Directory-less snoop offload of a higher level cache management agent with snoop fence

A system comprising:

• a cluster comprising a plurality of processors;
• and
• an upper level cache coupled to the cluster, wherein the cluster further comprises logic configured to perform an operation comprising:
• receiving a fetch request from a first processor of the plurality of processors;
• performing a local snoop operation for the cluster, in response to the fetch request, wherein the local snoop operation is performed without involving the upper level cache;
• and
• sending a fetch response to the first processor, based on the local snoop operation.

A computer-implemented method comprising:

• receiving a fetch request from a processor of a plurality of processors in a cluster;
• sending a snoop request to trigger a local snoop operation for the cluster, in response to the fetch request;
• and
• receiving a snoop response in response to the snoop request, wherein the snoop response comprises an indication that at least one processor in the cluster is in an offline state.