1. (25%) Compare performance of a Processor with cache vs. without cache. Assume an Ideal processor with 1 cycle memory access, CPI = 1 Processor without cache: Assume main memory access time of 4 cycles Assume 50 % instructions require memory data access Processor with cache: Assume cache access time of 1 cycle Assume hit rate 0.95 for instructions, 0.80 for data

1. (25%) Compare performance of a Processor with cache vs. without cache. Assume an Ideal processor with 1 cycle memory access, CPI = 1 Processor without cache: Assume main memory access time of 4 cycles Assume 50 % instructions require memory data access Processor with cache: Assume cache access time of 1 cycle Assume hit rate 0.95 for instructions, 0.80 for data

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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You are given an instruction set architecture (ISA) with a variable-length instruction encoding scheme and instruction categories for a test program as tabulated in Table 1. Table 1: Instruction Categories and Encoding Scheme Instruction Length (bits) Instruction Category Frequency 40% 24 ALU operations Loads Stores 32 32 20% 20% 20% 16 Branches A. Compute the average instruction length (AIL) for the variable-length instruction encoding scheme in Table 1. B. Compute the memory storage requirements (in bytes) for the test program under the variable-length instruction encoding scheme (Table 1) if it contains 1 billion (i.e., 1 x 10º) instructions. C. Compute the memory savings (as a percentage) compared to a baseline fixed-length instruction encoding scheme with 32 bits per instruction for the test program with 1 billion (i.e., 1 x 10°) instructions.
Register is negligible.. Draw diagram and show details...
please whit justification how to get the right anwser Consider a computer system with 2 levels of caches L1 and L2. L1 Cache has l-Cache and a D-Cache. The I cache has a miss rate of 17% and the D-Cache has a miss rate of 14.6%. The miss penalty to L2 cache is 13 cycles. L2 cache miss rate is 70.9% and the miss penalty to the main memory is 177 cycles.The frequency of all data operations is 34%. Assuming a processor with no memory stalls has a CPI of 3. What is the CPI with memory stalls? Select one: O a. 33.42 O b. 27.19 Oc. 46.76 O d. None of the options O e. 6231894.43 Of. 45.51
How many kb of L1 cache if each core is consist of 64 kb L1 for instruction and 64 kb L1 for data in a 6-core processor?
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Answer the questions Computer architecture
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Access time 1 nanosecond L1-Cache 32 KB 32B Main Cache K 256 KB CPU memury 8 GB LI D-Cache 32B 32 KB Access time: I nanosecond Access time: 4 ranosecond Access time: 100 nanosecond Figure 1 Figure 1 illustrates a Pentium processor memory hierarchy. The Pentium processor features two caches, L1 and L2. Both caches use a 32-byte block size. L1 is located next to the CPU, whereas L2 is located between the processor and the main memory. Similar to other types of processors, the L1 cache is really two caches. The Pentium divides the L1 cache into a cache for instructions (called the I-cache) and a cache for data (called the D-coche). Rajah 1 menunjukkan hirarki ingatan Pentium pemproses. Permproses PentiLTm mempunyai dua cache, Li dan L2. Kedua-dua coche menggunakan saiz blok 32-bait. Li terletak di sebelah CPU, manakala L2 terletak di antara pemproses dan ingatan utama. Sama seperti jenis pemproses lain, cache L1 sebenarnya terdiri dari dua cache. Pentium membahagikan cache Li kepada cache…
Assume that core components of single-cycle processor (shown below) have the following latencies: Regs Rd/Wr 80ps/60ps Adder Sign-Extend 20ps I-Mem Mux ALU D-Mem Shift-Left-2 40ps 50ps 20ps 100ps 200ps 20ps Single-cycle processor data path: Left [25-0 [31-26] PC+4 [31-28 Shift Let [25-21] Read Reg. 1 CLK - (20-16] Read Reg. 2 Addr. Data Read 15-11 Write Zero data -Cache / -MEM Res. Addr. Read Wite Data data 2 Read Data Register File Write Data RegWrite RegDst Branch (15-0) Sign Extend D-Cache D-Mem ALU 32 control ALUSrc Control InstType Memwrite MemtoReg MemRead Jump Suppose that this data path executes only two types of instruction: sub $rd, $rs, $rt lw $rt, offset ($rs) What would be the clock period to correctly execute the two instructions on the above single-cycle processor? Assume that PC register doesn't take any latency (i.e. Propagating a new PC value to I-Cache/I-Mem doesn't take any cycle).
Given a processor using 32-bit memory addresses, and a 4 KiB direct-mapped cache memory that stores 32 bits of data for each address. Approximately what percent of the cache memory is spent on address and data valid information? a)32% b)42% c)52% d)62%