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| | Nitesh Batra Project |
 | | Instruction level parallelism occurs when a component of an algorithm can be executed independent of the results of another component of the algorithm. | | | VLIW is successor to Reduced Instruction Set Computer (RISC). | | | Very Long Instruction Word (VLIW) is a technique for using Instruction Level Parallelism (ILP) in programs i.e execution of more than one instruction at a time. |
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http://www.wam.umd.edu/~nbatra/411proj/vliwopening.htm
(640 words)
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| | An Analysis of Computer Architectures For Exploiting Parallelism |
| | The basic idea of issuing several instructions per clock cycle is to exploit the instruction level parallelism available in the code and thus improve the performance. | | | This instruction window is large enough to hide most of the latency for refill s from the secondary cache. | | | Although there is usually always some instruction level parallelism available for exploitation in every program, most programs do not exhibit large amounts of these types of instructions. |
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http://longwood.cs.ucf.edu/~feuerbac/papers/archpara.html
(5476 words)
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| | IA-64 |
| | The ability to extract instruction level parallelism (ILP) from the instruction stream is essential to good performance in a modern CPU. | | | In computing, IA-64 (Intel Architecture-64) is a 64-bit CPU architecture developed by Intel and Hewlett-Packard for processors such as Itanium. | | | In a mainstream "out-of-order" design, a complex decoder system examines each instruction as they flow through the pipeline and sees which can be fed off to operate in parallel across the available execution units — e.g. |
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http://www.brainyencyclopedia.com/encyclopedia/i/ia/ia_64.html
(1082 words)
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| | Exploiting SuperWord Level Parallelism with Multimedia Instruction Sets |
| | ILP is the lowest level of parallelism that involves execution of multiple instructions in parallel and requires special hardware for this purpose. | | | Vector parallelism offers some respite for this problem but it can be complex and fragile and does not work for non-vectorizable loops. | | | This paper proposes an algorithm that can extract parallelism at the language level basic blocks and work with both vectorizable and non-vectorizable loops. |
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http://filebox.vt.edu/a/adatey/research/SuperWord.htm
(520 words)
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| | Instruction Level Parallelism |
| | The software pipelining optimization applies instruction scheduling to certain innermost loops, allowing instructions within a loop to "wrap around" and execute in a different iteration of the loop. | | | Say ideally, a machine takes one cycle to complete an instruction, if a 5 stage pipeline is used, a 2nd, 3rd, 4th instructions can be loaded parallely when the 1st instruction progresses, thus increasing the thoughput 5 times. | | | Scoreboard Is a technique used to schedule instruction in a CPU dynamically, i.e using a pipeline. |
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http://homepages.wmich.edu/~v2navane/parallel.html
(695 words)
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| | ELE 658 Instruction Level Parallelism |
| | Going way beyond such performance levels is the subject of our work; our latest research indicates that speedup factors in the 10's may be possible over sequentially operated machines; such speedups have been demonstrated in our initial simulations. | | | This course will survey the literature in the areas of instruction level parallelism and branch effect reduction. | | | More and more, improving uniprocessor performance depends on the exploitation of Instruction Level Parallelism (ILP), or that parallelism existing among the machine instructions of a program. |
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http://www.ele.uri.edu/Courses/ele658
(223 words)
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| | Register Pressure in Instruction Level Parallelism |
| | This is because the continuous increasing of the gap between instruction level parallelism (ILP) processor speed and memory access latency. | | | Instruction Level Parallelism, Register Allocation, Register Saturation, Register Requirement, Register Sufficiency, Software Pipelining, Integer Linear Programming, Code Optimization, Optimizing Compilation. | | | We assume a generic architecture model so that it matches current ILP processors. |
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http://www.prism.uvsq.fr/~touati/thesis.html
(395 words)
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| | Euro-Par 2002 - Parallel Computer Architecture and Instruction Level Parallelism |
