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