A new investigation reveals that Apple M4 processors running Linux exhibit unexpected cache eviction behavior, referred to as 'forgetting' data. This issue leads to noticeable performance degradation in workloads that rely on sustained cache retention. The problem appears to be tied to how the Linux scheduler interacts with the M4's hardware cache management policies.
- M4 Linux performance suffers when the CPU evicts cached data prematurely.
- Workloads with moderate cache reuse patterns are most affected.
- Check if your containerized apps are hitting this specific cache thrashing.
- Monitor cache miss rates on M4 Linux nodes for sudden spikes.