Host Memory Access Waiting for Background Operation Completion
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Solution Overview
Problem
Memory access commands are often ignored or discarded during background operations on memory devices, leading to resource wastage and inefficiency due to the host not knowing whether the memory device is performing a background operation.
Innovation Solution
The memory device sends an operation completed notification to the host after finishing a background operation, allowing the host to initiate a wait and send memory access commands only after receiving this notification, thereby avoiding resource wastage and ensuring efficient command execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the host continuously sends memory access commands during background operations, then the host maintains high productivity, but the memory device cannot execute commands leading to resource wastage and loss of time
Solution Approach 1:
The host initiates a wait state before sending memory access commands during background operations. This preliminary action prevents the memory device from receiving and discarding commands that cannot be executed, thereby avoiding resource wastage and reducing the loss of time from failed command transmissions.
2Loss of energy
If the host waits for operation completed notification before sending commands, then resource wastage is reduced, but the host experiences increased loss of time due to waiting
Solution Approach 1:
The memory device sends an operation completed notification to the host when background operations finish. The host uses this feedback signal to determine when to resume sending memory access commands, ensuring that commands are only sent when the memory device is ready to execute them, thus eliminating resource wastage without unnecessary waiting.
3Ease of operation
If the host sends memory access commands during background operations, then the host maintains ease of operation, but the memory device discards commands leading to loss of information
Solution Approach 1:
The host initiates a wait state before transmitting memory access commands during background operations. This preliminary action ensures that commands are only sent when the memory device is ready to receive and execute them, preventing command loss while maintaining ease of operation through automated wait management.
Data Source
AI summary
Aspects relate to interrupting memory access during background operations of a memory device. In one example, a host for a memory device includes background operation circuitry configured to permit a background operation by a memory device. The host is coupled to the memory device through a bus. The host receives an operation completed notification from the memory device to indicate that the memory device has completed performing the background operation. Memory access command circuitry is configured to receive a memory access command. The memory access command concerns reading or writing data to the memory device coupled to the host. The memory access command circuitry initiates a wait at the host for the memory access command, and sends the memory access command to the memory device in response to receiving the operation completed notification.