| | The scope of this topic will include (but is not limited to) parallel computer architectures, processor architecture (architecture and microarchitecture as well as compilation), the impact of emerging microprocessor architectures on parallel computer architectures, innovative memory designs to hide and reduce the access latency, multi-threading, and impact of emerging applications on parallel computer architecture design. | | | Papers are being sought on all aspects of parallel computer architecture, processor architecture and microarchitecture, including (but not limited to) the following list of topics. | | | Euro-Par 2002 - Parallel Computer Architecture and Instruction Level Parallelism |
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http://europar.upb.de/topics/topic08.html
(140 words)
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| | [No title] |
| | The pipeline may have not yet completed some instructions that are earlier in program order than the instruction causing the exception. | | | This is the foundation upon which ILP processors are built. ¡( 9 t º ª ó " ¨ Dynamic scheduling ¨l Consider the example: div.d f0,f2,f4 add.d f10,f0,f8 sub.d f12,f8,f14 Where are the data dependences? | | | These two principles together allow us to execute instructions in a different order and still maintain the program semantics. |
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http://www.cs.mtu.edu/~soner/courses/cs4431/Lecture06.ppt
(180 words)
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| | Computer Architecture |
| | Implies that instructions cannot be done in parallel or be reordered | | | Instructions with the same name but no data flow (second instruction is a write) | | | Commit: When an instruction (other then an incorrectly predicted branch) is at the top of the buffer, update state. |
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http://engr.smu.edu/~diaz/5381.fall98/notes/chapter04.html
(1687 words)
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| | Instruction Level Parallelism |
| | The average dynamic branch frequency in integer programs was measured to be about 15%, meaning that about 7 instructions execute between a pair of branches. | | | Pipelining can overlap the execution of instructions when they are independent of one another. | | | since the instructions can be evaluated in parallel. |
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http://www.cs.iastate.edu/~prabhu/Tutorial/PIPELINE/instrLevParal.html
(338 words)
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| | TechWeb - Hot Chips Trailblazes a Path to Parallelism |
| | The MIT Multi-ALU Processor (MAP) chip is designed to exploit three levels of concurrency at once: instruction, thread and task. | | | If a program is organized into multiple independent threads-sequences of instructions that do not exchange data with one another during execution-then a CPU could theoretically keep several threads loaded into its decode buffer. | | | There can be more opportunities to dispatch operations in parallel, these architects claim, if one looks at the sub-operations-the adds, shifts, loads and so on-that make up a basic machine instruction. |
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http://www.lightner.net/lightner/bruce/eet_hc97.html
(1444 words)
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| | CS 352 HW1: Superscalar Pipelines and Instruction Level Parallelism |
| | Superscalar architecture is a method of parallel computing used in many RISC processors. | | | Readings in ILP by Artur Klauser from the Dept of Computer Science at the University of Colorado http://www.cs.colorado.edu/~klauser/ilp/ | | | To successfully implement a superscalar architecture, the CPU's instruction fetching mechanism must intelligently retrieve and delegate instructions. |
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http://paintballnewbies.com/maria/cs352
(234 words)
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| | "Converting Thread-Level Parallelism to Instruction-Level Parallelism via Simultaneous Multithreading" |
| | The most compelling reason for running parallel applications on an SMT processor is its ability to use thread-level parallelism and instruction- level parallelism interchangeably. | | | Unfortunately, both parallel- processing styles statically partition processor resources, thus preventing them from adapting to dynamically-changing levels of TLP and ILP in a program. | | | Wide-issue superscalar processors exploit ILP by executing multiple instruction from a signel program in a single cycle. |
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http://www.cs.washington.edu/research/smt/papers/tlpabstract.html
(467 words)
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| | Available Technologies - Office of Technology Management |
| | The IMPACT C-compiler is a collection of over 30 software programs that generates code from user programs for several types of processors. | | | Because of this, GCC cannot run instructions in parallel nearly as efficiently as IMPACT can. | | | A well-parallelized program can run at many times the speed of a poorly parallelized program. |
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http://www.otm.uiuc.edu/techs/techdetail.asp?id=4
(548 words)
