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.
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.
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:
--ninja: generate a build.ninja instead, and build a set of ELF file outputs