profiling

OpenResty XRay Nov 1, 2023

OpenResty XRay Updated Nov 1, 2023 6 mins read

How CPU time is spent inside llama.cpp + LLaMA2 (using OpenResty XRay)

Problem: high CPU usage
Use the guidede analysis feature of OpenResty XRay to spot the hottest C++ code paths
Automatic analysis and reports
What is OpenResty XRay

Problem: high CPU usage
Use the guidede analysis feature of OpenResty XRay to spot the hottest C++ code paths
Automatic analysis and reports
What is OpenResty XRay

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

OpenResty Open Source Oct 22, 2024

OpenResty Open Source Oct 22, 2024

OpenResty 1.27.1.1 Released

Version highlights
Full Changelog
Feedback

OpenResty XRay Oct 10, 2024

OpenResty XRay Oct 10, 2024

Analyzing Tomcat Java Web Application Request Latency (Using OpenResty XRay)

Photo by Yichun Zhang

Analyzing Tomcat Java Web application request latency
Flexible filtering conditions for request capture
Detailed request information capture
PCAP packet capture functionality
Practical application examples

OpenResty XRay Sep 20, 2024

OpenResty XRay Sep 20, 2024

Analyzing CPU, off-CPU and Disk I/O Usage of Java Applications (Using OpenResty XRay)

Photo by Yichun Zhang

High CPU usage issues in Java applications
CPU blocking issues in Java applications
High disk I/O issues in Java applications
Supported Java versions and operating systems
Performance impact and overhead
Future plans

OpenResty XRay Sep 5, 2024

OpenResty XRay Sep 5, 2024

A Quick Tour to OpenResty XRay’s Web Console

A Quick Tour to OpenResty XRay’s Web Console

Introduction to Insight Page
Comprehensive Report Details
Dashboard Overview
Use Guided Analysis Feature to Analyze Online
Setting and Configuration
What is OpenResty XRay

OpenResty XRay Aug 12, 2024

OpenResty XRay Aug 12, 2024

Pinpointing the Python Code Paths with High Disk I/O (using OpenResty XRay)

Pinpointing the Python Code Paths with High Disk I/O (using OpenResty XRay)

Problem: high disk I/O
Spot the problematic Python code paths
Automatic analysis and reports
What is OpenResty XRay

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