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1592abd1 |
| 08-Apr-2025 |
Yan Xu <[email protected]> |
feat: support inst lifetime trace (#4007)
PerfCCT(performance counter commit trace) is a Instruction-level granularity perfCounter like GEM5 How to use this: 1. Make with "WITH_CHISELDB=1" argument
feat: support inst lifetime trace (#4007)
PerfCCT(performance counter commit trace) is a Instruction-level granularity perfCounter like GEM5 How to use this: 1. Make with "WITH_CHISELDB=1" argument 2. Run with "--dump-db --dump-select-db lifetime", then get the database 3. Instruction lifetime visualize run "python3 scripts/perfcct.py "the-db-file-path" -p 1 -v | less" 4. Analysis script now is in XS-GEM5 repo, see https://github.com/OpenXiangShan/GEM5/blob/xs-dev/util/ClockAnalysis.py
How it works: 1. Allocate one unique tag "seqNum" like GEM5 for each instruction at fetch stage 2. Passing the "seqNum" in each pipeline 3. Recording perf data through the DPIC interface
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