KDAB/hotspot
Hotspot
Hotspot is a graphical user interface for analyzing and visualizing performance data captured by the Linux perf tool. It functions as a performance profiling visualizer and assembly-level profiler that maps performance costs to specific instructions synchronized with original source code.
The project distinguishes itself through a remote symbol resolver that maps performance data from embedded targets to local host debug symbols and sysroots. It also includes a specialized off-CPU analysis tool designed to identify thread wait times and I/O blocks using kernel scheduler tracepoints.
The tool covers a broad range of performance analysis capabilities, including CPU profiling, low-level code inspection, and timeline-based data filtering. It provides visualization methods such as flame graphs and call graphs to identify system bottlenecks and inlined functions.
The system supports recording data by launching profiling tools for new applications or attaching to existing processes, and allows the export of analyzed performance profiles into portable formats for cross-machine sharing.
Features
- CPU Profilers - Provides a comprehensive workflow for recording and visualizing CPU execution patterns to identify bottlenecks in Linux applications.
- Performance Profilers - Provides a graphical interface for measuring and analyzing execution time and resource usage to identify software bottlenecks.
- Debug Symbol Resolvers - Resolves raw memory addresses to function names and source lines using local sysroots or remote debug symbol servers.
- Hierarchical Performance Visualizers - Provides interactive flame graphs and call graphs to visualize hierarchical stack trace data and identify performance bottlenecks.
- Perf Data Parsers - Parses Linux perf.data files to extract hardware counters and tracepoints for graphical visualization.
- Assembly-Level Profilers - Functions as a specialized disassembler that maps execution costs to assembly instructions synchronized with the original source code.
- Off-CPU Latency Analyzers - Detects I/O blocks and lock contention by tracking the time threads spend in non-running states via kernel tracepoints.
- Binary-to-Source Mapping - Links disassembled machine instructions back to their original source code locations for detailed performance debugging.
- Instruction-Level Cost Analysis - Determines the specific performance cost of individual assembly instructions by correlating sampled execution counts with disassembled code.
- Remote Symbol Fetching - Automatically downloads required debug symbols from remote servers to enable symbolization of performance data.
- Kernel Scheduler Trace-Mapping - Analyzes off-CPU time by correlating kernel scheduler tracepoints with thread states to identify blocking I/O or lock contention.
- Low-Level Machine Code Optimizations - Enables optimization of critical paths by examining the cost of individual assembly instructions synchronized with source code.
- Cross-Machine Symbol Resolution - Maps performance data recorded on embedded systems to local host debug symbols by specifying sysroots and paths.
- Linux Performance Analysis - Provides a graphical interface to visualize and analyze system bottlenecks using Linux perf data.
- Linux perf GUIs - Provides a full graphical user interface for analyzing and visualizing performance data captured by the Linux perf tool.
- Performance Profiling Tools - Visualizes system bottlenecks using interactive flame graphs, call graphs, and timeline-based performance analysis.
- Temporal & Process Filters - Allows updating performance data views by filtering results based on specific time ranges, processes, or threads.
- Temporal Range Filters - Allows refining performance datasets by slicing profiles based on specific temporal windows or process IDs.
- Embedded Systems Debugging - Supports debugging software on embedded architectures by mapping performance data to local host debug symbols.
- Application Performance Profiling - Captures performance data by launching profiling tools for new applications or attaching to existing running processes.
- Assembly Inspection Tools - Displays the specific cost per instruction in assembly with synchronized highlighting back to the source code.
- Debugging And Tracing - Provides a GUI for Linux perf analysis.
- Performance Analysis Tools - Linux perf GUI for performance analysis and visualization.
Star history
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