Computer Science – Hardware Architecture
Scientific paper
2003-10-30
Computer Science
Hardware Architecture
12 pages, 17 figures
Scientific paper
For several years, MPI has been the de facto standard for writing parallel applications. One of the most popular MPI implementations is MPICH. Its successor, MPICH2, features a completely new design that provides more performance and flexibility. To ensure portability, it has a hierarchical structure based on which porting can be done at different levels. In this paper, we present our experiences designing and implementing MPICH2 over InfiniBand. Because of its high performance and open standard, InfiniBand is gaining popularity in the area of high-performance computing. Our study focuses on optimizing the performance of MPI-1 functions in MPICH2. One of our objectives is to exploit Remote Direct Memory Access (RDMA) in Infiniband to achieve high performance. We have based our design on the RDMA Channel interface provided by MPICH2, which encapsulates architecture-dependent communication functionalities into a very small set of functions. Starting with a basic design, we apply different optimizations and also propose a zero-copy-based design. We characterize the impact of our optimizations and designs using microbenchmarks. We have also performed an application-level evaluation using the NAS Parallel Benchmarks. Our optimized MPICH2 implementation achieves 7.6 $\mu$s latency and 857 MB/s bandwidth, which are close to the raw performance of the underlying InfiniBand layer. Our study shows that the RDMA Channel interface in MPICH2 provides a simple, yet powerful, abstraction that enables implementations with high performance by exploiting RDMA operations in InfiniBand. To the best of our knowledge, this is the first high-performance design and implementation of MPICH2 on InfiniBand using RDMA support.
Ashton David
Buntinas Darius
Gropp William
Jiang Weihang
Liu Jiuxing
No associations
LandOfFree
Design and Implementation of MPICH2 over InfiniBand with RDMA Support does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Design and Implementation of MPICH2 over InfiniBand with RDMA Support, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Design and Implementation of MPICH2 over InfiniBand with RDMA Support will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-250602