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OpenResty XRay Aug 15, 2023

OpenResty XRay Updated Aug 15, 2023 5 mins read

Two bugs in Linux kernels' tracing subsystem (found by OpenResty XRay)

  • Kernel deadlocks in user-space memory reading
  • Data races in x86 breakpoint insertion of the kernel
  • What is OpenResty XRay
Photo by Yichun Zhang
  • Kernel deadlocks in user-space memory reading
  • Data races in x86 breakpoint insertion of the kernel
  • What is OpenResty XRay
xray request demo
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OpenResty XRay Jan 14, 2023

OpenResty XRay Jan 14, 2023

Automatic Analysis Reports in OpenResty XRay
Photo by Yichun Zhang
  • The Past
  • The Present
  • The Future

OpenResty XRay Nov 12, 2021

OpenResty XRay Nov 12, 2021

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 1 of 4)
Photo by Yichun Zhang
  • What is Dynamic Tracing
  • Why the “Y” Name
  • Getting Started
  • Various Backends and Runtimes
  • Why a Unified Frontend Language
  • The Language Syntax

OpenResty XRay Aug 31, 2020

OpenResty XRay Aug 31, 2020

Introduction to Lua-Land CPU Flame Graphs
Photo by Guido Jansen
  • What is a Flame Graph
  • Simple Lua samples
  • Complicated Lua applications
  • Sampling overhead
  • Safety
  • Compatibility
  • Other types of Lua-land Flame Graphs

OpenResty XRay Aug 10, 2020

OpenResty XRay Aug 10, 2020

Memory Fragmentation in OpenResty and Nginx's Shared Memory Zones
Photo by Elena Mozhvilo
  • An empty zone
  • Filling entries of similar sizes
  • Deleting odd-numbered keys
  • Deleting the keys in the first half
  • Mitigating Fragmentation

OpenResty XRay Aug 4, 2020

OpenResty XRay Aug 4, 2020

How OpenResty and Nginx Shared Memory Zones Consume RAM
Photo by Jose G. Ortega Castro
  • Slabs and pages
  • What is allocated is not what is paid for
  • Fake Memory Leaks
  • HUP reload

OpenResty XRay Jan 21, 2020

OpenResty XRay Jan 21, 2020

How OpenResty and Nginx Allocate and Manage Memory
Photo by Harrison Broadbent
  • On The System Level
  • On The Application Level
  • For Traditional Nginx Servers
Latest Articles

OpenResty XRay Apr 7, 2025

OpenResty XRay Apr 7, 2025

OpenResty XRay Helps Boost Script Performance by 44 Times
OpenResty XRay Helps Boost Script Performance by 44 Times
  • From Bottleneck Discovery to Significant Speed Improvement
  • How OpenResty XRay Works
  • Comparison with Traditional Methods

OpenResty XRay Apr 3, 2025

OpenResty XRay Apr 3, 2025

Cross-Media Data Structure Drift: OpenResty XRay Enables 20x Performance Improvement
Cross-Media Data Structure Drift: OpenResty XRay Enables 20x Performance Improvement
  • Performance Challenges and Breakthroughs
  • Practical Significance of 20x Performance Improvement
  • Future Outlook

OpenResty XRay Apr 2, 2025

OpenResty XRay Apr 2, 2025

From OOM to O(1): The Implementation Path of Streaming JSON Parser
From OOM to O(1): The Implementation Path of Streaming JSON Parser
  • Differences between JSONL format and traditional JSON
  • Solution
  • Continuous optimization
  • Technical insights
  • verification

OpenResty XRay Apr 1, 2025

OpenResty XRay Apr 1, 2025

From Days to Hours: How OpenResty XRay Accelerated the Linux shred Tool by Dozens of Times
From Days to Hours: How OpenResty XRay Accelerated the Linux shred Tool by Dozens of Times
  • Problem Analysis
  • OpenResty XRay Practical Results
  • Optimization Process
  • Application Value

OpenResty XRay Mar 31, 2025

OpenResty XRay Mar 31, 2025

Case Study: OpenResty XRay Doubles Ylang Compiler Performance
Case Study: OpenResty XRay Doubles Ylang Compiler Performance
  • Case Study: OpenResty XRay Doubles Ylang Compiler Performance
  • Significant Optimization Results
  • Ylang Language: The Ideal Tool for Dynamic Tracing
  • A Model of Technical Synergy
  • Further Reading
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