leandromoreira/linux-network-performance-parameters

Features

• Packet Flow References - Serves as a structured reference mapping Linux kernel network sysctl parameters to their roles in packet processing.
• NIC Interrupt Coalescing Parameters - Provides a structured reference for tuning NIC interrupt coalescing parameters to balance latency and CPU usage.
• Sysctl Network Tunings - Provides a structured reference for tuning kernel network parameters via sysctl files in /proc/sys.
• TCP Congestion Control Configuration - Provides guidance on selecting and configuring TCP congestion control algorithms for different network conditions.
• NIC Ring Buffer Resizing - Provides guidance on resizing NIC ring buffers to handle packet bursts and prevent drops.
• Ingress Packet Processing Tuning - Documents sysctl parameters for tuning the entire ingress packet processing pipeline from NIC to application.
• TCP Connection Handling Configuration - Documents sysctl parameters for configuring TCP connection handling, including backlog, SYN queue, and timeout settings.
• Interrupt Coalescing Configuration - Provides a reference for configuring NIC interrupt coalescing and NAPI polling budgets to optimize network performance.
• NIC Ring Buffer Size Adjustment - Documents how to adjust NIC ring buffer sizes to prevent packet drops during traffic bursts.
• Kernel Network Tuning - Provides a comprehensive reference for optimizing kernel-level network parameters on Linux servers.
• NAPI Polling Cycle Tuning - Documents sysctl parameters for tuning NAPI polling cycles to balance network throughput and CPU utilization.
• Kernel Queuing Disciplines - Covers configuring the transmit queue length and default queuing algorithm for egress packet management.
• Coalescing Configurations - Explains how to configure NIC interrupt coalescing delays to trade latency for CPU efficiency.
• Bufferbloat Controls - Covers adjusting egress queuing disciplines, ring buffers, and ingress backlog limits to control bufferbloat.
• Connection Backlog Tuning - Describes configuring kernel-level TCP listen backlog and SYN queue limits to control pending connections.
• TCP Connection Handling - Documents configuring TCP listen backlog, SYN queue, FIN timeout, and syncookies for connection handling.
• Ingress Queue Depth Limiters - Documents sysctl parameters for limiting ingress queue depth to prevent packet drops under kernel overload.
• Performance Diagnostics - Provides diagnostic commands for inspecting packet drops, queue lengths, interrupt activity, and TCP states.
• Queue Depth Settings - Documents setting the transmit queue length to manage outgoing packet bursts and bufferbloat.
• Selection Interfaces - Documents how to select and switch TCP congestion control algorithms via sysctl parameters.
• Egress Path Tuning - Covers tuning the egress packet path from application socket buffers through QDiscs and ring buffers to the NIC.
• Soft IRQ and Ingress Queuing Adjustments - Documents sysctl parameters for tuning soft IRQ and ingress queuing to balance packet processing throughput and latency.
• TCP Connection Queue Limit Configuration - Documents how to configure the TCP listen backlog limit to control pending connection queue depth.
• Algorithm Selection - Documents how to select and switch TCP congestion control algorithms via sysctl parameters.
• TCP Socket Buffer Tuning - Describes adjusting TCP send and receive buffer sizes with auto-tuning to balance memory and performance.
• Auto-Tuning Mechanisms - Explains how the kernel automatically tunes TCP buffer sizes using the bandwidth-delay product.
• NAPI Polling Models - Documents the NAPI polling model used by the kernel to batch-process network packets.
• Ring Buffers - Describes NIC driver ring buffers that temporarily store packets during bursts to prevent drops.
• Queuing Disciplines - Covers configuring egress queuing disciplines like pfifofast and fqcodel to manage packet bursts.
• Curated Lists - Listed in the “Curated Lists” section of the The Book Of Secret Knowledge awesome list.

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