Memory Migration on Next-Touch
GOGLIN, Brice
Laboratoire Bordelais de Recherche en Informatique [LaBRI]
Efficient runtime systems for parallel architectures [RUNTIME]
Laboratoire Bordelais de Recherche en Informatique [LaBRI]
Efficient runtime systems for parallel architectures [RUNTIME]
FURMENTO, Nathalie
Laboratoire Bordelais de Recherche en Informatique [LaBRI]
Efficient runtime systems for parallel architectures [RUNTIME]
Laboratoire Bordelais de Recherche en Informatique [LaBRI]
Efficient runtime systems for parallel architectures [RUNTIME]
GOGLIN, Brice
Laboratoire Bordelais de Recherche en Informatique [LaBRI]
Efficient runtime systems for parallel architectures [RUNTIME]
Laboratoire Bordelais de Recherche en Informatique [LaBRI]
Efficient runtime systems for parallel architectures [RUNTIME]
FURMENTO, Nathalie
Laboratoire Bordelais de Recherche en Informatique [LaBRI]
Efficient runtime systems for parallel architectures [RUNTIME]
< Réduire
Laboratoire Bordelais de Recherche en Informatique [LaBRI]
Efficient runtime systems for parallel architectures [RUNTIME]
Langue
en
Communication dans un congrès
Ce document a été publié dans
Linux Symposium, 2009-07-15, Montreal. 2009
Résumé en anglais
NUMA abilities such as explicit migration of memory buffers enable flexible placement of data buffers at runtime near the tasks that actually access them. The move_pages system call may be invoked manually but it achieves ...Lire la suite >
NUMA abilities such as explicit migration of memory buffers enable flexible placement of data buffers at runtime near the tasks that actually access them. The move_pages system call may be invoked manually but it achieves limited throughput and implies a strong collaboration of the application. Indeed, the location of threads and their memory access patterns must be carefully known so as to decide when migrating the right memory buffer on time. We present the implementation of a Next-Touch memory placement policy so as to enable automatic dynamic migration of pages when they are actually accessed by a task. We introduce a new PTE flag setup by madvise, and the corresponding Copy-on-Touch codepath in the page-fault handler which allocates the new page near the accessing task. We then look at the performance and overheads of this model and compare it to using the move_pages system call.< Réduire
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