PPT-Controlling Process/Thread

Placement on Zeus Raghu Reddy RaghuReddynoaagov NCEP MTT Meeting 1 9212012 Placement example GFS T574 case with 241 MPI ranks Nodes121 PPN2 NUMTHD5 2 cores left idle Artificial example to illustrate the problem . A. Contaminants – microbes present at a given place and time that is undesirable. B. Decontamination – the removal or destruction of contaminants. C. Terminology. 1. Sterilization. A) Process that removes all viable microorganisms including viruses & endospores. CSCI 201L. Jeffrey Miller, Ph.D.. http. ://www-scf.usc.edu/~csci201. USC CSCI 201L. Outline. USC CSCI 201L. 2. /6. Thread . Pools. Thread Pool Overview. If you need to create a lot of threads, it may not be the most efficient to create them by instantiating them all as threads and starting them. CSCI 201L. Jeffrey Miller, Ph.D.. http://www-scf.usc.edu/~csci201. USC CSCI 201L. Outline. USC CSCI 201L. 2. /10. Thread Methods. Program. Thread. Class. USC CSCI 201L. 3. /10. Thread Methods. Creating and Starting Threads. Overview. Thread scheduling. Thread and context switch. Thread creation and termination. Kernel threads vs. user threads. 2. Overview of Threads. A thread is . an independent stream . of . instructions. Chapter 4. 2. Outline. Threads. Symmetric Multiprocessing (SMP). Microkernel. Linux Threads. 3. Process Characteristics. Unit of resource ownership. - process is allocated:. a virtual address space to hold the process image. Jeff Chase. Duke University. Recap: threads on the metal. An OS implements . synchronization objects . using a combination of elements:. Basic . sleep. /. wakeup. primitives of some form.. Sleep. places the thread TCB on a . A. Contaminants – microbes present at a given place and time that is undesirable. B. Decontamination – the removal or destruction of contaminants. C. Terminology. 1. Sterilization. A) Process that removes all viable microorganisms including viruses & endospores. : . Exploiting Differences in Memory Access Behavior. Yoongu Kim. Michael Papamichael. Onur Mutlu. Mor Harchol-Balter. Motivation. Memory is a shared resource. Threads’ requests contend for memory. Command Object. In . this program . the command object . is . AnImageAnimationCommand. A . command objects implements . Runnable. Contains method run(). Thread need . an . instance . of it to . do work. Thread. Thread NPTL thread library commands. Thread Safety. Thread libraries. Threading issues. Linux Threads. 4 Reasons for threads. Express logically concurrent tasks. Run work in the background. Exploit multiple processors. Pin vs. Needle. Pins have Heads. Needles have an Eye. Safety. Both Pins & Needles are SHARP! . Safe classroom environment . Safe personal environment. Respect materials. Listen to directions . OUCH!!!. Dynamic Thread Mapping for High-Performance, Power-Efficient Heterogeneous Many-core Systems Guangshuo Liu Jinpyo Park Diana Marculescu Presented By Ravi Teja Arrabolu (vxa132930) Introduction x0000A thread has no way to access the value of another threadx0000Type safe Thread Local Storage in POCO is implemented by the PocoThreadLocal class templatex0000include Poco/ThreadLocalhx0000PocoThr 15-213 / 18-213: Introduction to Computer Systems. 26. th. Lecture, Dec. 1, 2011. Instructors:. . Dave O’Hallaron, Greg Ganger, and Greg . Kesden. Today. Thread safety. Parallel . Computing Hardware.