UCX main features¶
High-level API features¶
Select either a client/server connection establishment (similar to TCP), or connect directly by passing remote address blob.
Support sharing resources between threads, or allocating dedicated resources per thread.
Event-driven or polling-driven progress.
Java and Python bindings.
Seamless handling of GPU memory.
Stream-oriented send/receive operations.
Remote memory access.
Remote atomic operations.
Shared memory (CMA, knem, xpmem, SysV, mmap)
Cray Gemini / Aries (ugni)
Supported architectures: x86_64, Arm v8, Power.
Runs on virtual machines (using SRIOV) and containers (docker, singularity).
Can utilize either MLNX_OFED or Inbox RDMA drivers.
Tested on major Linux distributions (RedHat/Ubuntu/SLES).
Cuda (for NVIDIA GPUs)
ROCm (for AMD GPUs)
Protocols, Optimizations and Advanced Features¶
Automatic selection of best transports and devices.
Zero-copy with registration cache.
Scalable flow control algorithms.
Optimized memory pools.
Accelerated direct-verbs transport for Mellanox devices.
Pipeline protocols for GPU memory
QoS and traffic isolation for RDMA transports
Platform (micro-architecture) specific optimizations (such as memcpy, memory barriers, etc.)
Multi-rail and RoCE link aggregation group support
Bare-metal, containers and cloud environments support
Advanced protocols for transfer messages of different sizes