the TLB
The MMU translates this virtual address into a physical address and sends it to cache/main memory
Cache/Main memory returns the requested data Word to the CPU
9.6.3 Multi-level page tableMulti-level page table-hierarchical structure, used to compress page tables .1. For an example of a two-tier page table hierarchy, the benefits are:
If a PTE in a page table is empty, then the corresponding Level two page table does not exist at all
Only a single-level page tab
Division Instruction no definition for all condition code bits Bit operations Directives :and logic with or logical or not logic does not affect the flag bit XOR or test instruction except for the four kinds of, set CF, of 0,af undefined, SF,ZF, PF sets the shift instruction based on the result of the operation:SHL logical left SHIFT instruction SHR logical Right SHIFT instruction shift instruction based on result set SF,ZF,PF bit ROL loop left shift instruction ROR loop right Shift instructio
where the contents of the disk sector should be stored.
The logical block number translates a sector address and then transfers the content to main memory without CPU interference, a process known as direct memory access. This data transfer is called DMA transfer.
When the volume of a disk sector is securely stored in main memory, the disk controller notifies the CPU by sending an interrupt signal to the CPU.
Problem:may be a bit low-level, the
document descriptor and stream buffer. To reduce system overhead.10.9 synthesis: What should be used I/O functionMost of the time, you can use standard I/O.Use the Rio function when using a network socket. You need to format the output, use the sprintf function to format a string, and then use Rio_writen to send it to the socket interface. Format the input, use Rio_readlineb to read a complete line of text, and then use scanf to extract the different
stack are modified by the same instruction. There are usually two kinds of conventions:The original value of the pressed-in%ESP is pressed into the value of the%esp minus 4.4.2 Logic Design and hardware control language HCL1, logic gatesA logic gate is a basic computational element of a digital circuit. They produce output that is equal to some boolean function of their input bit value.and OR | | Not!The
). The purpose of oglsl is to enable the graphics cards of most manufacturers on most platforms to use the same advanced coloring language. It will allow developers to create a wide range of graphics, images, and computing applications accelerated by the next generation of highly parallel graphics hardware. It will be called the foundation of the upcoming opengl2.0 release.
With regard to the application of OpenGL 1.5, OpenGL ARB stated in the joint statement: "It can render the computer graphi
parent process is the same as the Descriptor table, file table, V-note tables correspondence and child processes. Descriptor FD points to the same file table entry in the parent-child process. So when the child process has finished reading, the parent process reads O, and the output O10.4:Dup2 (A, A, b) refers to the redirection of a to a, and a copy to the B standard input descriptor is 010.5:Dup2 (FD2,FD1) fd2 Copy to Fd1,fd1 is redirected to FD2. So after performing the read again, the outpu
default, the mode view slides from the bottom edge of the screen to half the current entire screen, and the modal view completes a separate task that is related to the main function of the program, especially for multi-level subtasks that are missing from the main function interface. This operation temporarily bypassed the normal operation of the application.Modal views are often used to edit or add content, and when you need it, the modal view slides out of the bottom of the screen and then ob
1. System implementation
Development using the SPRINGMVC framework
Using Maven for system building
Using the MySQL Database
The project only implements the basic functions of viewing books, searching books, adding shopping carts, creating orders, and managing books.
Front desk use bootstrap for page layout, borrowed online template
2. Project Introduction1) front page compositi
Objective:This series is in the author's study "Machine Learning System Design" ([Beauty] willirichert) process of thinking and practice, the book through Python from data processing, to feature engineering, to model selection, the machine learning problem solving process one by one presented. The source code and data set designed in the
2018-2019-1 20165329 "Information Security system Design Fundamentals" 4th Week Study SummarySummary of learning contents of textbook
Y86-64 directive: The y86-64 instruction is a subset of the x86-84 instruction set. It includes only 8-byte integer operations. There are 4 integer operations directives: ADDQ, SUBQ, ANDQ, and Xorq. There are 7 jump commands: jmp, Jle, JL, je, jne, Jge, and JG. There are
2018-2019 20165203 Information Security System Design Basics Chapter 5 study summary teaching material content summary important concepts
Storage System: a hierarchy of storage devices with different capacity costs and access time.
Cache memory ------ buffer area for data and instructions in primary storage ------ disk ------ buffer area for connecting data on
20145216 20145330 "Fundamentals of Information Security system design" a familiar experimental report cover for the Experimental development environmentExperimental content1. Connecting the ARM Development Board2. Build HyperTerminal3. Start the experimental platform4. Modify the IP of the XP system and the Redhat virtual machine so that they are in the same netw
In software architecture design, layered structure is the most common and most important structure. Microsoft's recommended layered structure is generally divided into three layers, from the bottom to the following: Data access layer, business logic layer (or to become a domain layer), the presentation layer, as shown in the figure:
Fig. 1:3 Layered Structure
Data access layer: sometimes called the persistence layer, its function is mainly responsib
-2018-2019-1 20165206 "Information Security system Design Fundamentals" 4th Week Study summary-Textbook learning content Summary
Programmer-Visible state: Each instruction in the Y86-64 program reads or modifies portions of the processor state, which is known as the programmer's visible state. Includes: program register, condition code, program status, program counter, and memory.
Y86-64 direct
also very interesting (the original book uses 19 pages of volume to describe the principle and action of the dispenser), smart programmers use a number of techniques to achieve, refer to p568 page.9.10 garbage Collection (recycling)The garbage collector is a dynamic allocator that automatically frees the allocated blocks that are no longer needed by these programs. Garbage collection dates back to the the 1960s early-morning Lisp
The Structured Integrated Cabling system (structured Cabling Systems, abbreviated SCS) adopts modular design and layered star topology. It adapts to the wiring system of any building or building. Its representative product is the building and architectural complex cabling system (premises distribution systems, abbrevia
the experiment instruction book.1. Read and understand the source codeEnter the directory where 07_HTTPD is located and use the VI Editor to understand the source code.2. Compiling the applicationWith the GCC compiler, the copy.c and HTTPD.C under the folder are compiled, and the copy and httpd executables appear.3. Download and debugDownload the HPPTD to the Development Board using the NFS service and copy the test page for debugging4. Native TestEn
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