Lagarto tile (a) Lagarto core connect to system cache of …
We’ll start with the basics: the Lagarto tile is a fundamental building block in our project, as shown in Figure 1. You’ll see the design of the Lagarto tile in Figure 1(a).
Each Lagarto tile houses a Lagarto I core, a dedicated L1 data cache, and an L1 instruction cache. This design ensures efficient processing by keeping frequently used data and instructions close to the core, minimizing the need to access the slower system cache.
Now, let’s delve deeper into how the Lagarto core connects to the system cache. The Lagarto core interacts with the system cache through a dedicated cache coherence protocol. This protocol ensures data consistency across multiple cores by keeping track of cache lines and their status. When a Lagarto core needs to access data not present in its L1 cache, it sends a request to the system cache.
The system cache then checks if the requested data is available. If it is, the data is transferred to the Lagarto core’s L1 cache. This process, known as a cache miss, involves a slight performance overhead due to the additional access to the system cache. However, this overhead is minimized through the efficient cache coherence protocol.
The cache coherence protocol plays a crucial role in maintaining data consistency across multiple Lagarto cores accessing the system cache. This is particularly important in multi-core systems where shared data needs to be updated consistently.
Overall, the Lagarto tile is designed to optimize performance by keeping data and instructions as close to the Lagarto core as possible. When data needs to be accessed from the system cache, the cache coherence protocol ensures efficient and consistent data access across multiple cores.
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