L1 Cache

Definition

L1 cache is a high-speed static RAM (SRAM) that a processor uses to store data that it can access immediately. It is usually placed directly on the CPU, which ensures rapid data retrieval.

L1 Cache Benefits 

• Efficient data access: L1 cache stores frequently used data near the CPU, reducing wait time for main memory access and enhancing operational speed.
• Instruction accessibility: L1 cache stores frequently used CPU instructions, such as arithmetic and logic operations, facilitating quick access.
• Split nature: L1 cache often splits into L1d (data) and L1i (instructions), enabling simultaneous fetching of instructions and data for enhanced efficiency.
• Memory traffic reduction: L1 cache minimizes CPU-main memory traffic by providing the most frequently used data and instructions. This speeds up CPU processes and lightens the memory subsystem workload.