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| | Toward more advanced usage of instruction level parallelism by a very large data path processor architecture |
| | This architecture broadens the window of instruction analysis to extract 10 times of parallel gain compared with the conventional superscaler processors. | | | Toward more advanced usage of instruction level parallelism by a very large data path processor architecture | | | "Toward more advanced usage of instruction level parallelism by a very large data path processor architecture," ispan, p. |
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http://csdl2.computer.org/persagen/DLAbsToc.jsp?resourcePath=/dl/proceedings/&toc=comp/proceedings/ispan/1997/8259/00/8259toc.xml&DOI=10.1109/ISPAN.1997.645134
(224 words)
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| | An architecture for high instruction level parallelism |
| | The dataflow problems are reduced by increasing the number of functional units, registers, condition bits, by pipelining the functional units, and using nonblocking caches. | | | Data flow constraints, not inherent in the original code, arise from lack of sufficient resources for initiation and execution of multiple instructions concurrently. | | | Control flow, problems are caused by branches which force unpredictable changes in the sequential order of code execution. |
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http://csdl2.computer.org/persagen/DLAbsToc.jsp?resourcePath=/dl/proceedings/&toc=comp/proceedings/hicss/1995/6930/00/6930toc.xml&DOI=10.1109/HICSS.1995.375398
(232 words)
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| | [No title] |
| | A dead-tree version of this book is available by Addison-Wesley. | | | "The Paradyn Parallel Performance Measurement Tools", IEEE Computer 28(11), (November 1995). | | | Jerry Yan and Sekhar Sarukkai and Pankaj Mehra, "Performance Measurement, Visualization and Modeling of Parallel and Distributed Programs using the AIMS toolkit", Software Practice and Experience 25(4), April 1995, 429--461 |
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http://www.cs.utk.edu/~dongarra/WEB-PAGES/cs594-2002.html
(810 words)
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| | Instruction-Level Parallelism - Compare Prices & Reviews at Smarter |
| | Sylvan Learning Center provides personalized instruction to students of all ages and skill levels. | | | Scheduling and Load Balancing in Parallel and Distributed Systems/Eh0417-6 | | | Home > Books > Computers > Computer Science > Parallel Processing (Electronic Computers) > Instruction-Level Parallelism |
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http://www.smarter.com/books-1/product/instruction-level_parallelism-864304
(261 words)
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| | [No title] |
| | An instruction that is not control dependent on a branch cannot be moved to after the branch so that its execution is controlled by the branch. | | | Control dependencies relaxed to get parallelism Get same effect if preserve order of exceptions (Ex: address in register checked by branch before use) and data flow (Ex: value in register depends on branch) (Speculation, Delayed branching etc). ¡Ú & Z K Z Z ) Z 0 Z Æ Z K ) 0 ÿ þ |
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http://www.cs.rutgers.edu/~vchinni/ece563/ILP-lecture.ppt
(770 words)
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| | MTU Department of Computer Science |
| | Carr, R. Lehoucq, A Compiler Blockable Algorithm for QR Decomposition, Proceedings of the 7th SIAM Conference on Parallel Processing for Scientific Computing, San Francisco, CA, pp. | | | Onder, R. Gupta, Instruction Wake-up in Wide Issue Superscalars, 7th European Conference on Parallel Computing, LNCS 2150, Springer Verlag, Manchester, UK, pp. | | | Mayo and P. Kearns, A Time-Based Schema for Stable Predicate Evaluation, Proceedings of the Tenth IASTED International Conference on Parallel and Distributed Computing and Systems, pp. |
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http://www.cs.mtu.edu/html/publications.html
(5196 words)
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| | [No title] |
| | º _ _ _ P P T 9 / È 0 Ò z ? Ù Ú % ð$> ó ! ¨. Introduction to Advanced Pipelining Chapter 3 ª / ¨5 Adapted from David A. Patterson- Computer Science 252 ¡ 6 6 ª 6 ó k = ¨; Advanced Pipelining and Instruction Level Parallelism (ILP) ¡ | | | º _ _ _ P P T 9 / È 0 Ò z ? Ù Ú % ð> ó ! ¨. Introduction to Advanced Pipelining Chapter 3 ª / ¨5 Adapted from David A. Patterson- Computer Science 252 ¡ 6 6 ª 6 ó k = ¨; Advanced Pipelining and Instruction Level Parallelism (ILP) ¡ | | | º _ _ _ P P T 9 / È 0 Ò z ? Ù Ú % ð@5 ó ! ¨C Introduction to Instruction-Level Parallelism Chapter 3 Section 3.1 ¡. D . ª D ¨5 Adapted from David A. Patterson- Computer Science 252 ¡ 6 6 ª 6 ó k = ¨; Advanced Pipelining and Instruction Level Parallelism (ILP) ¡ |
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http://www.cs.uakron.edu/~dang/CS665/Fall04/ILPintro.ppt
(351 words)
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| | Chapter 4 Exploiting Instruction-Level Parallelism with Software Approaches |
