Blocs nuls dans la hiérarchie mémoire

Julien Dusser 1
1 ALF - Amdahl's Law is Forever
Inria Rennes – Bretagne Atlantique , IRISA-D3 - ARCHITECTURE
Abstract : The memory hierarchy undergoes a growing pressure. This pressure has been due to the increasing frequency of the processors. However, now that the frequency stays around 3 GHz, the number of execution cores and thus the number of processes running simultaneously are increasing. The growing number of requests handled by the memory hierarchy leads to bandwidth saturation. This study shows that the memory hierarchy is often used to transport null data blocks. These trivial value blocks are particularly numerous in the last level cache and in the main memory. We propose in this thesis to use the Zero-Content Augmented Cache, a cache specialized in the management of these null blocks. It consists of a traditional cache and a cache dedicated to null blocks. This proposal allows increasing overall system performance and significantly reducing memory bandwidth usage. In this document, we also propose the Decoupled Zero-Compressed Memory, a compressed memory architecture also using the null blocks. This compressed memory can store a working-set greater than the size of the physical memory, and thus significantly reduce the number of accesses to the mass storage devices.
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https://tel.archives-ouvertes.fr/tel-00557080
Contributor : Julien Dusser <>
Submitted on : Tuesday, January 18, 2011 - 2:41:31 PM
Last modification on : Friday, November 16, 2018 - 1:40:25 AM
Long-term archiving on : Tuesday, April 19, 2011 - 3:10:16 AM

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  • HAL Id : tel-00557080, version 1

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Julien Dusser. Blocs nuls dans la hiérarchie mémoire. Réseaux et télécommunications [cs.NI]. Université Rennes 1, 2010. Français. ⟨tel-00557080⟩

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