Managed Memory Scheduling With Time-Aware Power-Off Notification
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Solution Overview
Problem
Memory systems are unable to fully utilize the time provided after a power off notification due to unawareness of the duration of power deactivation, leading to degraded performance from concurrent background operations.
Innovation Solution
The host system provides a power off notification with a value indicating the time remaining until deactivation, allowing the memory system to plan and perform background operations effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the memory system performs background operations concurrently with host operations, then productivity is improved, but reliability deteriorates due to increased risk of interruption during power deactivation
Solution Approach 1:
The memory system receives a power off notification in advance before the actual power deactivation occurs. This preliminary notification allows the memory system to perform background operations during the interval between notification and deactivation, ensuring operations are completed before power is lost while still maintaining productivity through concurrent execution.
2Loss of time
If the memory system utilizes the time budget after power off notification, then loss of time is reduced, but device complexity increases due to time budget management
Solution Approach 1:
The host system provides feedback to the memory system about the available time budget through the power off notification. This feedback mechanism allows the memory system to adjust its background operation scheduling based on the actual time available, optimizing time utilization without requiring complex internal timing mechanisms.
3Ease of operation
If the host system provides power off notification with time budget, then ease of operation is improved, but device complexity increases due to notification protocol
Solution Approach 1:
The power off notification acts as an intermediary mechanism between the host system and memory system. It conveys the time budget information from the host to the memory system in a standardized format, allowing the host to maintain easy power management control while the complexity of time budget communication is handled through the notification protocol.
Data Source
AI summary
Methods, systems, and devices for advanced power off notification for managed memory are described. An apparatus may include a memory array comprising a plurality of memory cells and a controller coupled with the memory array. The controller may be configured to receive a notification indicating a transition from a first state of the memory array to a second state of the memory array. The notification may include a value, the value comprising a plurality of bits and corresponding to a minimum duration remaining until a power supply of the memory array is deactivated. The controller may also execute a plurality of operations according to an order determined based at least in part on a parameter associated with the memory array and receiving the notification comprising the value.