Benchmark

This is a simple LD_PRELOAD trick that can be used to benchmark a program.

Compilation

Run maike, or compile benchmark.cpp as a shared library. Required linker flags can be found at the beginning of that file. The wrapper script benchmark can be used to launch the process that should be benchmark. The shared library benchmark.so must be in the same directory as that script.

maike
sudo cp __targets/benchmark.so /usr/local/bin
sudo cp benchmark /usr/local/bin
sudo chmod o+x /usr/local/bin/benchmark

Usage

Benchmarking is now simple:

benchmark *command*

The output is written to stderr and looks similar to this

# Processing time in seconds for 8971

Self (user / kernel):     0.024 / 0.015
Children (user / kernel): 2.745 / 0.233
Wallclock (total):        3.205

PID 8971 spent 24 ms in its own algorithms, 15 ms in kernel, while it took 2.745 seconds to run the algorithms inside the child processes, and they spent 0.233 seconds in kernel. The total execution time including waiting for I/O was 3.205 seconds.