Olympia is a Performance Model for the RISC-V community as an example of an Out-of-Order RISC-V CPU Performance Model based on the Sparta Modeling Framework.
Olympia's intent is to provide a basis for RISC-V CPU development enabling the community to build upon Olympia, extending its functionality in areas like branch prediction, prefetching/caching concepts, application profiling, middle-core design, etc.
Currently, Olympia is a trace-driven simulator running instructions streams provided in either JSON format or STF. However, extending Olympia with a functional back-end to run applications natively is under development.
- Download and build Sparta. Follow the directions on the Sparta README
- Clone olympia
git clone --recursive [email protected]:riscv-software-src/riscv-perf-model.git - Build Olympia
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# Optimized
# A release build
mkdir release; cd release
# Assumes a build of sparta at /path/to/map/sparta/release
cmake .. -DCMAKE_BUILD_TYPE=Release -DSPARTA_BASE=/path/to/map/sparta
# Just builds the simulator
make olympia
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# Debug
# A release build
mkdir debug; cd debug
# Assumes a build of sparta at /path/to/map/sparta/debug
cmake .. -DCMAKE_BUILD_TYPE=Debug -DSPARTA_BASE=/path/to/map/sparta
# Just builds the simulator
make olympia
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# Regression
make regress
Rename doesn't actually rename. In fact, there are no operand dependencies supported... yet. (This work to be done)[riscv-software-src#2]
./olympia --help # Full help
./olympia --help-brief # Brief help
./olympia --help-topic topics # Topics to get detailed help on
./olympia --help-topic parameters # Help on parameters
./olympia --show-tree --no-run # Show the full tree; do not run the simulator
./olympia --show-parameters --no-run # Show the parameter tree; do not run the simulator
./olympia --show-loggers --no-run # Show the loggers; do not run the simulator
# ... more --show options; see help
# Run a given JSON "trace" file
./olympia ../traces/example_json.json
# Run a given STF trace file
./olympia ../traces/dhrystone.zstf
# Run a given STF trace file only 100K instructions
./olympia -i100K ../traces/dhrystone.zstf
# Run a given STF trace file and generate a
# generic full simulation report
./olympia ../traces/dhrystone.zstf --report-all dhry_report.out
# Generate a baseline config
./olympia --write-final-config baseline.yaml --no-run
# Generate a config with a parameter change
./olympia -p top.cpu.core0.lsu.params.tlb_always_hit true --write-final-config always_hit_DL1.yaml --no-run
dyff between baseline.yaml always_hit_DL1.yaml
# Use the configuration file generated
./olympia -c always_hit_DL1.yaml -i1M ../traces/dhrystone.zstf
# Log of all messages, different outputs
./olympia -i1K --auto-summary off ../traces/dhrystone.zstf \
-l top info all_messages.log.basic \
-l top info all_messages.log.verbose \
-l top info all_messages.log.raw
# Different logs, some shared
./olympia -i1K --auto-summary off ../traces/dhrystone.zstf \
-l top.*.*.decode info decode.log \
-l top.*.*.rob info rob.log \
-l top.*.*.decode info decode_rob.log \
-l top.*.*.rob info decode_rob.log
# Run with 1M instructions, generate a report from the top of the tree
# with stats that are not hidden; turn off the auto reporting
cat reports/core_stats.yaml
./olympia -i1M ../traces/dhrystone.zstf --auto-summary off --report "top" reports/core_stats.yaml my_full_report.txt text
# Generate a report only for decode in text form
./olympia -i1M ../traces/dhrystone.zstf --auto-summary off --report "top.cpu.core0.decode" reports/core_stats.yaml my_decode_report.txt text
# Generate a report in JSON format
./olympia -i1M ../traces/dhrystone.zstf --auto-summary off --report "top" reports/core_stats.yaml my_json_report.json json
# Generate a report in CSV format
./olympia -i1M ../traces/dhrystone.zstf --auto-summary off --report "top" reports/core_stats.yaml my_csv_report.csv csv
# Generate a report in HTML format
./olympia -i1M ../traces/dhrystone.zstf --auto-summary off --report "top" reports/core_stats.yaml my_html_report.html html
# Using a report definition file, program the report collection to
# start after 500K instructions
cat reports/core_report.def
./olympia -i1M ../traces/dhrystone.zstf --auto-summary off \
--report reports/core_report.def \
--report-search reports \
--report-yaml-replacements \
OUT_BASE my_report \
OUT_FORMAT text \
INST_START 500K
# Generate a time-series report -- capture all stats every 10K instructions
cat reports/core_timeseries.def
./olympia -i1M ../traces/dhrystone.zstf --auto-summary off \
--report reports/core_timeseries.def \
--report-search reports \
--report-yaml-replacements \
OUT_BASE my_report \
TS_PERIOD 10K
python3 ./reports/plot_ts.y my_report_time_series_all.csv
# By default, olympia uses the small_core architecture
./olympia -i1M ../traces/dhrystone.zstf --auto-summary off --report-all report_small.out
# Use the medium sized core
cat arches/medium_core.yaml # Example the medium core
./olympia -i1M ../traces/dhrystone.zstf --arch medium_core --auto-summary off --report-all report_medium.out
diff -y -W 150 report_small.out report_medium.out
# Use the big core
cat arches/big_core.yaml # Example the medium core
./olympia -i1M ../traces/dhrystone.zstf --arch big_core --auto-summary off --report-all report_big.out
diff -y -W 150 report_medium.out report_big.out
./olympia -i1M ../traces/dhrystone.zstf --debug-on-icount 100K -i 101K -z pipeout_1K --auto-summary off
# Launch the viewer
# *** MacOS use pythonw
python $MAP_BASE/helios/pipeViewer/pipe_view/argos.py -d pipeout_1K -l ../layouts/core.alf
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