Write Booster Buffer Hibernate Control for Conditional TLC Flush
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Solution Overview
Problem
Existing memory systems experience performance loss, increased power consumption, and processing overhead due to unnecessary flushing of write booster buffers into TLC blocks, which can result in invalid data and increased programming operations.
Innovation Solution
The memory system determines whether to flush the write booster buffer based on the quantity of data stored and the endurance parameter, delaying the flush operation until a threshold is reached to minimize invalid data transfer and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the memory system flushes the write booster buffer into TLC blocks before entering hibernate mode, then data is preserved, but performance is reduced and power consumption increases due to unnecessary programming operations
Solution Approach 1:
The patent changes the parameter of buffer management by introducing conditional flushing based on buffer fill level thresholds. Instead of always flushing before hibernate, the system dynamically adjusts the flushing behavior based on whether the buffer contains valid data (above threshold) or invalid data (below threshold), thereby eliminating unnecessary programming operations while preserving necessary data.
Solution Approach 2:
The memory system performs self-diagnosis by monitoring its own buffer fill level and automatically making decisions about whether to flush the buffer before hibernate. This self-service mechanism eliminates the need for external control and prevents unnecessary programming operations by independently determining when flushing is actually beneficial.
2Reliability
If the memory system flushes the write booster buffer into TLC blocks before entering hibernate mode, then data is preserved, but power consumption increases due to additional programming operations
Solution Approach 1:
The patent changes the energy consumption parameter by introducing conditional flushing logic. The system monitors the buffer fill level as a control parameter and only performs the energy-consuming flush operation when the buffer contains valid data above the threshold, thereby eliminating wasteful energy expenditure on flushing invalid data.
Solution Approach 2:
The memory system autonomously monitors its own buffer state and makes energy-efficient decisions about when to perform flush operations. This self-service capability allows the system to eliminate unnecessary programming operations that would consume power, while still ensuring data preservation when actually needed.
3Reliability
If the memory system flushes the write booster buffer into TLC blocks before entering hibernate mode, then data is preserved, but processing overhead increases due to additional programming cycles
Solution Approach 1:
The patent simplifies the processing complexity by introducing a threshold-based control parameter for buffer flushing. Instead of complex decision logic, the system uses a simple fill level threshold to determine whether to flush, reducing the processing overhead while maintaining data preservation reliability.
Solution Approach 2:
The memory system autonomously manages its own buffer by monitoring fill levels and making independent decisions about flushing operations. This self-service approach eliminates the need for complex external control logic and reduces processing overhead by automatically eliminating unnecessary flush operations.
4Productivity
If the memory system delays the flush operation until a threshold is reached, then unnecessary write operations are reduced, but data preservation risk increases if the buffer is not flushed in time
Solution Approach 1:
The patent resolves this contradiction by changing the control parameter from binary (flush or not) to threshold-based (flush when above threshold, don't flush when below). This parameter change allows the system to delay flushing until necessary, reducing unnecessary write operations while guaranteeing data preservation when the buffer contains valid data above the threshold.
Solution Approach 2:
The memory system autonomously monitors its buffer fill level and makes intelligent decisions about when to flush. This self-service mechanism ensures that flushing is delayed only when safe to do so (buffer contains invalid data below threshold), while automatically preserving data when the buffer is full of valid data above the threshold.
Data Source
AI summary
Methods, systems, and devices for write booster buffer and hibernate are described. The memory system may initiate a first operation to enter a first power mode having a lower power consumption than a second power mode. In some cases, the memory system may determine whether a quantity of data stored in a buffer of single-level cells associated with write booster information satisfies a threshold based on initiating the first operation. The memory system may determine whether to perform a second operation to transfer the quantity of data stored in the buffer of single-level cells to a portion of memory comprising multiple level cells based on determining whether the quantity of data satisfies the threshold. The memory system may enter the first power mode based on determining to perform the second operation to transfer the quantity of data from the buffer to the portion of memory.