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Tag: perf

perf enable demangling of callgraph

How do I enable C++ demangling for the perf callgraph? It seems to demangle symbols when I go into annotate mode, but not in the main callgraph. Sample code (using Google Benchmark): build command: perf commands: I’ve also tried enabling the –demangle option, but that doesn’t seem to affect the output. callgraph missing demangled symbols: annotated disassembly showing demangled calls:

Capturing user-space variables at “perf” events

I’ve now been able to get perf to capture a user-space stack`, but I’m not sure how to convince it to capture values passed by reference as pointers, or to snapshot globals of interest. Specifically, I’m trying to analyse the system-wide performance of PostgreSQL under various loads with and without a performance related patch. One of the key things I

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