scholarly journals Back to the Past: When Segmentation Is More Efficient Than Paging

2018 ◽  
Author(s):  
Lauri P. Laux Jr ◽  
Roberto A. Hexsel
Keyword(s):  
Virtual Memory ◽  
Memory Systems ◽  
Scarce Resources ◽  
The Past ◽  
Execution Traces ◽  
Page Table

Virtual Memory was devised in a time of scarce resources. In the coming decade we expect to see physical memory systems populated with 264 bytes of RAM, a fraction of which may be non-volatile. Demand paging is inefficient in such large memories because space (Page Tables) and time (Page Table walks) overheads are too high. We collected execution traces from six applications and characterized their virtual memory behavior with respect to miss rates in references to Translation Buffers (TLBs) and Segment Buffers (SBs). Our measurements indicate that the miss rates for SBs are 2-3 orders of magnitude smaller than for TLBs. In light of these results, we discuss some of the design implications of segmented systems and of SBs.

scholarly journals Dynamically remembered present: Virtual memory as a basis for the stories we live

2013 ◽  
Vol 69 (1) ◽  
Author(s):  
Cornelius W. Du Toit
Keyword(s):  
Literary History ◽  
Life Stories ◽  
Human Life ◽  
Living Organism ◽  
Virtual Memory ◽  
Historical Research ◽  
Human Consciousness ◽  
The Past ◽  
The Universe

In this article memory was viewed as a crucial key to the discovery of reality. It is the basis of historical research at all levels, hence it is not confined to a function of human consciousness (brain operations): its physical vestiges are discernible in the universe, in fossils, in the DNA of species. Memory inscribes information in various ways. On a human level it is not recalled computer-wise: imagination, emotion and tacit motives play a role in how we remember. The article investigated the way in which memory underlies the operation of every cell in any living organism. Against this background the role of memory in humans and its decisive influence on every level of human life are examined. Gerald Edelman’s work in this regard was considered. Marcel Proust’s focus on memory is an underlying thread running through his novels, unrivalled in literary history. Some prominent examples were analysed in this article. In light of the foregoing the role of memory in religious experience was then discussed. The virtuality of memory is encapsulated in the statement that we remember the present whilst reliving the past. Memory characterised by virtuality is basic to our autobiographic narratives. The nature of memory determines our life stories, hence our perception of the human self as dynamically variable and open to the future.

A Scene-Based Episodic Memory System for a Simulated Autonomous Creature

2013 ◽  
Vol 4 (1) ◽  
pp. 32-64 ◽  
Author(s):  
Elisa C. Castro ◽  
Ricardo R. Gudwin
Keyword(s):  
Episodic Memory ◽  
Navigation System ◽  
Cognitive Architecture ◽  
Human Memory ◽  
Memory Systems ◽  
Memory Module ◽  
The Past ◽  
3D Environment ◽  
Main Ideas

In this paper the authors present the development of a scene-based episodic memory module for the cognitive architecture controlling an autonomous virtual creature, in a simulated 3D environment. The scene-based episodic memory has the role of improving the creature’s navigation system, by evoking the objects to be considered in planning, according to episodic remembrance of earlier scenes testified by the creature where these objects were present in the past. They introduce the main background on human memory systems and episodic memory study, and provide the main ideas behind the experiment.

A framework for application guidance in virtual memory systems

2013 ◽  
Author(s):  
Michael R. Jantz ◽  
Carl Strickland ◽  
Karthik Kumar ◽  
Martin Dimitrov ◽  
Kshitij A. Doshi
Keyword(s):  
Virtual Memory ◽  
Memory Systems

Understanding application performance on shared virtual memory systems

1996 ◽  
Vol 24 (2) ◽  
pp. 122-133 ◽  
Author(s):  
Liviu Iftode ◽  
Jaswinder Pal Singh ◽  
Kai Li
Keyword(s):  
Virtual Memory ◽  
Memory Systems ◽  
Application Performance ◽  
Shared Virtual Memory

Dynamic Improvement of Locality in Virtual Memory Systems

1976 ◽  
Vol SE-2 (1) ◽  
pp. 54-62 ◽  
Author(s):  
J.-L. Baier ◽  
G.R. Sager
Keyword(s):  
Virtual Memory ◽  
Memory Systems
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