Process address space in indirect message forwarding houses a mailbox (or in the kernel). Under the shared-memory paradigm, shared-memory regions exist in the process's address space. What distinguishes them, given that both methods use process address space?
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- n indirect message passing model of IPC, a mailbox can be held in the process address space (or in the kernel). Similarly, in shared-memory model, a shared-memory region resides in the address space of the process. Considering both the facts (that both use process address space), what’s the difference between the indirect message passing and shared memory models?Consider an operating system that uses 48-bit virtual addresses and 16KB pages. The system uses a hierarchical page table design to store all the page table entries of a process, and each page table entry is 4 bytes in size. What is the total number of pages that are required to store the page table entries of a process, across all levels of the hierarchical page table?Assume that an SMP (Symmetric multiprocessing) system has private, per-processor run queues. When a new process is created, it can be placed in either the same queue as the parent process or in a different queue with another processor. a. What are the benefits of placing the new process in the same queue as its parent? b. What are the benefits of placing the new process in a different queue?
- In indirect message forwarding, process address space holds a mailbox (or in the kernel). Shared-memory areas are in the process's address space under the shared-memory paradigm. Given that both models use process address space, what differentiates them?Your theory on why the method area of a JVM is shared by all threads operating within the virtual machine raises an interesting question.Remote Method Incocation (RMI) is a mechanism that allows one to invoke a method on an object that exists in another address space. The other address space could be on the same machine or a different one. Briefly describe the following with respect to RMI software architecture: Binder. Activator.
- Within a Java Virtual Machine (JVM), the method area is a region of memory that is collectively utilized by all active threads during execution. What is the reason behind this phenomenon?Can a DLL be mapped into two process' virtual address spaces at different virtual addresses? If so, what problems arise? Can they be solved? If not, what can be done to eliminate them?Do you have any ideas as to why the method area of a JVM is shared by all of the different threads that are now running within the virtual machine?
- 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.Can we put a number on how long it takes for processes and threads to swap in a distributed computing environment?What role does the thread scheduler play in dynamic multithreading, and how does it improve performance?