rdmatop is a terminal-based monitoring application for Remote Direct Memory Access (RDMA) network interfaces on Linux.
RDMA allows applications to transfer data between computers with relatively little CPU involvement. It is widely used in high-performance computing, GPU clusters and other systems where network latency and throughput are particularly important.
rdmatop provides a live view of RDMA device activity, presenting hardware counters and performance measurements in an interface inspired by htop.
The program obtains information through the Linux RDMA netlink subsystem rather than relying on monitoring interfaces specific to a particular network adapter manufacturer.
It is especially useful for administrators diagnosing performance problems involving InfiniBand, RDMA over Converged Ethernet (RoCE) and other RDMA-capable network technologies.
This is free and open source software.
Key Features
- Real-time monitoring of RDMA network devices and ports.
- Displays transmit and receive throughput in Gbps.
- Reports packet transmission and reception rates.
- Monitors packet drops and retransmission counters.
- Displays RDMA read and write operations.
- Maps RDMA queue pairs to their owning processes.
- Uses Linux RDMA netlink interfaces for device discovery and statistics.
- Combines device counters with process information from /proc.
- Provides device health indicators and event information.
- Calculates traffic rates from successive hardware counter measurements.
- Supports monitoring compatible InfiniBand, RoCE and AWS EFA devices.
- Can record throughput and packet-rate measurements to Chrome JSON traces.
- Recorded traces can be examined using Perfetto.
- Useful for monitoring communication workloads using NCCL, UCX, NVSHMEM and related technologies.
Website: github.com/uccl-project/rdmatop
Support:
Developer: Chang-Ning Tsai and the UCCL Team
License: Apache License 2.0
rdmatop is written in Rust. Learn Rust with our recommended free books and free tutorials.
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