Abstract: An MPI Library implementing Direct Communication for Many-Core Based Accelerators

Author

Min Si ; Ishikawa, Yozo

Author_Institution

Dept. of Comput. Sci., Univ. of Tokyo, Tokyo, Japan

fYear

2012

fDate

10-16 Nov. 2012

Firstpage

1527

Lastpage

1528

Abstract

DCFA-MPI is an MPI library implementation for manycore-based clusters, whose compute node consists of Intel MIC (Many Integrated Core) connected to the host via PCI Express with InfiniBand. DCFA-MPI enables direct data transfer between MIC units without the host assist. MPI_Init and MPI_Finalize functions are offloaded to the host side in order to initialize the InfiniBand HCA and inform its PCI-Express address to MIC. MPI communication primitives executed in MIC may transfer data directly to other MICs or hosts by issuing commands to HCA. The implementation is based on the Mellanox InfiniBand HCA and Intel´s Knights Ferry, and compared with the Intel MPI + offload mode. Preliminary results show that DCFA-MPI outperforms the Intel MPI + offload mode by 1.12 ~ 5 times.

Keywords

application program interfaces; message passing; multiprocessing systems; DCFA-MPI; Intel MIC; Intel MPI; MPI communication primitives; MPI library; Mellanox InfiniBand HCA; PCI Express; direct communication; direct data transfer; many core based accelerators; manycore-based clusters; accelerator; coprocessor; direct communication; infiniband; many-core; mpi; xeon phi;

fLanguage

English

Publisher

ieee

Conference_Titel

High Performance Computing, Networking, Storage and Analysis (SCC), 2012 SC Companion:

Conference_Location

Salt Lake City, UT

Print_ISBN

978-1-4673-6218-4

Type

conf

DOI

10.1109/SC.Companion.2012.342

Filename

6496088