From 3faf76c16082ee7cd3f58eec3bd696752196368d Mon Sep 17 00:00:00 2001 From: Carl Pearson Date: Mon, 15 Feb 2021 10:03:35 -0700 Subject: [PATCH] UNM PSAAP talk --- content/talk/20210219_unm_psaap/index.md | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 content/talk/20210219_unm_psaap/index.md diff --git a/content/talk/20210219_unm_psaap/index.md b/content/talk/20210219_unm_psaap/index.md new file mode 100644 index 0000000..603acaa --- /dev/null +++ b/content/talk/20210219_unm_psaap/index.md @@ -0,0 +1,22 @@ +--- +title: Adding Fast GPU Derived Datatype Handing to Existing MPIs + +date: "2021-02-15T00:00:00Z" + +tags: [mpi] +--- + +*February 19th, 1:00 PM, University of New Mexico, Albuquerque, NM* + +Invited talk to the PSAAP Colloquium at University of New Mexico Computer Science + +### Abstract + +MPI derived datatypes are an abstraction that simplifies handling of non-contiguous data in MPI applications. These datatypes are recursively constructed at runtime from primitive Named Types defined in the MPI standard. More recently, the development and deployment of CUDA-aware MPI implementations has encouraged the transition of distributed high-performance MPI codes to use GPUs. Such implementations allow MPI functions to directly operate on GPU buffers, easing integration of GPU compute into MPI codes. Despite substantial attention to CUDA-aware MPI implementations, they continue to offer cripplingly poor GPU performance when manipulating derived datatypes on GPUs. This work presents a new MPI library, TEMPI, to address this issue. TEMPI first introduces a common datatype to represent equivalent MPI derived datatypes. TEMPI can be used as an interposed library on existing MPI deployments without system or application changes. Furthermore, this work presents a performance model of GPU derived datatype handling, demonstrating that previously preferred “one-shot” methods are not always fastest. + +### Link + +* [slides]() +* [github](https://github.com/cwpearson/tempi) +* [pdf](/pdf/20210121_pearson_arxiv.pdf) +* [arxiv](https://arxiv.org/abs/2012.14363) \ No newline at end of file