Linux Performance Tuning, Performance Tools

8–Linux Driver Installation and Configuration Linux Performance Tuning

NOTE:

While running these tests, the network traffic will be interrupted.

Linux Performance Tuning

This section describes Linux performance tuning.

NOTE:

The tunable performance parameters are system and application specific. Understanding the relationship between the parameter values, target workload, performance applications, operating system, and system configuration provides a better understanding of performance optimization and bottlenecks.

Performance Tools

Add the following parameters for performance tuning on Linux systems in the /etc/sysctl.conf file:

net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.core.optmem_max = 524287 net.core.netdev_max_backlog = 250000 net.ipv4.tcp_rmem = 4096 87380 16777216 net.ipv4.tcp_wmem = 4096 87380 16777216 net.ipv4.tcp_timestamps = 0 net.ipv4.tcp_sack = 1 net.ipv4.tcp_low_latency = 0 net.ipv4.tcp_window_scaling = 1 net.ipv4.tcp_moderate_rcvbuf = 1 net.ipv4.route.flush = 1

NOTE:

Various factors including tools, kernel, stacks, and related parameters affect system performance.

Using the iperf Tool

The iperf tool measures network performance. The following paragraphs show how to use iperf; however, it can be further tuned depending on your system’s requirements.

NE0154601-00 C

8-9

3000, 3100 specifications

The Q-Logic 3100 and 3000 series are advanced networking solutions designed for high-performance data centers and enterprise environments. Known for their innovative technology, these switches and adapters are tailored for seamless integration in modern computing infrastructures, offering scalability and robustness essential for today's demanding applications.

One of the standout features of the Q-Logic 3100 and 3000 series is their support for high-speed data transmission, reaching up to 16 Gbps in Fibre Channel connections. This capability ensures minimal latency and exceptional throughput, which is critical for applications that require rapid data access and processing, like virtualization and cloud computing.

Both series incorporate cutting-edge virtualization technologies, enabling multiple environments to be managed efficiently through a single physical instance. This support for virtualization reduces hardware costs and maximizes resource utilization, a vital aspect for organizations looking to optimize their IT investments. Additionally, the series provides enhanced Quality of Service (QoS) features, which prioritize data traffic and ensure stable performance across various applications.

Security is another primary concern addressed by the Q-Logic 3100 and 3000 series. They offer advanced security features, including hardware-based encryption, which protects data in transit and at rest. Access control mechanisms are in place to prevent unauthorized access, making these solutions suitable for organizations that handle sensitive information.

The Q-Logic 3100 and 3000 series are built with reliability in mind. They include built-in redundancy features, such as dual power supplies and hot-swappable components, which reduce the risk of system failure and improve overall uptime. This reliability is crucial for businesses that operate around the clock, as downtime can lead to significant financial losses.

Configuration and management of the Q-Logic series are simplified through user-friendly interfaces and comprehensive management tools. These tools allow administrators to monitor performance, configure settings, and troubleshoot issues efficiently, thereby enhancing operational productivity.

In summary, the Q-Logic 3100 and 3000 series stand out as exemplary solutions for high-performance networking needs. With their impressive speed, support for virtualization, strong security features, and robust reliability, these products continue to solidify their position as leaders in the networking technology landscape. As businesses evolve and grow, these innovative solutions are poised to adapt and meet the challenges of the future.