic+iov pnic+iov Logical TOR ptor1 ptor2 AGG1 AGG2 25 OpenFabrics Alliance Workshop 2018
26 SERVER INTERNALS Deployment Single NIC Dual Port Switch Independent Teaming/Failover Dynamic Distribution NetVSC NetVSC L1 Guest vmnic L1 Guest vmnic Compartment PA-NIC 1 MGT-NIC Compartment PA-NIC 2 NDK SMB-NIC-1 L1 Host vmswitch VFP NDK SMB-NIC-2 pnic+iov pnic+iov Logical TOR ptor1 ptor2 AGG1 AGG2 26 OpenFabrics Alliance Workshop 2018
27 SERVER INTERNALS Deployment Single NIC Dual Port Switch Independent Teaming/Failover Dynamic Distribution NetVSC NetVSC Hyper-V Port Mode L1 Guest vmnic L1 Guest vmnic Compartment PA-NIC 1 MGT-NIC Compartment PA-NIC 2 NDK SMB-NIC-1 L1 Host vmswitch VFP NDK SMB-NIC-2 pnic+iov pnic+iov Logical TOR ptor1 ptor2 AGG1 AGG2 27 OpenFabrics Alliance Workshop 2018
28 SERVER INTERNALS Deployment Single NIC Dual Port Switch Independent Teaming/Failover Dynamic Distribution NetVSC NetVSC Hyper-V Port Mode L1 Guest vmnic L1 Guest vmnic!lacp More later. Compartment PA-NIC 1 MGT-NIC Compartment PA-NIC 2 NDK SMB-NIC-1 L1 Host vmswitch VFP NDK SMB-NIC-2 pnic+iov pnic+iov Logical TOR ptor1 ptor2 AGG1 AGG2 28 OpenFabrics Alliance Workshop 2018
29 SERVER INTERNALS Deployment Single NIC Dual Port Switch Independent Teaming/Failover Dynamic Distribution NetVSC NetVSC Hyper-V Port Mode L1 Guest vmnic L1 Guest vmnic!lacp More later. / VEB RDMA enabled on PF vports Compartment PA-NIC 1 NDK SMB-NIC-1 L1 Host MGT-NIC vmswitch VFP Compartment PA-NIC 2 NDK SMB-NIC-2 pnic+iov pnic+iov Logical TOR ptor1 ptor2 AGG1 AGG2 29 OpenFabrics Alliance Workshop 2018
30 SERVER INTERNALS Deployment Single NIC Dual Port Switch Independent Teaming/Failover Dynamic Distribution NetVSC NetVSC Hyper-V Port Mode L1 Guest vmnic L1 Guest vmnic!lacp More later. / VEB RDMA enabled on PF vports Converged Ethernet DCB: PFC TC3 RDMA DCB: ETS TC3 50% BW Reservation Tenants (VMs) TC0 Compartment PA-NIC 1 NDK SMB-NIC-1 L1 Host pnic+iov MGT-NIC vmswitch VFP Logical TOR pnic+iov Compartment PA-NIC 2 NDK SMB-NIC-2 ptor1 ptor2 AGG1 AGG2 30 OpenFabrics Alliance Workshop 2018
31 SERVER INTERNALS Deployment Single NIC Dual Port Switch Independent Teaming/Failover Dynamic Distribution NetVSC NetVSC Hyper-V Port Mode L1 Guest vmnic L1 Guest vmnic!lacp More later. / VEB RDMA enabled on PF vports Converged Ethernet DCB: PFC TC3 RDMA DCB: ETS TC3 50% BW Reservation Tenants (VMs) TC0 SMB Multichannel + RDMA Verb Consumer Teaming! Compartment PA-NIC 1 NDK SMB-NIC-1 L1 Host pnic+iov ptor1 MGT-NIC vmswitch VFP Logical TOR pnic+iov ptor2 Compartment PA-NIC 2 NDK SMB-NIC-2 AGG1 AGG2 31 OpenFabrics Alliance Workshop 2018
32 SERVER INTERNALS Deployment Single NIC Dual Port Switch Independent Teaming/Failover Dynamic Distribution NetVSC NetVSC Hyper-V Port Mode L1 Guest vmnic L1 Guest vmnic!lacp More later. / VEB RDMA enabled on PF vports Converged Ethernet DCB: PFC TC3 RDMA DCB: ETS TC3 50% BW Reservation Tenants (VMs) TC0 SMB Multichannel + RDMA Verb Consumer Teaming! Compartment PA-NIC 1 NDK SMB-NIC-1 L1 Host pnic+iov ptor1 MGT-NIC vmswitch VFP Logical TOR pnic+iov ptor2 Compartment PA-NIC 2 NDK SMB-NIC-2 AGG1 AGG2 Very Happy Users! 32 OpenFabrics Alliance Workshop 2018
33 CHALLENGES 33 OpenFabrics Alliance Workshop 2018
34 BROWNFIELD SILOS Competing Priorities Is LACP an RDMA deployment blocker? Yes! 34 OpenFabrics Alliance Workshop 2018
35 BROWNFIELD SILOS Competing Priorities Network Admin LACP to the Host is de-facto L3 Hops VLAN / COS conversions Appliances Etc. Etc. Etc. Server Admin Hyper-Converged RDMA everywhere IOV to Tenants / Containers SDN / SDS Etc. Etc. Etc 35 OpenFabrics Alliance Workshop 2018
