Using FPGAs to accelerate NVMe-oF based Storage Networks
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1 Using FPGAs to accelerate NVMe-oF based Storage Networks Deboleena Sakalley IP & Solutions Architect, Xilinx Santa Clara, CA 1
2 Agenda NVMe-oF Offload in FPGA NVMe-oF Integrated Solution Solution Architecture Performance Conclusions Santa Clara, CA 2
3 NVMe-oF Offload in FPGA A given NVMe-oF Architecture Offload with FPGA Initiators NVMe PCIe Switch SW Stack NVMe-oF Bridging Initiators NVMe NVMe-oF Bridging PCIe Switch SW Stack NVMe NVMe FPGA NVMe-oF Target Driver OFED Driver PCIe Driver NVMe Driver Santa Clara, CA 3
4 NVMe-oF Offload in FPGA HW accelerated NVMe-oF SSD sharing across multiple hosts only in control path Doorbell exchanges to/from Discovery Connect Error handling Peer 2 peer transfer between and FPGA Initiator Initiator Initiator Ethernet NVMe NVMe NVMe-oF Bridging FPGA $? Gen3x8 PCIe Switch Bottleneck Gen3x8 q P2P Bottleneck q Too many components! q FPGA Value Add not clear Santa Clara, CA 4
5 NVMe-oF Integrated Solution Integrate functionality Use embedded FPGA processor Enable end-customer specific acceleration RAID Erasure coding De-dup Others Initiator Initiator Initiator Ethernet NVMe ET ROLE Processor FPGA FPGA NVMe Gen3x8 Gen3x8 PCIe Switch q P2P Bottleneck q Too many components! q FPGA Value Add not clear Santa Clara, CA 5
6 Solution Architecture HW implementation for Target/end point RoCE v2 Supports up to128 initiators 8 to 24 flash drives (with PCIe switch) Support for 10/25/40/100GbE and PCIe Gen3/Gen4 Datapath and control path handled in HW All recoverable errors handled in HW Ethernet Interfaces Ethernet MAC RoCE v2 (Target) ARM or Microblaze Non RoCE v2 packets Target SW Components NVMf IP PCIe RP PCIe RP NVMe Drives Embedded processor only used for Discovery Connect Error handling ET Driver NVMe-oF Driver Ethernet Driver Network Stack Management Interfaces & APIs Santa Clara, CA 6
7 Benchmarking Hardware Topology FPGA Based Setup Santa Clara, CA 7
8 Benchmarking Data: Performance FPGA Hardware Setup IOPs* SPDK vs FPGA KIOPS (SPDK) KIOPS (FPGA) IOPs* Read/Write Mix FPGA Hardware Configura@on Ini$ator: Intel(R) 3.30GHz, 12 cores, 8GB RAM CNA: Mellanox CX-4 Switch: MSN2100-CB2F Model MSN2100, 16 QSFP28 ports Target (FPGA): Fidus Sidewinder Board ZU19, 2x100G QSFP+ Target (x86): Dual Socket E (12 cores each), 128GB SSD: PCIe Gen3 x4, Capable of 740k Read IOPs each 2500 X86 (SPDK) Hardware Setup KIOPS (Rd) Page 8 *Data generated using fio and block_size=4k KIOPS (Wr)
9 Benchmarking Data: Latency FPGA Hardware Setup SPDK: read : io=2462.8mb, bw=42031kb/s, iops=10507, runt= 60000msec slat (usec): min=1, max=35, avg= 2.10, stdev= 0.51 clat (usec): min=67, max=2161, avg=92.29, stdev=11.75 lat (usec): min=75, max=2163, avg=94.47, stdev=11.7 FPGA: read : io=1219.9mb, bw=41637kb/s, iops=10409, runt= 30001msec slat (usec): min=1, max=70, avg= 3.37, stdev= 2.65 clat (usec): min=45, max=188, avg=91.47, stdev=11.49 lat (usec): min=74, max=194, avg=95.00, stdev=12.07 DAS: read : io=1283.1mb, bw=43823kb/s, iops=10955, runt= 30001msec slat (usec): min=3, max=43, avg= 3.73, stdev= 0.62 clat (usec): min=46, max=2209, avg=86.18, stdev=13.02 lat (usec): min=72, max=2213, avg=90.08, stdev=13.02 Page 9 *Data generated using fio and block_size=4k Hardware Configura@on Ini$ator: Intel(R) 3.30GHz, 12 cores, 8GB RAM CNA: Mellanox CX-4 Switch: MSN2100-CB2F Model MSN2100, 16 QSFP28 ports Target (FPGA): Fidus Sidewinder Board ZU19, 2x100G QSFP+ Target (x86): Dual Socket E (12 cores each), 128GB SSD: PCIe Gen3 x4, Capable of 740k Read IOPs each X86 (SPDK) Hardware Setup
10 Conclusions FPGA Architectures today provide a highly integrated solution to NVMe over Fabric acceleration problem Allows for low latency, high throughput storage architectures with built-in accelerators FPGAs allow for workload specific optimizations enabled with partial reconfiguration Santa Clara, CA 10
11 Thank you! Santa Clara, CA 11
12 BACKUP Santa Clara, CA 12
13 NVMe-oF Integrated Architecture FPGA Integrated end-point HW implementation for Target/end point RoCE v2 Supports up to 128 Initiators Completely HW accelerated Doorbell exchanges through HW handshake No P2P bottleneck All end point drivers running on FPGA processor Santa Clara, CA 13
14 Xilinx ET + NVMf Reference Design Demo configuration Fidus Sideweinder board with ZU19EG 4 Samsung SSDs, directly attached to FPGA via PCIe Gen3x4 2 Initiators running Open NVMf 100G Mellanox on the initiators Santa Clara, CA 14
15 NVMf + ET : FPGA Value Add NVMf + ET solution Shell and Role Model of FPGA Shell FPGA : Always ON Hard cores : PCIeG3x8 Soft cores : NVMeOFabric, ET Role FPGA Applications can be ported : FPGA E2E datapath protection/correction End point Security Caching algorithms etc Santa Clara, CA PCIe Gen3x4 CMAC ET NVMeOFabric Role Role : Applications PCIe Gen3x4 Shell : G3x4, NVMeOF, ET 15
16 FPGA Value Add Attribute Xeon + External NIC Integrated NIC + FPGA Solution Cost High. Xeon adds cost Lower Lower Solution Power Higher Lower Lower Latency, Latency Outliers High Latency, large variation in latency Low latency. Shared data and control plane within the same increases latency variation Low Latency. Orthogonal data and control place minimize latency variation Custom Accelerators In Software In Software. Limited by integrated processor capability In Hardware Hardware Reconfiguration No No Yes Additional FPGA Capabilities Storage Pooling Data Sharing Storage Virtualization Custom Accelerators Workload Specific Optimizations Page 16
17 Xilinx Device options: MPSoC Santa Clara, CA 17
18 Xilinx Device options: Virtex US+ Santa Clara, CA 18
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