Sparse matrix vector product (SpMV) is the key component of sparse linear solvers. This presentation talks about the communication time reduction of SpMV. Recently, HPC applications are often executed with thousands of processes. Especially when we consider strong scaling setup, communication time reduction is one of the most important aspect for developing parallel software. FX10 system has the RDMA (Remote Direct Memory Access) interface which allows users to use the direct RDMA communication for each application. This presentation evaluates the direct RDMA routines for SpMV halo communication and its impact on sparse linear solvers.