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Computer Architecture – Cache Emulator

The project was written in JAVA. and it can be found on my Github here.

Assignment –

You are to write (in any language you like) a program that simulates a simple cache. The parameters associated with the memory system are as follows: • Memory Block Size = Cache Line Size = 16 • Number of Blocks in Memory =16 • Number of Cache Lines = 8 • 2-way Set Associative Mapped Cache • Write Through Cache Policy

Your memory has the following initial values: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165

The Flow –

init_cache init mem repeat for ever { Print the number of hits and misses print_mem print_cache Get from the keyboard the command from the CPU on the bus: If the command is READ, get the block number, and offset. Then if ( is_cache_hit) increment num_read_hits counter else increment num_read_misses counter load_from_mem print the value of the memory location requested If the command is WRITE, get the block number, offset, and value. Then if ( is_cache_hit) increment num_write_hits counter write_to_cache write_thru_to_mem else increment num_write_misses counter load_from_mem print the value of the memory location written if the command is QUIT, exit the loop }

Operating System Security – Case Study on Network

We were given a case study and we had to write security policies and design a network architecture to provide security to the internal and external network.

You have been named the CIO for a regional retail company which has 17 stores and its own distribution network with five warehouses. Your responsibility is to come up with a plan for the network infrastructure, which includes number of servers, network security devices, desktops, laptops and handheld devices. The plan should be carefully crafted to show all the necessary details in crafting the security policies, and mechanisms to enforce the policies for the IT of the retail company. An understanding of the security issues the company is facing in order to conduct its business has to be reflected in the security aspects of the infrastructure (you should justify why a security measure is taken and how it will affect the business of the retail company).