One-Sided Append: A New Communication Paradigm For PGAS Models

One-sided append represents a new class of one-sided operations that can be used to aggregate messages from multiple communication sources into a single destination buffer. This new communication paradigm is analyzed in terms of its impact on the OpenSHMEM parallel programming model and applications. Implementation considerations are discussed and an accelerated implementation using the Portals 4 networking API is presented. Initial experimental results with the NAS integer sort benchmark indicate that this new operation can significantly improve the communication performance of such applications.