45 lines
1.1 KiB
Markdown
45 lines
1.1 KiB
Markdown
# Running the benchmarks
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Pick some name for your `eh_elfs` directory. We will call it `$EH_ELF_DIR`.
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## Generate the `eh_elfs`
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```bash
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../../generate_eh_elf.py --deps -o "$EH_ELF_DIR" \
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--keep-holes -O2 --global-switch --enable-deref-arg hackbench
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```
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## Record a `perf` session
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```bash
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perf record --call-graph dwarf,4096 ./hackbench 10 process 100
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```
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You can arbitrarily increase the first number up to ~100 and the second to get
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a longer session. This will most probably take all your computer's resources
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while it is running.
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## Set up the environment
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```bash
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source ../../env/apply [vanilla | vanilla-nocache | *eh_elf] [dbg | *release]
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```
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The first value selects the version of libunwind you will be running, the
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second selects whether you want to run in debug or release mode (use release to
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get readings, debug to check for errors).
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You can reset your environment to its previous state by running `deactivate`.
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If you pick the `eh_elf` flavour, you will also have to
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```bash
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export LD_LIBRARY_PATH="$EH_ELF_DIR:$LD_LIBRARY_PATH"
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```
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### Actually get readings
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```bash
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perf report 2>&1 >/dev/null
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```
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