Memory Read Hardware Parallel Lookup for Cache Coherency
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Solution Overview
Problem
Memory device operations, particularly read operations, suffer from latency and resource consumption due to the need for firmware execution, especially when performing coherency checks and logical block addressing lookups, which can be time-consuming and resource-intensive.
Innovation Solution
Implementing hardware components to perform coherency checks and LBA lookups in parallel, without executing firmware, to reduce processing time and resource consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If firmware is executed to perform coherency checks and LBA lookups during read operations, then processing accuracy and reliability are improved, but processing time increases and resource consumption increases
Solution Approach 1:
The patent segments the read operation processing into two distinct parts: (1) hardware-based parallel execution of coherency checks and LBA lookups, and (2) firmware-based final decision making. This segmentation allows time-critical operations to be performed in parallel by hardware while the firmware only handles the final determination, thereby reducing overall processing time while maintaining accuracy.
Solution Approach 2:
The patent performs coherency checks and LBA lookups as preliminary actions before the final read operation completion. By executing these checks in advance through hardware circuits in parallel, the system prepares the necessary information beforehand, so that when the firmware needs to make the final read decision, all required data is already available, eliminating sequential waiting time.
2Reliability
If firmware is executed to perform coherency checks and LBA lookups during read operations, then processing accuracy is improved, but resource consumption increases
Solution Approach 1:
The patent segments the processing workload between hardware circuits and firmware. Hardware circuits perform the computationally intensive coherency checks and LBA lookups in parallel, consuming power efficiently through dedicated logic. The firmware only performs lightweight final decision making, significantly reducing overall resource consumption compared to firmware-only execution.
Solution Approach 2:
The patent replaces the mechanical/firmware-based sequential processing system with a hardware-based parallel processing system for coherency checks and LBA lookups. This substitution eliminates the need for firmware to sequentially execute complex lookup operations, reducing both computational resource consumption and energy usage while maintaining processing accuracy.
3Speed
If hardware components perform parallel lookups without firmware, then processing speed is improved, but operational complexity increases
Solution Approach 1:
The patent segments the system into hardware components for parallel lookup operations and firmware for coordinated control. The hardware complexity is confined to dedicated lookup circuits that operate autonomously in parallel, while the firmware maintains simplified coordination logic. This segmentation manages operational complexity by clearly defining boundaries between hardware and firmware responsibilities.
Solution Approach 2:
The patent introduces an intermediary coordination mechanism between the parallel hardware lookup circuits and the firmware. This intermediary layer manages the interaction between multiple parallel operations and the sequential firmware, providing a structured interface that simplifies the overall operational complexity while enabling high-speed parallel processing.
Data Source
AI summary
Implementations described herein relate to memory device hardware host read actions based on lookup operation results. In some implementations, a memory device may include one or more components configured to receive, by a hardware component of the one or more components and from a host device, a request to read data. The hardware component may be configured to perform a first lookup operation to determine whether the data is associated with a write data entry in a cache memory. The hardware component may be configured to perform a second lookup operation associated with an address of the data in a memory, where the second lookup operation is performed irrespective of a first result of the first lookup operation. The hardware component may be configured to perform one or more actions based on the first result and a second result of the second lookup operation.