70 lines
1.9 KiB
Markdown
70 lines
1.9 KiB
Markdown
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# Renode Guest Cache Modelling Analyzer
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## Generating traces from Renode:
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Add the following lines to the `resc` file:
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```text
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cpu MaximumBlockSize 1
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cpu CreateExecutionTracing "tracer" $ORIGIN/trace.log PCAndOpcode
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tracer TrackMemoryAccesses
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```
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## Usage:
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* Using build-in presets
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```text
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./renode_cache_interface.py trace.log presets 'fu740.u74'
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```
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* Custom cache configuration
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```text
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./renode_cache_interface.py trace.log config \
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--memory_width 64 \
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--l1i_cache_width 15 \
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--l1i_block_width 6 \
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--l1i_lines_per_set 4 \
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--l1i_replacement_policy LRU \
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--l1d_cache_width 15 \
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--l1d_block_width 6 \
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--l1d_lines_per_set 8 \
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--l1d_replacement_policy LRU \
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```
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An example output of the analysis:
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```text
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$ ./renode_cache_interface.py trace.log presets fu740.u74
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l1i,u74 configuration:
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Cache size: 32768 bytes
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Block size: 64 bytes
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Number of lines: 512
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Number of sets: 128 (4 lines per set)
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Replacement policy: RAND
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l1d,u74 configuration:
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Cache size: 32768 bytes
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Block size: 64 bytes
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Number of lines: 512
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Number of sets: 64 (8 lines per set)
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Replacement policy: RAND
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Instructions read: 174620452
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Total memory operations: 68952483 (read: 50861775, write 18090708)
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Total I/O operations: 1875 (read: 181, write 1694)
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l1i,u74 results:
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Misses: 168
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Hits: 174620284
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Invalidations: 3
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Hit ratio: 100.0%
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l1d,u74
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Misses: 17320212
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Hits: 51632271
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Invalidations: 17319700
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Hit ratio: 74.88%
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```
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Full documentation on guest CPU cache modeling is available in the [Renode documentation](https://renode.readthedocs.io/en/latest/advanced/execution-tracing.html#guest-cpu-cache-modelling).
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