How much of a log entry's data can a particular log processing function access? The following code determines the typical number of cache misses per entry while using 64-byte cache blocks and no prefetching.
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- A direct-mapped cache consists of 16 blocks. A byte-addressable main memory contains 4K blocks of 16 bytes each. Access time for the cache is 30 ns and the time required to fill a cache slot from main memory is 250 ns. Assume a request is always started in sequential to cache and then to main memory. If a block is missing from cache, the entire block is brought into the cache and the access is restarted. Initially, the cache is empty. a) Show the main memory address format that allows us to map addresses from main memory to cache. Be sure to include the fields as well as their sizes. b) Compute the hit ratio for a program that loops 4 times from locations 0 to 42 (base 10) in memory. c) Compute the effective access time for this program.How many fields can the specified log processing function access in a log entry? Calculating average cache miss rates per entry using 64-byte blocks and no prefetching is done using the following code.A direct-mapped cache consists of 8 blocks. A byte-addressable main memory contains 4K blocks of eight bytes each. Access time for the cache is 20 ns and the time required to fill a cache slot from main memory is 300 ns. Assume a request is always started in sequential to cache and then to main memory. If a block is missing from cache, the entire block is brought into the cache and the access is restarted. Initially, the cache is empty. c) Compute the effective access time for this program. Show me how to solve using this equation: EAT = H x AccessC + (1 – H) x AccessMM where H is the cache hit rate and AccessC and AccessMM are the access times for cache and main memory, respectively. thanks
- A cache is set up with a block size of 32 words. There are 64 blocks in cache and set up to be 4-way set associative. You have byte address 0x8923. Show the word address, block address, tag, and index Show each access being filled in with a note of hit or miss. You are given word address and the access are: 0xff, 0x08, 0x22, 0x00, 0x39, 0xF3, 0x07, 0xc0.To what extent may a certain log processing function access the various components of a log entry? The following code determines the median number of cache misses per entry while using 64-byte cache blocks and no prefetching.A message slot is a cache line that contains status flags and the message itself. The state can be empty or ready, and communication occurs through a single cache line. Both the sender and the receiver write the message to the cache line. The receiver updates the state from empty to ready, then polls the cache line in a loop waiting for the sender to send a message. The sender waits in a tight loop until the receiver acknowledges the cache line, changes the state from ready to empty, and acknowledges receipt. Explain that the system uses a snooping cache coherence protocol and describe the cache-coherence transaction taking place on the coherence bus when a message transfer occurs.
- “Prefetching” is a technique that leverages predictable address patterns to speculatively bring in additional cache blocks when a particular cache block is accessed. One example of prefetching is a stream buff er that prefetches sequentially adjacent cache blocks into a separate buff er when a particular cache block is brought in. If the data is found in the prefetch buff er, it is considered as a hit and moved into the cache and the next cache block is prefetched. Assume a two-entry stream buff er and assume that the cache latency is such that a cache block can be loaded before the computation on the previous cache block is completed. What is the miss rate for the address stream above?Cache block size (B) can aff ect both miss rate and miss latency. Assuming a 1-CPI machine with an average of 1.35 references (both instruction and data) per instruction, help find the optimal block size given the following miss rates for various block sizes. 8: 4% 16: 3% 32: 2% 64: 1.5% 128: 1%…This function will be able to look at which fields in a log entry that it needs to. When you use 64-byte cache blocks and don't prefetch, the following code calculates the average number of cache misses for each entry in the cache.How much access does a particular log processing function have to the different parts of a log entry? The following line of code calculates the median number of cache misses per entry when 64-byte cache blocks are being used and no prefetching is taking place.
- Is there a way to find out which parts of a log entry a certain log processing function can read? The following code determines the typical number of cache misses per entry while using 64-byte cache blocks and no prefetching.Cache Mapping Technique 1. Suppose a computer usingdirect-mapped cache has 2 bytes of byte=addressable main memory and a cache of32 blocks, where each cache block contains 16 bytes.a) How many blocksof main memory are there?b) What is theformat of a memory address as seen by the cache; that is, what are the sizes ofthe tag, block, and offset fields?c) To which cacheblock will the memory address 0x0DB63 map?2. Suppose a computer using fullyassociative cache has 2 bytes of byte-addressable main memory and a cache of128 blocks, where each cache block contains 64 bytes.a) How many blocksof main memory are there?b) What is theformat of a memory address as seen by the cache; that is, what are the sizes ofthe tag and offset fields?c) To which cacheblock will the memory address 0x01D872 map?3. A 2-way set-associative cacheconsists of four sets. Main memory contains 2K blocks of 8 bytes each and byte addressingis used.a) Show the mainmemory address format that allows us to map addresses from…Differentiate between caches that are totally associative and those that are directly mapped.