coprocessor

implement the openmips processor for teaching. First, the processor can only execute one command. Starting from this simplest situation, by adding logical operation commands, shift operation commands, empty commands, mobile operation commands, arithmetic operation commands, transfer commands, loading storage commands, coprocessor access commands, and exception-related commands in sequence, finally, the teaching version of The openmips processor is im

The coordination process is the abbreviation of the Cooperative program, as the name suggests, is the procedure of working together. The coprocessor has its own independent 桟, local variables and PC counters, while also sharing global variables and most other things with other collaborative programs; The main difference between a coprocessor and a thread is that a multithreaded program can run several thre

be passed when the thread is enabled, and the performance consumption will be greater, and ienumerator is used.As a parameter, there is no such restriction. In unity3d, stopcoroutine (string methodname) is used to terminate a collaboration program, and stopallcoroutines () is used to terminate all the collaboration programs that can be terminated, however, both methods can only terminate the collaboration program in the monobehaviour. There is another way to terminate the collaboration program,

frequent compactions. This table has already been presharding and has several hundred region entries. For some reason, it is not allowed to increase the number of region in the short term. The method used at that time was to generate a table every hour, and only the corresponding table is written for each hour. Later, we found that the 24 tables had a great deal of trouble for subsequent business processing. The 24 tables need to be combined into one table, so a DisableRegionCompaction is writt

specially used as a stack pointer. It is visually called a stack top pointer. The top of the stack is a region with a small address. The more data pushed into the stack, the smaller the ESP. On a 32-bit platform, ESP is reduced by 4 bytes each time.Part 2 registers:In addition to EFLAGS and EIP, the status and control register group also has four 32-bit control registers, CR0, CR1, CR2, and C3.These registers store the overall state of the machine that is not related to the task.CR0 contains 6

simple implementation contains three files, namely the header file Coroutine.h, the implementation of the file coroutine.c and the test main program MAIN.C, I added a note to the code, and compiled run.Coroutine.h Source:Coroutine.h inside are some macro definitions and function declarations:Coroutine_func: A function pointer that declares a function prototype of coroutine;Coroutine_open: The first function to be called when the coprocessor is to be

Article Source: http://www.batchfile.cn /? P = 63 Hbase secondary index module: hindex ResearchHindx is a secondary index solution of hbase. It provides declarative indexes for hbase. It uses a coprocessor to automatically create and maintain index tables. The client does not need to perform dual-write on data. In addition, hindex uses some clever rowkey orchestration methods to make the index data and actual data distributed in the same region, achie

Chapter 1 arm overview and basic programming model. 7 running modes: User, fast interruption, external interruption, privilege, abort, undefined, and system mode. 37 registers: 31 General registers (0 ~ not backed up ~ 7. Backup 8 ~ 14. There are two types of R8 and R9: user and fast. Stack R13, connection register R14, PC R15) and six status registers (Program Status Register CPSR, in each mode, the backup program status register spsr ). Reset, SWI software interruption (User-Defined interrupt

) is completely hardwired. A three-phase pipeline is used to accelerate the execution of arm 2 and arm 3. The first stage holds the instruction retrieved from the memory. The second stage starts decoding, while the third stage actually executes it. Therefore, the program counter always exceeds the two commands currently executed. (This parameter must be included when calculating the offset for the branch command ). Because of this pipeline, two command cycles are lost at the branching (because t

address is converted to the physical address by the paging management mechanism at this time. Pg=1. It can be concluded that the PE and PG flags are set if the paging mechanism is to be enabled. Because paging is enabled only in protected mode, there are four combinations of two bits, 0 and 1, respectively, but only three are valid. Pe=0 and pg=1 are invalid combinations, so loading a CR0 register with a value of 1 and a PE of 0 will cause a generic protection exception.2.CR0 co-processor contr

|Stack_start. | This |. . |_____________| Stack_copy| Greenlet || || Newer Data || VVV | The following is a simple Greenlet code. Copy Code code as follows: From Greenlet import Greenlet def test1 ():Print 12Gr2.switch ()Print 34 Def test2 ():Print 56Gr1.switch ()Print 78 Gr1 = Greenlet (test1)GR2 = Greenlet (test2)Gr1.switch () The current discussion of the coprocessor is generally supported by the programming

Bit31-bit0 Bit31-bit0 Bit11-bit0 Base Address Boundaries Property Base Address Boundaries Property Visible from the table above, 80386 has four 32-bit control registers, named Bit CR0, CR1, CR2, and CR3 respectively. However, CR1 is reserved for future processors to use, CR1 cannot be used in 80386, or it can ca

　　Secondary indexes and index joins are the basic features that the online business system requires the storage engine to provide. RDBMS support is better, and the NoSQL camp is groping for the best solution that fits its own characteristics.This article will use HBase as an object to explore how to build two-level indexes and implement index joins based on HBase. At the end of this article, we will also list the 0.19.3 version of secondary index, which is currently known. Ithbase, Facebook and

Transferred from: http://www.oschina.net/question/12_32573Secondary indexes and index joins are the basic features that the online business system requires the storage engine to provide. RDBMS support is better, and the NoSQL camp is groping for the best solution that fits its own characteristics.This article will use HBase as an object to explore how to build two-level indexes and implement index joins based on HBase. At the end of this article, we will also list the current known secondary ind

add a table coprocessor. Hbase> alter 't1', METHOD => 'table _ att ', 'coprocessor' => 'hdfs: // foo. jar | com. foo. fooRegionObserver | 1001 | arg1 = 1, arg2 = 2 ′ Multiple coprocessor can be configured for a table, and a sequence will automatically grow for identification. To load a coprocessor (a filter program)

reserved for subsequent products. (ZC: Does it use it now?) "06:10" CR2: Save the line Address "06:20" of the last page visited before the page failure is interrupted CR3: Saves the base address of the page directory. Left 20-bit (high 20-bit) is always valid, and the low 12 bits are 0. The low 12 bits of the CR3 together with the other bits to determine the starting address of a 4K long page. (ZC: What is the "other bit" here?) "06:52" mainly look at the cr0:cr0 in a numb

NUTTX Flight Control System program design ideas, first of all we no matter how the operating system is implemented. In this system we learn to use the API on the line.[4] The main processor runs the NUTTX real-time operating system and all functions are implemented through the task process. The main processes are sensor data acquisition, attitude estimation, attitude control, aircraft status identification and switchover, coprocessor control, and log

transaction table also writes the Wal for recovery, but the log format has been ithbase modified, which is called Thlog.When the client updates multiple tables, it starts the transaction, and then each time it is put, the transaction ID is passed to hregionserver.By inheriting the Hregionserver and Hreogin classes, Ithbase overrides most of the operations interface methods, such as put, update, delete, to get transactionalid and state.When the server receives the operation and transaction ID, i

be summarized in the corprocessor, however, it is not well supported for which record starts rowNum, and the summary of the total number of records needs to be implemented by using the coprocessor endpoint separately, which increases the computing workload; if it is placed on the client for paging, it is not feasible for massive data volumes. Of course, the corresponding index table can be generated for this table in Hbase. There are several secondar

Document directory The following table lists the public secondary index solutions: The Join Operation between secondary indexes and indexes is a basic feature that the Online business system requires the storage engine to provide. RDBMS supports better, while the NOSQL camp is exploring the best solution that suits its own characteristics.This article will use HBase as an object to explore how to build secondary indexes based on Hbase and implement index join. At the end of this article, we