Gregory-Meyer / shared

Toy application to load and benchmark shared (dynamic) libraries on POSIX systems.

shared

Abstract

Using the POSIX library functions in <dlfcn.h>, dynamic libraries can be loaded and symbols linked against at runtime. Combined with a little hand-rolled vtable trickery, this can be used to dynamically load the implementation of a type at runtime.

Sample output of bench_vec_wrapper

2019-02-12 17:05:33
Running ./bench_vec_wrapper
Run on (4 X 4000 MHz CPU s)
CPU Caches:
  L1 Data 32K (x2)
  L1 Instruction 32K (x2)
  L2 Unified 256K (x2)
  L3 Unified 4096K (x1)
***WARNING*** CPU scaling is enabled, the benchmark real time measurements may be noisy and will incur extra overhead.
-----------------------------------------------------------
Benchmark                    Time           CPU Iterations
-----------------------------------------------------------
bm_push_back_c              11 ns         11 ns   60805741
bm_push_back_cxx            13 ns         13 ns   50425440
bm_push_back_stdlib          4 ns          4 ns  193705113