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US 8,510,518 B2Granted
Bandwidth adaptive memory compression
AssigneeAdvanced Micro Devices, Inc.
InventorJames Michael O'Connor
Life of this patent
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Abstract
Data is retrieved from system memory in compressed mode if a determination is made that the memory bus is bandwidth limited and in uncompressed mode if the memory bus is not bandwidth limited. Determination of the existence of the bandwidth limited condition may be based on memory bus utilization or according to a depth of a queue of memory access requests.
Claims21
A method comprising:
- retrieving data from memory in one of a compressed access mode and a full access mode according to whether a bandwidth limited condition exists in accessing the memory.
An apparatus comprising:
- bandwidth limited determination logic responsive to one or more memory system conditions to determine whether a bandwidth limited operating condition exists and to supply an indication thereof;
- and
- memory access control logic, responsive to the bandwidth limited determination logic, to retrieve data from the memory in compressed mode when the bandwidth limited operating condition is determined to exist by the bandwidth limited determination logic and to retrieve data from the memory in full access mode when the bandwidth limited operating condition is determined not to exist by the bandwidth limited determination logic.
A method comprising:
- determining whether a memory system is operating in a bandwidth limited mode;
- responsive to the memory system operating in the bandwidth limited mode, accessing data from memory in a compressed access mode;
- and
- responsive to the memory system not operating in the bandwidth limited mode, accessing data from memory in uncompressed mode.
1 more element
Dependencies are inferred from the claim text.