| _2025-04-18_19：20：44_ | 2025-04-18 19：20：44 | | RISC-V on the Performance Top _ Performance Blog | | 原文链接失效了?试试备份 | | TAGs:处理器 risc-v 性能 | | Summary: This text consists of several blog posts by Fei Wu discussing various topics related to RISC-V, including its performance, vector extensions on Valgrind, the importance of frame pointers, implicit type conversions causing panics, Git bisect for debugging, RISC-V interrupt handling, challenges and advantages of RISC-V, and RISC-V syscall performance regression. The posts also mention testing results and commands used for analysis.本文由 Fei Wu 的几篇博客文章组成，讨论了与 RISC-V 相关的各种主题，包括其性能、Valgrind 上的向量扩展、帧指针的重要性、导致 panic 的隐式类型转换、用于调试的 Git bisect、RISC-V 中断处理、RISC-V 的挑战和优势以及 RISC-V 系统调用性能回归。这些帖子还提到了用于分析的测试结果和命令。 | |
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| _2025-03-07_12：05：21_ | 2025-03-07 12：05：21 | | ARM_virtualization Performance and Architectural Implications - DeepSeek - 探索未至之境 | | 原文链接失效了?试试备份 | | TAGs:虚拟化&容器 性能 | | Summary: This paper explores the performance of ARM virtualization on server hardware, specifically focusing on multi-core ARM systems and comparing two popular hypervisors, KVM and Xen, on both ARM and x86 platforms. The study reveals that ARM enables significantly faster transitions between a virtual machine (VM) and a Type 1 hypervisor like Xen compared to x86, but Type 2 hypervisors like KVM on ARMv8.0 have higher overhead for VM-to-hypervisor transitions. The researchers also discuss the impact of hypervisor software design and implementation on overall performance. They propose improvements to the ARM architecture, such as Virtualization Host Extensions (VHE), to bring Type 2 hypervisors' fast transition costs to real application workloads involving I/O. The research is significant as ARM servers are becoming increasingly common, and understanding their virtualization performance is crucial for hardware and software architects.本文探讨了 ARM 虚拟化在服务器硬件上的性能，特别关注多核 ARM 系统，并比较了 ARM 和 x86 平台上两种流行的虚拟机管理程序 KVM 和 Xen。研究表明，与 x86 相比，ARM 可以在虚拟机 （VM） 和 Xen 等 1 类管理程序之间实现更快的转换，但 ARMv8.0 上的 KVM 等 2 类管理程序具有更高的 VM 到管理程序转换开销。研究人员还讨论了虚拟机管理程序软件设计和实施对整体性能的影响。他们提出了对 ARM 架构的改进，例如虚拟化主机扩展 （VHE），以将 Type 2 虚拟机管理程序的快速转换成本引入涉及 I/O 的实际应用程序工作负载。随着 ARM 服务器变得越来越普遍，了解其虚拟化性能对于硬件和软件架构师来说至关重要，因此这项研究具有重要意义。 | |
| _2025-03-07_11：08：51_ | 2025-03-07 11：08：51 | | KVM性能分析工具-zhurunguang-ChinaUnix博客 | | 原文链接失效了?试试备份 | | TAGs:虚拟化&容器 性能 | | Summary: This text is about an announcement on a Chinese tech blog, "ChinaUnix," regarding temporary service disruptions for blogging due to server migration from September 30 to October 4, 2025. The blog post also includes statistics on KVM performance events and their analysis. The blog is written by a user named "zhurunguang" and has 123 articles, 0 blog points, and 11 technical points. The blog's categories include virtualization, Linux commands, MySQL, shell scripts, and KVM performance analysis. The text also includes code snippets for enabling and disabling KVM tracing and analyzing KVM performance data.本文是关于中国科技博客“ChinaUnix”上的公告，该公告涉及 2025 年 9 月 30 日至 10 月 4 日期间由于服务器迁移而导致博客服务临时中断。该博客文章还包括有关 KVM 性能事件及其分析的统计数据。该博客由一位名为“zhurunguang”的用户撰写，有 123 篇文章，0 个博客点，11 个技术点。该博客的类别包括虚拟化、Linux 命令、MySQL、shell 脚本和 KVM 性能分析。该文本还包括用于启用和禁用 KVM 跟踪以及分析 KVM 性能数据的代码片段。 | |
| _2025-03-07_10：51：08_ | 2025-03-07 10：51：08 | | Perf events - KVM | | 原文链接失效了?试试备份 | | TAGs:虚拟化&容器 性能 | | Summary: This page explains how to use the Linux perf tool for counting and tracing performance events in the KVM kernel module. Previously, tools like kvm\_stat and kvm\_trace were used for this purpose, but now standard Linux tracing tools are used instead. The page covers counting and tracing events, recording events for the host and guest, and reporting events. The perf tool can be used to count events using the `perf stat` command, and detailed traces can be generated using ftrace. Events can be recorded to a file for later analysis, and the order of arguments is important when using the perf command. The page also mentions an alternative method of getting the guest's kallsyms and modules using sshfs and the --guestmount option.本页解释了如何使用 Linux perf 工具对 KVM 内核模块中的性能事件进行计数和跟踪。以前，kvm\_stat 和 kvm\_trace 等工具用于此目的，但现在使用标准的 Linux 跟踪工具。该页面涵盖计数和跟踪事件、记录主机和客户机的事件以及报告事件。perf 工具可用于使用 'perf stat' 命令对事件进行计数，并且可以使用 ftrace 生成详细的跟踪。可以将事件记录到文件中以供以后分析，并且在使用 perf 命令时，参数的顺序很重要。该页面还提到了使用 sshfs 和 --guestmount 选项获取客户机的 kallsym 和模块的替代方法。 | |
| _2025_1_23_14：14：28_ | 2025_1_23 14：14：28 | | QEMU：性能分析的故事 | | 原文链接失效了?试试备份 | | TAGs:虚拟化&容器 性能 | | saved date: Thu Jan 23 2025 14:14:28 GMT+0800 (中国标准时间) | |
| _2025-03-14_16：51：19_ | 2025-03-14 16：51：19 | | Virtualization Tuning and Optimization Guide _ Red Hat Product Documentation | | 原文链接失效了?试试备份 | | TAGs:虚拟化&容器 性能 | | Summary: The Red Hat Enterprise Linux Virtualization Tuning and Optimization Guide focuses on enhancing KVM performance. It offers tips for utilizing KVM features and optimizing host systems and virtualized guests. KVM guests run as Linux processes on the host, with virtual CPUs (vCPUs) handled by the Linux scheduler. Resource allocation and virtual hardware configuration significantly impact guest performance. | |
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