Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
WAR (write after read) - Data hazards in computer architecture:
WAR (write after read) - j tries to write at destination before it is read by i , hence i wrongly gets the new value. This cannot happen in our instance pipeline because all reads are near the beginning (in ID) and all writes are late (in WB). This hazard take place when there are some instructions that write results early on in the instruction pipeline, and other instructions that read a source late on in the pipeline.
Because of the normal structure of a pipeline, which naturally reads values before it writes results, such type of hazards are rare. Pipelines for difficult instruction sets that hold up auto increment addressing and need operands to be read lately in the pipeline could build a WAR hazards.
If we customized the DLX pipeline as in the above instance and also read some operands late, such as the source value for a store instruction, a WAR hazard could be take place. Here is the pipeline timing for such type of potential hazard, highlighting the stage where the clash takes place:
If the SW reads R2 at the time of second half of its MEM2 stage and the Add writes R2 during the first half of its WB stage, the SW will wrongly read and store the value genrated by the ADD instruction.
The LOOP-ENDLOOP on extract datasets can be used without any kind of errors False. It causes runtime errors.
What is binary adder? Binary adder is constructed with full adder circuit linked in cascade, with the output carry from one full adder linked to the input carry of next full ad
Determine the salient features of a parallel programmable interface, 8255. 24 I/O lines in 3 8-bit port groups - A, B, C A, B can be 8-bit input or output ports C
A scope resolution operator (::), can be used to describe the member functions of a class outside the class.
And-Introduction: In generally English says that "if we know that a lot of things are true, so we know that the conjunction of all of them is true", then we can introduce conj
Q. What is multi-threaded unix kernel? Multi-threaded UNIX kernel: We know threads are light-weight processors demanding minimal state information comprising the processor stat
Q. What are intelligent agents? What tasks will they perform? ANSWER: Intelligent agents are software that helps you, or operate on your behalf, in performing repetitive comput
What are the types of security features employed in client server kinds of network? Security features employed in Client-Server types of network are as illustrated below: a)
explain classification of computers in detail.also explain various application areas of computers
During instruction execution, there are other parts of the CPU that can determine when a physical register might be freed. Briefly describe where else we can put freeing logic and
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd