Interference channel mitigations differ from platform to platform, though some general approaches exist such as using cache partitioning, disabling unnecessary devices and features, and applying good principles for software architecture and schedule design.
Some mitigation strategies are discussed in our joint white paper with Wind River “Mitigation of interference in multicore processors for A(M)C 20-193”. The MACH178 Foundations white papers RTOS Selection Considerations and Software Architecture Considerations provide some considerations on the topic, and a dedicated white paper on the topic is on a shortlist to be added to future versions of MACH178 Foundations.