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Questions - intel-pmu

What does this sentence mean in the context of perf tool: "Supports address when precise (Precise event)"?

This line appears under memory events in perf tool. CPU: Intel Xeon Gold
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Vishal Deka

linux

profiling

perf

memory-profiling

intel-pmu

Votes: 0

Answers: 1

Latest Answer

"Precise" events mean using PEBS instead of the traditional firing an interrupt when the counter overflows. Instead it writes a sample in a buffer to be collected later, so it can attribute...
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Peter Cordes

Perf cannot use symbol from kernel module

I want to trace a kernel module I've written using Intel PT but I can not get perf to recognize symbols from my kernel modules. For the sake of simplicity, I tried tracing a module that periodically p...
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Can Cebeci

linux-kernel

profiling

kernel-module

perf

intel-pmu

Votes: 0

Answers: 1

Latest Answer

A workaround is possible: perf record -e intel_pt// -a "$(printf 'filter print_hello\t[hello_periodic]')" sleep 1 Or just use numbers: perf record -e intel_pt// -a --filter 'filter 0xffffff...
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Ajay

Are the event ratios in Appendix B.8 of Intel's Optimization Reference Manual applicable to other microarchitectures?

Appendix B.8 of the Intel 64 and IA-32 Architectures Optimization Reference Manual (June 2021) contain useful event ratios for performance analysis, workload characterization, and performance tuning. ...
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bryantcurto

performance

x86

intel-pmu

Votes: 0

Answers: 0

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