These are a set of features which extend the capablities of the branch predictor simulator #2
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rosethompson
commented
Sep 20, 2023
rosethompson
commented
- Adds a command line argument to change the index hashing function. RISC-V and other architectures support compressed 2-byte instructions. It is useful to change the indexing function to include PC[1] in the hash. This is enabled with -c.
- Adds a training mode. Optionally allows the simulator to take in input to train the branch predictor before computing statistics. This is supported passively by resetting the counters when the keyword "BEGIN" is read from a line in the trace file. All branches before the BEGIN are treated as training and all after as the true payload.
…lternate hash function with better results for a mix of compressed (2 byte) and non-compressed (4 byte) instructions.
-c enables the alternate hash function.
…t ensure it is used to train the branch predictors.
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@synxlin Hi Yujun. Is there any chance you can review this pull request and either suggest changes or merge it? |
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