Programmable Memory Metadata State Transitions for Lower Latency
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Solution Overview
Problem
Existing memory systems face increased latency, power consumption, and bandwidth usage when modifying metadata, and they lack flexibility in managing metadata for application-specific updates.
Innovation Solution
A memory device is configured to modify metadata directly in a programmable manner, allowing for automatic flexible state transitions based on various command sequences, and the metadata state transition rules can be programmed using a table or function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the host device modifies metadata by accessing the memory device, then the metadata can be updated, but the latency increases and system performance decreases
Solution Approach 1:
The patent introduces an intermediary metadata buffer and state machine logic within the memory device that mediates between the host device and the metadata storage. This intermediary structure allows the host to update metadata state transitions without directly accessing the full metadata storage, thereby reducing access latency while maintaining update capability.
Solution Approach 2:
The metadata management is segmented into distinct state transitions and buffer regions. The metadata is divided into multiple states that can be transitioned through programmable state machines, allowing incremental updates rather than requiring full metadata access for each modification, thus reducing overall latency.
2Reliability
If the host device modifies metadata through memory access, then the metadata can be updated, but the power consumption increases
Solution Approach 1:
The intermediary buffer and state machine within the memory device reduce the need for high-power full metadata access operations. By handling state transitions locally with lower power consumption and only accessing full metadata when necessary, the system reduces overall power usage while maintaining update functionality.
Solution Approach 2:
The system performs partial metadata updates by only modifying specific state bits in the metadata buffer rather than performing complete metadata read-modify-write cycles. This partial action approach significantly reduces power consumption while achieving the necessary metadata update capability.
3Reliability
If the host device modifies metadata through memory access, then the metadata can be updated, but the bandwidth usage increases
Solution Approach 1:
The metadata buffer acts as an intermediary that captures and processes metadata state transitions locally, reducing the volume of data that needs to be transferred over the memory interface. This intermediary structure filters out unnecessary bandwidth consumption while maintaining full metadata update capability.
Solution Approach 2:
The patent extracts the metadata state transition logic from the host device and places it within the memory device itself. This extraction removes the bandwidth burden from the memory interface by handling state transitions internally, requiring only minimal signaling rather than full metadata data transfer.
4Ease of operation
If fixed rules are used for metadata modification, then the process is simple, but the flexibility for application-specific updates is limited
Solution Approach 1:
The patent implements dynamic metadata state transition rules through programmable state machines that can be configured with custom transition tables. This dynamic configuration allows the system to adapt to different application-specific requirements while maintaining a simple operational interface, resolving the contradiction between simplicity and flexibility.
Solution Approach 2:
The system changes the parameters of metadata management by allowing programmable state transition rules rather than fixed rules. The transition tables and state machine configurations can be modified to accommodate different applications, providing flexibility while maintaining ease of operation through standardized programming interfaces.
Data Source
AI summary
Methods, systems, and devices for programmable metadata and related operations are described. A method may include receiving signaling that indicates a set of rules for transitions of states of metadata at a memory device storing the metadata. The memory device may receive a command from a host device associated with a set of data after receiving the set of rules. The memory device may transition metadata associated with the set of data stored at the memory device from a first state to a second state based in part on the set of rules and the command. The memory device may execute the command received from the host device.