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From Profiling to Optimization: Unveiling the Profile Guided Optimization

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arxiv 2507.16649 v1 pith:XDOGEIIF submitted 2025-07-22 cs.PF

From Profiling to Optimization: Unveiling the Profile Guided Optimization

classification cs.PF
keywords optimizationprofilingsamplingcompilerguidedinstrumentationintegrationperformance
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Profile Guided Optimization (PGO) uses runtime profiling to direct compiler optimization decisions, effectively combining static analysis with actual execution behavior to enhance performance. Runtime profiles, collected through instrumentation or hardware- and software-assisted sampling, provide detailed insights into control flow, branch predictions, and memory access patterns. This survey systematically categorizes PGO research by profiling method (instrumentation vs. sampling), optimizations (compile time and link/post-link time), compiler integration (GCC, LLVM), and target architectures. Key algorithms and frameworks are shown in terms of design principles. Performance evaluation on representative examples demonstrates PGO's speedups, overheads, and integration maturity. Finally, we identify open challenges, such as reducing sampling overhead, dynamic input workloads, and supporting cross-architecture portability, and propose future research directions to low-overhead profiling and advanced compilers.

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Cited by 3 Pith papers

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