| | John L. Hennessy and David A. Patterson, Computer Architecture: A Quantitative Approach, third edition, Morgan Kaufmann, New York, 2003. | | | Chapter 4 Exploiting Instruction-Level Parallelism with Software Approaches | | | Putting lt All Together: The Intel IA-64 Architecture and Itanium Processor |
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http://www.eng.mu.edu/corlissg/173.04F/ch4.html
(72 words)
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| | [No title] |
| | Superscalar machine could be object-code compatible with a large family of non-parallel machines, but VLIW machines exploiting different amounts of parallelism would require different instruction sets. | | | Superscalar machines can issue several instructions per cycle. | | | When the available instruction-level parallelism is less than that exploitable by the VLIW machine, the code density of the superscalar machine will be better. |
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http://grail.cba.csuohio.edu/~arndt/vliw.ppt
(804 words)
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| | Instruction Level Parallelism |
| | Most ILP is implicit, i.e., instructions that can be | | | level, in this processors the compiler codes parallel | | | But applications are still written in standard sequential |
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http://www.cs.ualberta.ca/~amaral/talks/MACI-Apr2002/sld062.htm
(25 words)
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| | Instruction-Level Parallelism |
| | Suppose we had a machine which could execute lots of instructions per cycle, limited only by data dependences | | | No load or store stall cycles gives us an idealized parallelism profile |
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http://cag.lcs.mit.edu/6.004/Lectures/lect25/sld008.htm
(30 words)
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| | Journal of Instruction-Level Parallelism |
| | The Role of Return Value Prediction in Exploiting Speculative Method-Level Parallelism | | | CASH: Revisiting Hardware Sharing in Single-Chip Parallel Processors | | | Efficient Modeling of Itanium Architecture during Instruction Scheduling using Extended Finite State Automata |
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http://wotan.liu.edu/docis/dbl/jilpji
(450 words)
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| | The Journal of Instruction-Level Parallelism |
| | The Journal of Instruction-Level Parallelism (JILP) is an electronic archival journal dedicated to soliciting, thoroughly reviewing, and publishing state-of-the-art papers in all areas of instruction-level parallelism (ILP.) | | | Papers submitted in response to this triannual Call for Papers (CFP) are |
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http://www.jilp.org
(79 words)
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| | [No title] |
| | Please submit one electronic copy of a paper (in postscript format) not longer than 5000 words to the PRO- GRAM CHAIR at kemal@watson.ibm.com. | | | The goals of this conference are to bring together researchers in fields related to instruction level parallelism, to encourage interaction, and to further the state of the art in microarchitectures and fine grain parallel processing. | | | Instruction level parallelism has become an intense area of research. |
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http://american.cs.ucdavis.edu/Micro28/cfp.ascii
(212 words)
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| | ILP - Instruction-Level Parallelism |
| | More information about the definition of ILP may appear below: | | | Its the ability of a CPU to execute multiple instructions in parallel at any one time. | | | Every attempt has been made to provide you with the correct acronym for ILP. |
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http://www.auditmypc.com/acronym/ILP.asp
(184 words)
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| | Instruction Level Parallelism |
| | G.S. Sohi, Instruction Issue Logic for High-Performance, Interruptible, Multiple Functional Unit, Pipelined Computers, | | | J.E. Thornton, Parallel Operation in the Control Data 6600, | | | Joseph A. Fischer, Trace Scheduling: A Technique for Global Microcode Compaction, |
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http://cag.lcs.mit.edu/~mfrank/collect/bibs/superscalar.html
(226 words)
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| | Instruction Level Parallelism |
| | For example, in the IA-64 an instruction group, | | | identified by the compiler, is a set of instructions that |
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http://www.cs.ualberta.ca/~amaral/talks/MACI-Apr2002/sld063.htm
(38 words)
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| | [No title] |
| | ACM Symposium on Parallel Algorithms and Architectures (SPAA) | | | ACM SIGPLAN Symposium on Principles and Practices of Parallel Programming (PPoPP) | | | International Symposium on Parallel Architectures and Compilation Techniques (PACT) |
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http://cmc.rice.edu/docs/search.aspx
(504 words)
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