System for limiting shared resource access in multicore system-on-chip (SoC)

• Main Authors: Henning, Carl J, Radack, David J
• Format: Patent
• Language: English
• Published: 26.05.2020
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

A multicore processing environment (MCPE) implements a shared resource access rate (SRAR) safety net to limit the access of user applications to shared system resources (SSR). For each user application, a baseline shared resource access time (SRAT) and baseline SSR access rate (while no other competing applications interfere) may be determined. A utilization for each accessed SSR, including worst case execution time and contention SRAT for competing applications, may be determined. For the user application and competing applications, an access time delta for each accessed SSR and total delta may be determined. Based on the total delta and an access count for each SSR, a multicore derating for the user application may be determined and the time requirement adjusted or allocated to include the multicore derating and baseline SRAT. Accordingly, the core rate limiters may limit data access to each SSR by the user application to a corresponding expected value.