36 PROPOSAL: ECMP TO THE HOST (1) VPC/Crossbar Concept Offload the appearance of ECMP to the NIC Enables Host NIC Port control Worst case 50% increase in PCI BW RDMA ingress Always arrives at expected port No LACP distribution problem Capacity planning PCIe Gen3 x16 = 128Gbps 2x 40G ports w/ 50% oversubscription Is this acceptable overprovisioning? L1 Guest NetVSC vmnic Compartment PA-NIC 1 NDK SMB-NIC-1 L1 Host pnic+iov MGT-NIC vmswitch VFP Logical TOR L1 Guest NetVSC vmnic Compartment PA-NIC 2 NDK SMB-NIC-2 ptor1 ptor2 AGG1 AGG2 36 OpenFabrics Alliance Workshop 2018
37 PROPOSAL: ECMP TO THE HOST (2) LACP Offload Single Physical Port Exposed to Host LACP management and failover in NIC scope No Host visibility for Physical Port management Not a major problem Report Remaining Link Speed change on member port loss Report Link loss on all member port loss RDMA ingress From Host PoV, there s only one Port. Everything arrives correctly. LACP distribution problem goes away Is this a viable solution from NIC IHVs? Does the PCI BW oversubscription problem persist? L1 Guest NetVSC vmnic Compartment PA-NIC 1 NDK SMB-NIC-1 L1 Host pnic+iov ptor1 AGG1 MGT-NIC vmswitch VFP Logical TOR L1 Guest ptor2 AGG2 NetVSC vmnic Compartment PA-NIC 2 NDK SMB-NIC-2 37 OpenFabrics Alliance Workshop 2018
38 DIAGNOSIS Does this sounds familiar? Customer deploys fabric, RDMA doesn t work. 38 OpenFabrics Alliance Workshop 2018
39 DIAGNOSIS Does this sounds familiar? Customer deploys fabric, RDMA doesn t work. The investigation begins 39 OpenFabrics Alliance Workshop 2018
40 DIAGNOSIS Does this sounds familiar? Customer deploys fabric, RDMA doesn t work. The investigation begins Is it RoCE or iwarp? We re VLANs configured correctly? Was PFC configured correctly on all hops? Was ETS configured correctly? What NICs is the customer using? Which IHV specific counters should be inspected? Which TOR/AGG specific counters should be inspected? Did the TOR/AGG expose per-tc PFC/ETS counters? Does the TOR/AGG support PFC on priority tagged traffic? (ie. VLAN-0)? We re there any L3 Hops? Was 802.1p preserved/propagated across L3 Hops? Was ECN configured properly and relative to PFC? Is there congestion on the fabric? Was incast validated? Is there evidence of cascading HoL? Etc. Etc. Etc 40 OpenFabrics Alliance Workshop 2018
41 DIAGNOSIS 0-5G ETS Resv Host 0-5G ETS Resv (10G Effective) SW QoS TOR TC0 Tenant TC3 RDMA TC0 Tenant TC3 RDMA L3 ECN trigger Source Quench L2 PFC trigger Fast Brakes TOR TOR 41 OpenFabrics Alliance Workshop 2018
42 DIAGNOSIS 42 OpenFabrics Alliance Workshop 2018
43 DIAGNOSIS How can we make RDMA turn key? Dependency on lossless Ethernet is inherently complex for most users 43 OpenFabrics Alliance Workshop 2018
44 DIAGNOSIS How can we make RDMA turn key? Dependency on lossless Ethernet is inherently complex for most users Simple Actions Step-by-Step 0-hero deployment guides 44 OpenFabrics Alliance Workshop 2018
45 DIAGNOSIS How can we make RDMA turn key? Dependency on lossless Ethernet is inherently complex for most users Simple Actions Step-by-Step 0-hero deployment guides TORs Inconsistent in management and diagnosis 45 OpenFabrics Alliance Workshop 2018
46 DIAGNOSIS How can we make RDMA turn key? Dependency on lossless Ethernet is inherently complex for most users Simple Actions Step-by-Step 0-hero deployment guides TORs Inconsistent in management and diagnosis Verb Consumer independent monitoring Host based (ICMP, TCP, RDMA) Heartbeat tools Host logs all RDMA control path / error events 46 OpenFabrics Alliance Workshop 2018
