20561b893d
Change-Id: I8274826803a07016b9fd08efe60a2f1c77751c5d Signed-off-by: Mao Han <han_mao@linux.alibaba.com> Signed-off-by: Xia Lifang <lifang_xia@linux.alibaba.com> Signed-off-by: Chen Guoyin <chenguoyin.cgy@linux.alibaba.com> Signed-off-by: Wang Chen <wangchen20@iscas.ac.cn> Signed-off-by: Lu Xufan <luxufan@iscas.ac.cn> Test: `mm -j` in bionic/ |
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|---|---|---|
| .. | ||
| gen | ||
| include | ||
| regen | ||
| .gitignore | ||
| Android.bp | ||
| gen_bench.sh | ||
| linker_reloc_bench.cpp | ||
| README.md | ||
| run_bench_with_ninja.sh | ||
Dynamic Linker Relocation Benchmark
This benchmark measures the time spent in the dynamic linker to load a large set
of shared objects with many symbols and relocations. It mimics the work involved
in loading a fixed version of libandroid_servers.so.
Running the benchmark
To run the benchmark, build the linker-reloc-bench target, sync data, and
run the benchmark from /data/benchmarktest[64]/linker-reloc-bench.
There is also a run_bench_with_ninja.sh script that uses the
gen_bench.py --ninja mode to generate a benchmark. It's useful for
experimentation. The --cc and --linker flags allow swapping out different
static and dynamic linkers.
Regenerating the synthetic benchmark
regen/dump_relocs.py scans an ELF file and its dependencies, outputting a JSON
dump, then regen/gen_bench.py processes the JSON file into benchmark code.
gen_bench.py has two modes:
- (default) generate Android.bp and source files
- with
--ninja: generate a build.ninja instead, and build a set of ELF file outputs