Mechanism and method employing a plurality of hash functions for cache snoop filtering

A method for filtering snoop requests to a cache memory, said method comprising:

• storing a first set of corresponding snoop filter indications within a first storage;
• storing a second set of corresponding snoop filter indications within a second storage;
• and
• receiving a transaction request including an address;
• performing a first hash function on said address and generating a first index value for accessing said first storage;
• performing a second hash function on said address and generating a second index value for accessing said second storage;
• selectively generating a snoop operation to said cache memory for said transaction request dependent upon a corresponding snoop filter indication stored in each of said first storage and said second storage that corresponds to said address.

A mechanism for filtering snoop requests to a cache memory, said method comprising:

• means for storing a first set of corresponding snoop filter indications within a first storage;
• means for storing a second set of corresponding snoop filter indications within a second storage;
• and
• means for receiving a transaction request including an address;
• means for performing a first hash function on said address and generating a first index value for accessing said first storage;
• means for performing a second hash function on said address and generating a second index value for accessing said second storage;
• means for selectively generating a snoop operation to said cache memory for said transaction request dependent upon a corresponding snoop filter indication stored in each of said first storage and said second storage that corresponds to said address.