Poaching is considered a major driver for the population drop of key species such as tigers, elephants, and rhinos, which can be detrimental to whole ecosystems. While conducting foot patrols is the most commonly used approach in many countries to prevent poaching, such patrols often do not make the best use of the limited patrolling resources.

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Current systems hide data movement from software behind the load-store interface. Software's inability to observe and respond to data movement is the root cause of many inefficiencies, including the growing fraction of execution time and energy devoted to data movement itself. Recent specialized memory-hierarchy designs prove that large data-movement savings are possible. However, these designs require custom hardware, raising a large barrier to their practical adoption.This paper argues that the hardware-software interface is the problem, and custom hardware is often unnecessary with an expanded interface. The täkō architecture lets software observe data movement and interpose when desired. Specifically, caches in täkō can trigger software callbacks in response to misses, evictions, and writebacks. Callbacks run on reconfigurable dataflow engines placed near caches. Five case studies show that this interface covers a wide range of data-movement features and optimizations. Microarchitecturally, täkō is similar to recent near-data computing designs, adding ≈5% area to a baseline multicore. täkō improves performance by 1.4×-4.2×, similar to prior custom hardware designs, and comes within 1.8% of an idealized implementation. CCS CONCEPTS• Computer systems organization → Processors and memory architectures.

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