RDMA read/write throughput

A benchmark to measure throughput of outbound RDMA reads or writes.

Important parameters

These parameters are defined in main.c, run-servers.sh, and run-machine.sh.

1. Client-server configuration

• num_server_threads: Number of worker threads at the server machine
• num_threads: Number of client threads at each client machine

2. RDMA optimizations

• postlist: Number of SENDs issued by a server using one Doorbell
• use_uc: Use UC transport for RDMA writes
• NUM_QPS: Number of QPs used by each server thread
• UNSIG_BATCH: One post_send() per UNSIG_BATCH reads/writes is signaled

Running the benchmark

1. Change HRD_REGISTRY_IP in both run-servers.sh and run-machine.sh to the server's IP address.
2. At the server machine: ./run-servers.sh
3. At client machine i of num_server_threads / num_threads client machines: ./run-machine.sh i

Connection logic

• Each client thread establishes a connections with one server thread. This is done to keep the communication fan-out at the server small.