47 DIAGNOSIS How can we make RDMA turn key? Dependency on lossless Ethernet is inherently complex for most users Simple Actions Step-by-Step 0-hero deployment guides TORs Inconsistent in management and diagnosis Verb Consumer independent monitoring Host based (ICMP, TCP, RDMA) Heartbeat tools Host logs all RDMA control path / error events Validation tools P2P stress egress unbound UDP + RDMA Expect ETS percentile = (50% RDMA + 50% UDP) Else ETS misconfiguration on Host or Fabric RDMA connection break/instability PFC misconfiguration Incast stress N-1 System counters correlation with RDMA error event 47 OpenFabrics Alliance Workshop 2018
48 DIAGNOSIS 48 OpenFabrics Alliance Workshop 2018
49 FUTURE WORK 49 OpenFabrics Alliance Workshop 2018
50 MULTITENANCY SECURING RDMA 50 OpenFabrics Alliance Workshop 2018
51 MULTITENANCY SECURING RDMA Performance and Security conflict VFs bypass security Fabric compromised Acceptable for trusted Guests RDMA RDMA NetVSC L1 Guest VF vmnic RDMA Host vnic vswitch VFP L1 Host NIC+IOV Switch 51 OpenFabrics Alliance Workshop 2018
52 MULTITENANCY SECURING RDMA Performance and Security conflict VFs bypass security Fabric compromised Acceptable for trusted Guests How can we secure tenants? RDMA RDMA NetVSC L1 Guest VF vmnic RDMA Host vnic vswitch VFP L1 Host NIC+IOV Switch 52 OpenFabrics Alliance Workshop 2018
53 MULTITENANCY SECURING RDMA Performance and Security conflict VFs bypass security Fabric compromised Acceptable for trusted Guests How can we secure tenants? 1. Control what tenant places on the fabric GFT Generic Flow Tables Parse, Push/Pop, Transpose L1 Guest RDMA RDMA NetVSC VF vmnic RDMA Host vnic vswitch VFP L1 Host GFT NIC+IOV Switch 53 OpenFabrics Alliance Workshop 2018
54 MULTITENANCY SECURING RDMA Performance and Security conflict VFs bypass security Fabric compromised Acceptable for trusted Guests How can we secure tenants? 1. Control what tenant places on the fabric GFT Generic Flow Tables Parse, Push/Pop, Transpose Tenant DCB VF level conversion Automatic DCB correction L1 Guest L1 Host RDMA Host vnic RDMA RDMA NetVSC VF vmnic Guest DCB vswitch VFP GFT NIC+IOV Switch 54 OpenFabrics Alliance Workshop 2018
55 MULTITENANCY SECURING RDMA Performance and Security conflict VFs bypass security Fabric compromised Acceptable for trusted Guests How can we secure tenants? 1. Control what tenant places on the fabric GFT Generic Flow Tables Parse, Push/Pop, Transpose Tenant DCB VF level conversion Automatic DCB correction 2. Control how much tenant places on the fabric Per-TC HW QoS Send: Caps/Reservations. Recv: Caps L1 Guest L1 Host RDMA Host vnic NIC+IOV RDMA RDMA NetVSC VF vmnic Guest DCB vswitch VFP GFT QoS Switch 55 OpenFabrics Alliance Workshop 2018
56 MULTITENANCY SECURING RDMA Performance and Security conflict VFs bypass security Fabric compromised Acceptable for trusted Guests How can we secure tenants? 1. Control what tenant places on the fabric GFT Generic Flow Tables Parse, Push/Pop, Transpose Tenant DCB VF level conversion Automatic DCB correction 2. Control how much tenant places on the fabric Per-TC HW QoS Send: Caps/Reservations. Recv: Caps 3. Control what HW resources tenant consumes L1 Guest Limit QP, CQ, PD, MR, etc. 56 OpenFabrics Alliance Workshop 2018 L1 Host RDMA Host vnic NIC+IOV RDMA RDMA NetVSC VF vmnic Guest DCB vswitch VFP GFT QoS Switch
57 RDMA HW PARTNERS 57 OpenFabrics Alliance Workshop 2018
58 14th ANNUAL WORKSHOP 2018 THANK YOU Omar Cardona Microsoft
59 14th ANNUAL WORKSHOP 2018 We re Hiring! Help us build the future of Multi-tenant Secure RDMA
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