The RDMA performance micro-benchmark suite (`perftest`) consists of command-line executables that measure bandwidth and latency for InfiniBand/RoCE verbs (SEND, WRITE, READ, ATOMIC) over multiple transport types (RC, UD, Raw Ethernet, etc.). The architecture follows a client-server model: parameters are negotiated via a TCP control channel, then RDMA transfers are executed, and results (bandwidth, latency percentiles, CPU utilization) are reported. The codebase is structured around shared modules in the `src/` directory: `libperftest.a` containing connection setup (`perftest_communication.c`), resource management (`perftest_resources.c`), CLI parsing (`perftest_parameters.c`), and data validation (`host_validation.c`). Memory backends (host, CUDA, ROCm, etc.) are abstracted through a vtable interface, and the negotiation protocol supports both legacy and key-value version. While not a data pipeline, the benchmarking methodology is rigorous. The code is professionally crafted but shows signs of long evolution: large monolithic files, extensive `#ifdef` gating, and manually maintained vendor-specific tables.