memkind March 2017

memkind@lists.01.org

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default memory placement in MCDRAM with explicit placement of select objects in DDR

by Romero, Nichols A.

Hi, I am working with some collaborators at Intel to understand the memory bandwidth behavior of a science app. I perform the follow computational experiment. By default, data structures go into DDR and select data structures go into MCDRAM (by using hbw_malloc). However, the inverse experiment does not seem (trivially) possible with the memkind API. By default, data structures go into MCDRAM and select data structures go into DDR (by using memkind_malloc). Here: http://memkind.github.io/memkind/man_pages/memkind.html#KINDS MEMKIND_DEFAULT actually means default memory as specified by numactl, i.e. “standard memory” does not mean DDR. -- Nichols A. Romero, Ph.D. Argonne Leadership Computing Facility Argonne National Laboratory Building 240 Room 2-127 9700 South Cass Avenue Argonne, IL 60490 (630) 252-3441

5 years, 3 months

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memkind March 2017