Introduction to Integer, Char, and Float Data Types
A Case for Richer Cross-layer Abstractions:
Bridging the Semantic Gap with
Expressive Memory
Nandita Vijaykumar
Abhilasha Jain, Diptesh Majumdar, Kevin Hsieh, Gennady Pekhimenko
Eiman Ebrahimi, Nastaran Hajinazar, Phillip B. Gibbons, Onur Mutlu
ISA
Virtual Memory
2
Applications
Hardware
Today’s cross-layer abstractions are designed
to primarily convey functionality,
not to aid performance optimization
Data Structures
Code Optimizations
Access Patterns
Integer
Float
Char
Data Type
Instructions
Memory Addresses
The narrow abstractions lose key information
3
100011111…
101010011…
Caches
Memory
Controller
Prefetcher
Consequence 1: The Hardware Approach
We design hardware to
infer
and
predict
program behavior
to optimize for performance
4
•
Performance on the
table
Cache space
available?
How many DRAM
banks?
Hardware
optimizations?
Consequence 2: The Software Approach
Software is tuned to the
specifics
of hardware architecture
when optimizing for performance
5
•
Programmability
•
Portability
Time for a richer interface
between hardware and software?
6
With growing HW/SW sophistication,
traditional interfaces limit optimization effectiveness
ISA
Virtual Memory
7
Expressive
Memory
“XMem”
Higher-level
Program
Semantics
A fresh approach to traditional optimizations
Cache
Management
Data
Placement
in
DRAM
Data
Compression
Approximation
DRAM
Cache
Management
NVM
Management
NUCA
/
NUMA
Optimizations
….
8
Programmability
Portability
Resource Efficiency
A Case for Richer Cross-layer Abstractions:
Bridging the Semantic Gap with
Expressive Memory
Nandita Vijaykumar
Abhilasha Jain, Diptesh Majumdar, Kevin Hsieh, Gennady Pekhimenko
Eiman Ebrahimi, Nastaran Hajinazar, Phillip B. Gibbons, Onur Mutlu
This content introduces the fundamental data types in programming - Integer, Char, and Float. It includes binary representations, images, and related slides. Explore the characteristics and usage of these data types in programming.
Download Presentation
Please find below an Image/Link to download the presentation.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author.If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.
You are allowed to download the files provided on this website for personal or commercial use, subject to the condition that they are used lawfully. All files are the property of their respective owners.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author.
E N D
Presentation Transcript
Integer Char Float 100011111 101010011
