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イマドキなNetwork/IO
- 2. • IO • Linux • Vyatta PC
- 3. Process(User) Process(Kernel) socket queue input SW Intr Handler queue HW Intr Handler
- 4. • NIC • NIC:1GbE→10GbE • CPU:1GHz→3.2GHz :CPU 1/10 • CPU • 1CPU → •
- 5. • NIC NIC •
- 6. Process(User) Process(Kernel) socket queue input SW Intr Handler queue HW Intr Handler
- 8. • • NIC NIC • • →NAPI Linux http://tinyurl.com/LinuxNAPI
- 9. NAPI Process(User) Process(Kernel) socket queue SW Intr Handler HW Intr Handler
- 10. • NIC CPU →CPU • 1Gbps Pentium4 2.4GHz CPU 80% • CPU
- 11. Process(User) Process(Kernel) socket queue SW Intr Handler HW Intr Handler
- 12. TOE (TCP Offload Engine) • NIC TCP/IP • • TOE OS • OS TOE TOE
- 13. TOE (TCP Offload Engine) • Linux • Windows OS http://bit.ly/offload • RDMA, iSCSI HBA
- 14. • TCP Checksum Offload TCP • Large Segment Offload 64KB NIC MTU • Large Receive Offload LSO NIC
- 15. Linux • TCP Checksum Offload TCP • Large Segment Offload 64KB NIC MTU • Large Receive Offload LSO NIC
- 16. • NIC CPU •
- 17. CPU cpu0 cpu1 Process(User) Process(User) Process(Kernel) Process(Kernel) socket socket queue queue SW Intr Handler SW Intr Handler HW Intr Handler HW Intr Handler
- 18. Receive Side Scaling • • CPU CPU • CPU • CPU →
- 19. Receive Side Scaling cpu0 cpu1 cpu2 cpu3 RX RX RX RX Queue Queue Queue Queue #0 #1 #2 #3 hash queue ■ 0 ■ 1 NIC
- 20. Receive Side Scaling • Microsoft Scalable Network Initiative http://bit.ly/ReceiveSideScaling • Windows Linux • • PCI MSI-X • NIC RSS
- 21. RPS(Linux) • RSS NIC • RSS • CPU • CPU CPU • RSS
- 22. cpu0 cpu1 cpu2 cpu3 socket socket queue queue hash queue backlog ■ 0 #1 ■ 1 backlog #2 backlog #3
- 23. RFS(Linux) • CPU RPS •
- 24. RPS
- 25. CPU
- 26. • Intel http://bit.ly/IOATJ • NIC CPU OS • CPU I/O • CPU
- 27. TOE • TOE • CPU CPU →TCP/IP • TCP/IP CPU TOE →
- 28. Intel I/O Acceleration Technology • Intel QuickData Technology • Direct Cache Access • Receive Side Scaling • Large Receive Offload • Low Latency Interrupts
- 29. Intel QuickData Technology • NIC → DMA • CPU • OS
- 30. Intel QuickData Technology Process(User) Process(Kernel) socket queue SW Intr Handler HW Intr Handler
- 31. Direct Cache Access • NIC DMA CPU • NIC • prefetch
- 32. DCA CPU Cache Fetch Snoop invalidate Writeback Memory Memory Controller Memory Wirte DMA Write I/O Device
- 33. DCA CPU Cache HW Prefetch Snoop invalidate Writeback +hint Memory Memory Controller Memory Wirte DMA Write I/O Device
- 34. • Intel VT-c • SR-IOV • OS NIC • VMDq • VM IO
- 35. VM1 VM2 Hypervisor
- 36. Intel VT-d PCI Passthrough VM1 VM2 Hypervisor
- 37. SR-IOV VM1 VM2 Hypervisor
- 38. VMDq VM1 VM2 Hypervisor RX1 RX2 RX1 RX2 RX1 RX1 RX2 RX1 RX1 RX2
- 39. • • • • Intel
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