Second, we show optimization techniques to reduce the leakage power of l1 and l2 onchip caches without affecting the average memory access time. This setting overwrites the value received from the origin in case of a pull zone. More relevant objectives, multicriteria optimization 3. What is cache mapping need of cache mapping duration.
Boot loader optimization tasks basic setup of cpu like setting up clock, memory preparing and handing over device trees clean up like flushing the cache relocate linux kernel from flash to ram most time consuming handover some parameter and switch to linux kernel optimization possibilities. Storage resources and caching techniques permeate almost every area of communication networks. An overview of hardware based cache optimization techniques. The l2 cache shared with instructions is 256 kb with a 10 clock cycle access latency.
There are several performance optimization techniques for network scanning. Cache can be defined as a collection of items of the same type stored in a hidden or inaccessible place. The most common technique used to reduce disk access time is the block cache or buffer cache. The optimization techniques, the algorithms, and the overall framework can be used to develop other batched level 3 blas kernels and to accelerate numerous applications that need linear algebra on many independent problems. Read online query optimization techniques for olap applications. Lets say you have a repository of hundreds of pdf documents and. The pdf optimizer feature of adobe acrobat is designed for managing fonts, images, and document content of pdf files. Assume a cache block of 4 words, and 4 cycles to send address to main memory 24 cycles to access a word, once the address arrives 4 cycles to send a word back to cache basic miss penalty. For advanced information on the c6000 architecture, see references 3 and 4. Tms320c6000 dsp optimization workshop texas instruments. The data memory system modeled after the intel i7 consists of a 32kb l1 cache with a four cycle access latency. Popular files will tend to stay in memory almost permanently, with others being cycled in and out of memory as they are needed.
Optimum seeking methods are also known as mathematical programming techniques, which are a branch of operations research. I would like to understand the way the caching works to add another tool to my optimisation toolbox. The setting for cache memory locking controls whether the memory used for the index cache, data file cache, and data cache are locked into physical memory, giving the essbase kernel priority use of system ram. While external memory such as hard disk drives or remote memory components in a distributed computing environment represent the lower end of any common hierarchical memory design, this paper focuses on optimization techniques for enhancing cache performance. Configurable 1648 kb l1 cache 4 sfus 32k 32bit registers uniform cache 64k configurable cache shared mem loadstore units x 16 core special func units x 4 interconnect network instruction cache scheduler scheduler dispatch dispatch register file core core core core core core core core core core. Cache modeling and optimization using miniature simulations. Register file is bigger than shared memory and l1 cache.
Mathematical programming and optimization of multiplant operations and process design. The index and data caches are sized correctly, and essbase performance is consistently improved by increasing the data file cache, but further increases are bounded by the previous 2 gb addressability limitation. Thus, optimization can be taken to be minimization. Lecture notes optimization methods sloan school of. Reading these two questions, i see that understanding cpu caching behaviour can be important when dealing with large amounts of data in memory. Capacity optimization methods coms coms are software techniques that allow more data to be stored on less capacity i. Computer memory is central to the operation of a modern computer system. Optimization techniques a free powerpoint ppt presentation displayed as a flash slide show on id. Ppt optimization techniques powerpoint presentation. This technique focuses on cachemain memory interface. For information about setting cache values, see optimizing essbase caches.
This is most effective if the function is called frequently, but contains only a few lines of code. The boldfaced entries show the fastest block size for a given cache size. Cache memory various algorithm international journal of. Pdf an overview of hardware based cache optimization. There are different forms of server side caching when it comes to website performance optimization. Introduction to techniques of optimization fabio affinito f. The technique will cause the compiler to replace all calls to the function, with a copy of the functions code. Pdf storage resources and caching techniques permeate almost every area of communication networks today. While some techniques in this section are active at advanced optimization levels, certain types of applications can receive a performance benefit even when you apply only basic optimizations.
Declare as static functions that are not used outside the file where they are defined. Query execution rechniques for caching expensive methods. In optimization of a design, the design objective could be simply to minimize the cost of production or to maximize the efficiency of production. A comparative study of cache optimization techniques and. Directly optimize segment shapes and weights aperturebased optimization 2. Compilers and optimization techniques 8 compilation. This will eliminate the runtime overhead associated with the function call. Leakage power optimization techniques for ultra deep sub. Pdf this paper focuses on optimization techniques for enhancing cache. Cache optimization techniques and cache aware numerical algorithms, gi dagstuhl research seminar on algorithms for memory hierarchies, volume.
It is often used to reduce the file size andor make pdf documents to comply with a specific version of pdf file format. An overview of cache optimization techniques and cache. The expire value only impacts browser cache and not the keycdn cache. Before setting cache sizes, you must enable cache memory locking or leave cache memory locking disabled the default.
Using caching and optimization techniques to improve performance. In this chapter different types of optimization techniques are described briefly with emphasis on those that are used in the present dissertation. An overview of cache optimization techniques and cache aware numerical algorithms. However, there is an increasing gap between the speed of memory and the speed of microprocessors. We provided detailed analysis and the optimization techniques for the different architectures. There are various discussion forums on the internet where you can get answers to your programming questions if you cannot find the answers in the relevant books and manuals. Benefits of storage capacity optimization methods coms. Optimization techniques basic concepts what is optimization methods space and time optimization. You can find many optimization tips in code complete. Performance optimization an overview sciencedirect topics. At this stage they are not looking for any external functions not present in the object. An optimization algorithm is a procedure which is executed iteratively by comparing various solutions till an optimum or a satisfactory solution is found. At this stage they are not looking for any external functions not present in.
Us20170109387a1 cache optimization for data preparation. These sizes are, in fact, popular block sizes for processor caches today. The data memory system modeled after the intel i7 consists of a 32kb l1 cache. Thereis nosingle method available for solving all optimization problemse. The simplest way for the cache to map the memory into the cache is to mask off the first 12 and the last 7 bits of the address, then shift to the right 7 bits. Harvard medical school potential for improvements, challenges 1. By examining the cpu architecture, ti dsp development tools, and other system issues you should leave the class with a good understanding of the techniques. Hence, a number of methods have been developed for solving di. An overview of cache optimization techniques and cacheaware. This site is like a library, you could find million book here by using search box in the header. What we end up with is a cache that maps any two addresses exactly 8192 2 bytes apart in main memory to the same cache line.
Reducing the miss rate larger block size compulsory misses larger cache size capacity misses higher associativity conflict misses reducing the miss penalty 4. Only worry about compulsory and conflict for optimizations. Find materials for this course in the pages linked along the left. Chapter 4 optimization techniques in perspective optimization means maximization or minimization of one or more functions with any possible constraints. Pike director, minerals processing research institute horton professor of chemical engineering louisiana state university. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
This is the preferred strategy to incorporate performance as a core development principle instead of. Make it modular and easily modifiable so that its easy to work on later. What are the core points about the way the cpu cache works so i can write code that uses it sensibly. All books are in clear copy here, and all files are secure so dont worry about it. Pdf an overview of cache optimization techniques and cache. The c6000 optimization workshop focuses on writing high performance code for the tms320c6000 dsp. I want to thank the many people who have sent me corrections and suggestions for my optimization manuals.