This document discusses the benefits and technologies of cloud computing. It notes that cloud computing provides utilities over the internet, does not require software installation, allows for online development and access from any platform. It is highly cost effective and reliable. The document also discusses technologies that enable distributed computing systems like scalable computing using hardware, software and network technologies. It describes multicore CPUs and multithreading, advances in CPU processors moving to multicore architectures, and both multicore CPUs and many-core GPUs to handle multiple instruction threads.

1. Cloud Computing
Dr.J.Kalavathi
Assistant Professor of Information Technology
V.V.Vanniaperumal College for Women

2. Benefits of Cloud Computing
 Utilities, over the internet
Manipulate and configure the applications
Does not require to install
Online development and deployment tools, programming environment through Platform as a
Service Model.
 available over the network and platform independent access.
 on-demand self-service
Highly cost effective
More reliable

3. Benefits of Cloud Computing

4. Technologies for Network –Based System
 scalable computing ,it’s time to explore hardware, software, and network
technologies for distributed computing system design and applications.
In particular, we will focus on viable approaches to building distributed operating
systems for handling massive parallelism in a distributed environment.

5. Multicore CPUs and Multithreadin
g Technologies
A multicore processor is a single computing component comprised of two
or more CPUs that read and execute the actual program instructions.
They are crucial to the development of HPC and HTC systems.
processor speed is measured in millions of instructions per second (MIPS) a
nd network bandwidth is measured in megabits per second (Mbps) or gigabits
per second (Gbps). The unit GE refers to 1 Gbps Ethernet bandwidth.

7. Advances in CPU Processors
advanced CPUs or microprocessor chips assume a multicore architecture with
dual, quad, six, or more processing cores.
Processor speed growth is plotted in the upper curve
CMOS-based chips due to power limitations.
 This limitation is attributed primarily to excessive heat generation with high fre
quency or high voltages. The ILP is highly exploited in modern CPU processors.
ILP mechanisms include multiple-issue superscalar architecture, dynamic bran
ch prediction, and speculative execution, among others.
These ILP techniques demand hardware and compiler support.
Both multi-core CPU and many-core GPU processors can handle multiple instr
uction threads at different magnitudes

9. Multicore CPU and Many-Core GP
U Architectures
Multicore CPUs may increase from the tens of cores to hundreds .
The CPU has reached its limit in terms of exploiting massive DLP due to the afore
mentioned memory wall problem.
Both IA-32 and IA-64 instruction set architectures are built into commercial CPUs
x-86 processors have been extended to serve HPC and HTC systems in some hi
gh-end server processors.
Many RISC processors have been replaced with multicore x-86 processors and m
any-core GPUs in the Top 500 systems
The processor industry is also keen to develop asymmetric or heterogeneous chip
mul-tiprocessors that can house both fat CPU cores and thin GPU cores on the sam
e chip.

10. Multithreading Technology

12. 4-pipelined data paths
Four issue superscalar processor -
Fine-grain multithreaded processor
Coarse grain multithreaded processor
Dual core 2-CMP Processor
Simultaneous Multithreaded (SMT) Processor