Read e-book online Computer Systems: A Programmer's Perspective (2nd Edition) PDF

By Randal E. Bryant, David R. O'Hallaron

ISBN-10: 0136108040

ISBN-13: 9780136108047

<DIV sercontent> <P style="MARGIN: 0px">For computers, computing device association and structure classes in CS, EE, and ECE departments.

<P style="MARGIN: 0px">Few scholars learning laptop technology or machine engineering will ever be able to construct a working laptop or computer approach. however, so much scholars can be required to take advantage of and application desktops on a close to day-by-day foundation. Computer structures: A Programmer’s Perspective introduces the $64000 and enduring recommendations that underlie desktops through displaying how those rules impact the correctness, functionality, and software of program courses. The text's hands-on technique (including a entire set of labs) is helping scholars comprehend the “under-the-hood” operation of a latest computing device method and prepares them for destiny classes in structures issues equivalent to compilers, desktop structure, working structures, and networking.

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Additional info for Computer Systems: A Programmer's Perspective (2nd Edition)

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It might take 5 times longer for the process to access the L2 cache than the L1 cache, but this is still 5 to 10 times faster than accessing the main memory. The L1 and L2 caches are implemented with a hardware technology known as static random access memory (SRAM). Newer and more powerful systems even have three levels of cache: L1, L2, and L3. The idea behind caching is that a system can get the effect of both a very large memory and a very fast one by exploiting locality, the tendency for programs to access data and code in localized regions.

Initially, the shell process is running alone, waiting for input on the command line. 12 Process context switching. 7 The Operating System Manages the Hardware out our request by invoking a special function known as a system call that passes control to the operating system. The operating system saves the shell’s context, creates a new hello process and its context, and then passes control to the new hello process. After hello terminates, the operating system restores the context of the shell process and passes control back to it, where it waits for the next command line input.

Optimizing program performance. Modern compilers are sophisticated tools that usually produce good code. As programmers, we do not need to know the inner workings of the compiler in order to write efficient code. However, in order to make good coding decisions in our C programs, we do need a basic understanding of machine-level code and how the compiler translates different C statements into machine code. For example, is a switch statement always more efficient than a sequence of if-else statements?

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Computer Systems: A Programmer's Perspective (2nd Edition) by Randal E. Bryant, David R. O'Hallaron

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