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Implementing Protection with Virtual Memory - computer architecture:
To enable the operating system to implement protection in the VM system, the HW have to:
I. Support at least 2 modes that denoted whether the running process is a user process (executive process) or an operating system process (kernel/supervisor process).
II. Provide a part ion of the CPU state that a user process may read but not write (includes supervisor mode bit).
o Only operating system process may change page tables. Page tables are held in operating system address space thereby preventing a user procedure from changing them.
o When processes desire to share information in a restricted way, the OS have to assist them.
o The write access bit (in both the TLB and the page table) can be used to limit the sharing to only read sharing.
This boils down to the concept of Binary digits. Take an array size of 64 for example. We begin from 0 and end at 63. We need 6 bits.But, if we were to begin from 1 and end at 64,
Parallel computing has been a topic of interest in computing society over the previous few decades. Ever-growing amount of databases and increasing complexity of new problems are
A global variable is a variable A global variable is declared outside the body of each function.
One of the most important competitive strategies for E-Businesses today is business process reengineering. BPR is more than automating business processes to make modest improvement
6.How can we improve the performance of pipeline processing
JK, SR, D master FF 1)draw block diagram 2) combinational circuits using NOR & NAND gate thank you
what is polymorphism
Q. What is span of control? Span of control tells the ratio among superiors and subordinates. Generally organizations are having two different types of spans. They are Wide Spa
Communication by Message Passing You will agree that a single object alone is generally not very helpful. Objects usually emerge as components of a system or a larger program.
Like SPMD, MPMD is actually a "high level" programming model that can be built upon any combination of the previously mentioned parallel programming models. MPMD applications ty
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