1. If you are to add a new 10MB process in the memory, where could it possibly be added and why? 2. What could be the size of the gree block just before it was partitioned by x?
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1. If you are to add a new 10MB process in the memory, where could it possibly be added and why?
2. What could be the size of the gree block just before it was partitioned by x?
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- In order to build the whole of the binary code in a single pass over the source file, what obstacles does an assembler need to overcome? What are the key distinctions between code that has been written for a one-pass assembler and code that has been written for a two-pass assembler?There are many parameters that could be used to describe disk performance; among them are: number of bits per track disk capacity (in bits) number of disk surfaces rotational speed rotational latency transfer rate tracks per surface sectors per track blocks per track sectors per block seek time speed of disk arm block-read time number of blocks Some of these parameters are independent, and others are (approximately) linearly related. That is, doubling one doubles the other. Decide which of these parameters are linearly related. Then, select from the list below, the relationship that is true, to within a close approximation. Note: none of the statements may be true exactly, but one will always be much closer to the truth than the other three. Also note: you should assume all dimensions and parameters of the disk are unchanged except for the ones mentioned. a) If you double the number of sectors per block, then you double the number of blocks on the disk. b)…There are many parameters that could be used to describe disk performance; among them are: number of bits per track disk capacity (in bits) number of disk surfaces rotational speed rotational latency transfer rate tracks per surface sectors per track blocks per track sectors per block seek time speed of disk arm block-read time number of blocks Some of these parameters are independent, and others are (approximately) linearly related. That is, doubling one doubles the other. Decide which of these parameters are linearly related. Then, select from the list below, the relationship that is true, to within a close approximation. Note: none of the statements may be true exactly, but one will always be much closer to the truth than the other three. Also note: you should assume all dimensions and parameters of the disk are unchanged except for the ones mentioned. a) If you divide tracks into half as many blocks, then you double the read time for a block.…
- Suppose a Unix Inode has 10 direct disk block pointers, one single indirect block pointer, one double indirect block pointer, and one triple indirect block pointer. For convenience, each index table has 256 = 28 entries and each block has 1K = 210 bytes. What is the maximum size of a Unix file in Kbytes?Consider the free memory layout shown below (the blocks are ordered from top to bottom). To the right, draw to the what the free memory layouts would be after satisfying requests for (in order) memory blocks of size 55K, 210K, 381K, and 395K. Draw one memory layout for the best-fit algorithm, and one for first-fit. 500K 300K 200K 300KConsider a disk drive specifications. with the following 16 surfaces, 512 tracks/surface, 512 sectors/ track, 1 KB/sector, rotation speed 3000 rpm. The disk is operated in cycle stealing mode whereby whenever one byte word is ready it is sent to memory; similarly, for writing, the disk interface reads a 4 byte word from the memory in each DMA cycle. Memory cycle time is 40 nsec. The maximum percentage of time that the CPU gets blocked during DMA operation?
- 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.,…Consider a filesystem that uses inodes to represent files. Each inode contains pointers to 12 direct disk blocks, as well as a single and double indirect blocks. Disk blocks are 1KB in size, and a pointer to a disk block requires 4 bytes. If we install this filesystem on a 4TB SSD, we have (select all that apply) the SSD cannot store more than 4 billion files the SSD cannot store more than 1 billion files the SSD at least can store about 650 files the SSD at least can store about 6,500 files none of aboveIF= 220 ns ID = 125 ns EX (addition) = 250 ns EX (shift) = 120 ns EX (subtraction) = 220 ns MEM = 150 ns WB = 175 ns If we consider the above timing, how many stalls would be needed if we want to overcome the data hazard using Stalls and code scheduling? For executing One Iw instruction, how much longer will it take to execute the instruction with 5 stage pipelining compared to single cycle datapath? (only write the value, don't need to mention unit) If we want to execute 395 consecutive sll instructions with 5 stage pipelining what will be the total duration of execution (without any hazards)?
- Before we can store (save) or retrieve (load) data in and out of the main memory, we need to provide the memory address to the memory control unit. This address uniquely identifies one single location (word or record) of the memory. Suppose this address is placed in Memory Address Register (MAR) prior to each memory access. What is the size of MAR for a 16MB RAM? (RAM is word- addressable and each word is 2 bytes). Show all the work.Consider a computer with N processors in a multiprocessor configuration. a. How many processes can be in each of the Ready, Running, and Blocked states at one time? b. What is the minimum number of processes that can be in each of the Ready, Running, and Blocked states at one time?The Pep/9 emulated hardware has 64K memory. But, how is it used? No more than 0x0030 memory was written thus far. So, what's up with all that extra RAM? How does Pep/9 know what to do with each memory area? Another point of view Only "global" variables have been used. How would utilizing "local" variables affect things? What makes them unique? (Consider "stack").
