CPU - architecture and performance

CPU - architecture and performance

1. ALU

   • arithmatic logic unit
     • calculations
     • logic operations

2. cache

   • frequently used instructions
   • allows quick access
     • more expensive
   • close to cpu

3. registers

   • MAR
     • CURRENT instruction`
     • stores single address
   • MDR
     • memory data registor
     • stores data
     • fetched from memory
   • ACC
     • accumulator
     • results from ALU
   • PC
     • program counter
     • stores single address
     • NEXT instruction

4. CU

   • control unit
     • integrates operations
     • regulates operations

5. affects performance

   • clock speed
     • more cycles/second
     • go brrrr
   • cache size
     • faster access
   • number of cores
     • more cycles
       • at same time

6. fetch decode exicute

   • fetch
     • retrieve instruction
   • decode
     • establish action needed
   • exicute
     • carry out instruction

7. Von Neumann

   • data and instructions stored together in the memory