If a directive is submitted to VA page 30 without approval, what happens? In the following cases, a software-managed TLB is faster than a hardware-managed one:
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If a directive is submitted to VA page 30 without approval, what happens? In the following cases, a software-managed TLB is faster than a hardware-managed one:
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- int x = 0; co x = x + 3;|| x = x + 1; oc Command A = B + C is implemented with machine instructions; it is mapped to the atomic instruction TEMP = B + C; A = TEMP; where TEMP is the local process variable (so each process has its own). List all possible program traces and give the final value for each trace.When this option is available, the I/O queue should be prioritised above the process execution queue. In what ways may this be beneficial? Who knows what will take place if there is a disruption in the I/O. It is unclear at this time if this will have an effect on the maximum burst rate of the CPU. I'm not really clear on the point you're trying to make here.This question is on Process Synchronization in Operating Systems. You need to read the following scenario and find out which Process Synchronization method it resembles with. There are 3 washrooms for men and one for women. Only one person can enter a restroom at a time. When a person leaves the washroom, another person is allowed to enter the washroom. When they are not using the washroom, they are not doing anything. Men are not allowed to use the female washroom. So on a fine rainy day, 9 men arrived and 3 men were allowed to enter the 3 washrooms at a time. They were not allowed to use the female washroom even though it was vacant. What Process Synchronization method has been used here? A) Producer-Consumer B) Readers-Writers C) Dining Philosophers
- OPERATING SYSTEMS A variation of the round-robin scheduler is the regressive round-robin scheduler. This scheduler assigns each process a time quantum and a priority. The initial value of a time quantum is 50 milliseconds. However, every time a process has been allocated the CPU and uses its entire time quantum (does not block for I/O), 10 milliseconds is added to its time quantum, and its priority level is boosted. (The time quantum for a process can be increased to a maximum of 100 milliseconds.) When a process blocks before using its entire time quantum, its time quantum is reduced by 5 milliseconds, but its priority remains the same. What type of process (CPU-bound or I/O-bound) does the regressive round-robin scheduler favor? Explain.If a microprocessor has a cycle time of 0.5 nanoseconds, what’s the processor clock rate? If the fetch cycle is 40% of the processor cycle time, what memory access speed is required to implement load operations with zero wait states and load operations with two wait states?What happens if an instruction isn't received, and it's recorded on VA page 30? Software-managed TLBs are quicker than hardware-managed TLBs in the following scenarios:
- When it comes to process execution, what is the advantage of first allocating it to the I/O queue and then pushing it to the CPU when it is ready? What, in your opinion, will happen if the I/O is not completed correctly? Is the CPU burst going to be affected? What do you mean?Consider the following scenario:a main program starts execution at time t = 03 second later device B sends interrupt signal5 second later device A sends interrupt signal2 second later device E sends interrupt signal3 second later device C sends interrupt signal5 second later device D sends interrupt signal5 second later device F sends interrupt signalhighlight on the following figure the paths of execution that realize the mentioned interrupt scenario.With each highlighted path indicate time value (t = ?)Finally draw one more path from the last ISR executed back to the main program and displayreturn time.Assume a memory management module supporting system for the placement of 1 MB memory. Allocate the following requests [the requests are coming one after the other in the same order]. Clearly mention all the requests which you could not allocate. Request 1: Allocate 70KB Request 7: Allocate 300KB Request 2: Allocate 14KB Request 3: Allocate 100KB Request 4: Allocate 140KB Request 5: Allocate 190KB Request 6: Release 140KB [Allocated by request 4] After finishing all the requests (A) Draw the final tree representation of the system. (b) Find the total free space available in the system for allocation (c) Find the total internal fragmentation caused because of all the allocation Request 8: Allocate 46KB Request 9: Allocate 62KB Request10: Release 100KB [Allocated by request 3] Request11: Allocate 180KB
- Problem 6. Nowadays the virtual address is much larger (64 bits) than the physical address space (e.g., on my MacBook, 35 bits). However, in "the old days" (early 80's), it could be the other way around. For example, on a PDP11/70 minicomputer runing UNIX, each process had a 64 KB (16 bit) virtual address space, while the machine had a 2 Megabyte physical memory. The virtual address space was divided into 8 pages of 8 Kbytes each. Thus each process had a page table with 8 entries. a. How big (how many bits) were the physical addresses in this system? b. How many high-order bits of the virtual address made up the virtual page number? c. How many bits are the offset in the page, and the physical page slot number? d. In the table below, you are given virtual-to-physical address mappings. For each one, say what page table entry was used, and what it contained, i.e., what the corresponding virtual page number (VP#, i.e., index into the page table) and physical page number (PP#, i.e.,…Two main techniques are used for memory management in modern computers and operating systems, as described in this module's readings: paging and segmentation. Sometimes they are combined in a segmentation with paging scheme. Design a memory management scheme for a 50 bit computer architecture, using paging, segmentation or both, as described in this module's readings. Your post should include a clear translation scheme from a 50 bit logical address to a 50 bit physical address including a picture that shows how this translation takes place. In particular, each field of the logical address must be clearly depicted and its length in bits must be specified. The proposed scheme must be at least somewhat realistic; for this reason, simple paging and simple segmentation schemes are automatically disqualified, due to the impossible requirements imposed on the implementation in this case (50 bits addresses)When feasible, what are the upsides of prioritizing the I/O queue as the place where processes would be executed? If the I/O connection suddenly goes down, what do you expect to happen? How would this affect the fastest possible CPU burst rate? I'm not quite sure I get what you're getting at here.