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US 8,151,084 B2Granted
Using address and non-address information for improved index generation for cache memories
AssigneeOracle America, Inc.
InventorsPaul Caprioli, Martin Karlsson, Shailender Chaudhry
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Abstract
Embodiments of the present invention provide a system that generates an index for a cache memory. The system starts by receiving a request to access the cache memory, wherein the request includes address information. The system then obtains non-address information associated with the request. Next, the system generates the index using the address information and the non-address information. The system then uses the index to fulfill access the cache memory.
Claims22
A method for generating an index for a cache memory, comprising:
- receiving a request to access a cache memory, wherein the request includes address information;
- obtaining non-address information associated with the request, wherein obtaining the non-address information comprises at least one of:
- obtaining information from an instruction that caused the request, or
- obtaining a parameter from at least one component in a computer system in which the cache memory is located;
- generating the index using the address information and the non-address information;
- upon detecting a first switching condition while generating indices using address information and non-address information, switching from generating indices using address information and non-address information to generating indices using only address information;
- upon detecting a second switching condition while generating indices using only address information, switching from generating indices using address information and non-address information to generating indices using only address information;
- and
- using the index to access the cache memory.
6 more elements
An apparatus for generating an index for a cache memory, comprising:
- a receiving mechanism configured to receive a request to access a cache memory, wherein the request includes address information;
- an obtaining mechanism configured to obtain non-address information associated with the request, wherein obtaining the non-address information comprises at least one of:
- obtaining information from an instruction that caused the request, or
- obtaining a parameter from at least one component in a computer system in which the cache memory is located;
- a generation mechanism configured to generate the index using the address information and the non-address information;
- and
- an accessing mechanism configured to use the index to access the cache memory,
- wherein, upon detecting a first switching condition while generating indices using address information and non-address information, the generation mechanism is configured to switch from generating indices using address information and non-address information to generating indices using only address information;
- and
- wherein, upon detecting a second switching condition while generating indices using only address information, the generation mechanism is configured to switch from generating indices using address information and non-address information to generating indices using only address information.
7 more elements
A computer system for generating an index for a cache memory, comprising:
- a processor coupled to the cache memory, wherein the cache memory stores data for the processor;
- a receiving mechanism configured to receive a request to access a cache memory, wherein the request includes address information;
- an obtaining mechanism configured to obtain non-address information associated with the request, wherein obtaining the non-address information comprises at least one of:
- obtaining information from an instruction that caused the request, or
- obtaining a parameter from at least one component in a computer system in which the cache memory is located;
- a generation mechanism configured to generate the index using the address information and the non-address information;
- and
- an accessing mechanism configured to use the index to access the cache memory,
- wherein, upon detecting a first switching condition while generating indices using address information and non-address information, the generation mechanism is configured to switch from generating indices using address information and non-address information to generating indices using only address information;
- and
- wherein, upon detecting a second switching condition while generating indices using only address information, the generation mechanism is configured to switch from generating indices using address information and non-address information to generating indices using only address information.
8 more elements
Dependencies are inferred from the claim text.