The document discusses different types of parallel computer architectures, including shared-memory multiprocessors. It describes taxonomy of parallel computers including SISD, SIMD, MISD, and MIMD models. For shared-memory multiprocessors, it outlines consistency models including strict, sequential, processor, weak and release consistency. It also discusses UMA and NUMA architectures, cache coherence protocols like MESI, and examples of multiprocessors using crossbar switches or multistage networks.
Multiprocessor system is an interconnection of two or more CPUs with memory and input-output equipment
The components that forms multiprocessor are CPUs IOPs connected to input –output devices , and memory unit that may be partitioned into a number of separate modules.
Multiprocessor are classified as multiple instruction stream, multiple data stream (MIMD) system.
There are two primary forms of data exchange between parallel tasks - accessing a shared data space and exchanging messages.
Message passing refers to a means of communication between
different threads within a process
different processes running on the same node
different processes running on different nodes
When messages are passed between two different processes we speak of inter-process communication, or IPC.
Message passing can be used as a more process-oriented approach to synchronization than the "data-oriented" approaches used in providing mutual exclusion for shared resources.
The two main dimensions
Synchronous vs. asynchronous
Symmetric or asymmetric process/thread naming
Audio Version available in YouTube Link : https://www.youtube.com/AKSHARAM?sub_confirmation=1
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Computer Architecture and Organization
V semester
Anna University
By
Babu M, Assistant Professor
Department of ECE
RMK College of Engineering and Technology
Chennai
IT IS ABOUT MULTIPROCESSING,COMMUNICATION BETWEEN THE PROCESS THROUGH MESSAGE PASSING AND SHARED MEMORY.SYNCHRONIZATION MECHANISM AND SYNCHRONIZATION USING SEMAPHORE
System Interconnect Architectures,Network Properties and Routing,Linear Array,
Ring and Chordal Ring,
Barrel Shifter,
Tree and Star,
Fat Tree,
Mesh and Torus,Dynamic InterConnection Networks,Dynamic bus ,Switch Modules
,Multistage Networks,Omega Network,Baseline Network,Crossbar Networks
Multiprocessor system is an interconnection of two or more CPUs with memory and input-output equipment
The components that forms multiprocessor are CPUs IOPs connected to input –output devices , and memory unit that may be partitioned into a number of separate modules.
Multiprocessor are classified as multiple instruction stream, multiple data stream (MIMD) system.
There are two primary forms of data exchange between parallel tasks - accessing a shared data space and exchanging messages.
Message passing refers to a means of communication between
different threads within a process
different processes running on the same node
different processes running on different nodes
When messages are passed between two different processes we speak of inter-process communication, or IPC.
Message passing can be used as a more process-oriented approach to synchronization than the "data-oriented" approaches used in providing mutual exclusion for shared resources.
The two main dimensions
Synchronous vs. asynchronous
Symmetric or asymmetric process/thread naming
Audio Version available in YouTube Link : https://www.youtube.com/AKSHARAM?sub_confirmation=1
subscribe the channel
Computer Architecture and Organization
V semester
Anna University
By
Babu M, Assistant Professor
Department of ECE
RMK College of Engineering and Technology
Chennai
IT IS ABOUT MULTIPROCESSING,COMMUNICATION BETWEEN THE PROCESS THROUGH MESSAGE PASSING AND SHARED MEMORY.SYNCHRONIZATION MECHANISM AND SYNCHRONIZATION USING SEMAPHORE
System Interconnect Architectures,Network Properties and Routing,Linear Array,
Ring and Chordal Ring,
Barrel Shifter,
Tree and Star,
Fat Tree,
Mesh and Torus,Dynamic InterConnection Networks,Dynamic bus ,Switch Modules
,Multistage Networks,Omega Network,Baseline Network,Crossbar Networks
Coherence and consistency models in multiprocessor architectureUniversity of Pisa
Cache coherence and consistency model in multiprocessor architecture. These slide show the introduction of multiprocessor and cache multilevel and then describe the basic mechanism of coherence and consistency protocols. In particular the protocols describe are the following: snooping and directory protocols for the coherence part and sequential protocol for the consistency part. There are also example of (in)consistency and (in)coherence.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
1. Scuola Politecnica
Dipartimento di Ingegneria Chimica,
Gestionale, Informatica, Meccanica
Parallel Computer Architectures
Shared-Memory Multiprocessors
Architetture Avanzate dei Calcolatori
Salvatore La Bua
2. S. La Bua - DICGIM/UniPA Architetture Avanzate dei Calcolatori
2
Shared Memory Multiprocessors
Multiprocessors Multicomputers
3. S. La Bua - DICGIM/UniPA Architetture Avanzate dei Calcolatori
3
Taxonomy of Parallel Computers
● SISD
– Single Instruction, Single Data
● Von Neumann architecture
● SIMD
– Single Instruction, Multiple Data
● Vector and Array processor architectures
● MISD
– Multiple Instruction, Single Data
● MIMD
– Multiple Instruction, Multiple Data
● Multiprocessor architectures: UMA, NUMA, COMA
● Multicomputer architectures: MPP, COW
4. S. La Bua - DICGIM/UniPA Architetture Avanzate dei Calcolatori
4
Memory Semantics:
Consistency models
● Strict consistency
– Any read to a location x always returns the value of the most recent
write to x
● Sequential consistency
– For multiple read and write requests, some interleaving is chosen
– All CPUs see the same order
● Processor consistency
– Writes by any CPU are seen by all in the order they were issued
– For every memory word, all CPUs see writes to it in the same order
● Weak consistency
– Does not guarantee that writes from a single CPU are seen in order
● Release consistency
– An improvement to the weak consistency model
5. S. La Bua - DICGIM/UniPA Architetture Avanzate dei Calcolatori
5
UMA Symmetric
Multiprocessor Architectures
● Uniform Memory Access
● Snooping Caches
● Coherence protocols
– Write-through
– Write-allocate
– Write-back
6. S. La Bua - DICGIM/UniPA Architetture Avanzate dei Calcolatori
6
MESI Cache Coherence
Protocol
● MESI: Modified-Exclusive-Shared-Invalid
– A write-back protocol
● Four statuses each cache entry can be in:
– Invalid
● The cache entry does not contain valid data
– Shared
● Multiple caches may hold the line
● Memory is up to date
– Exclusive
● No other cache holds the line
● Memory is up to date
– Modified
● The entry is valid
● Memory is invalid
● No copies exist
7. S. La Bua - DICGIM/UniPA Architetture Avanzate dei Calcolatori
7
UMA Multiprocessors
Using Crossbar
Switches
Using Multistage
Switching Networks
8. S. La Bua - DICGIM/UniPA Architetture Avanzate dei Calcolatori
8
NUMA Multiprocessors
●
Non-Uniform Memory Access
– Single address space visible to all CPUs
– Access to remote memory done using LOAD and STORE instructions
– Access to remote memory is slower than access to local memory
●
NC-NUMA
– Non Cache coherent NUMA
● CC-NUMA
– Cache Coherent NUMA
9. S. La Bua - DICGIM/UniPA Architetture Avanzate dei Calcolatori
9
Sun Fire E25K NUMA
Multiprocessor
● An example of a shared-memory
NUMA multiprocessor
10. S. La Bua - DICGIM/UniPA Architetture Avanzate dei Calcolatori
10
COMA Multiprocessors
● Cache Only Memory Access
– Use each CPU’s main memory as a cache
– Physical address space split into cache lines
● Problems:
– How are cache lines located?
● Main memory or actual cache
– When a line is purged, what happens if it is the last copy?
● Last copy cannot be thrown out