DMA Channel Switching Latency Reduction via Cache Pre-Loading
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Solution Overview
Problem
Existing Direct Memory Access (DMA) technologies face latency issues during channel switching, which disrupts pipeline processing and reduces efficiency in data processing systems.
Innovation Solution
The proposed solution involves a processing apparatus and method that includes a channel information acquiring circuit, a storing circuit, a data reading control circuit, and a cache circuit. This apparatus acquires channel information, reads target data from storage regions, and pre-stores this data in a cache for efficient use in data processing, thereby optimizing DMA operations during channel switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If DMA channel switching is implemented using traditional hardware control methods, then data transmission between external devices and memory can be completed without CPU intervention, but latency is introduced during channel switching that disrupts pipeline processing
Solution Approach 1:
The patent applies preliminary action by pre-loading instruction data into a cache circuit before it is actually needed for execution. The data reading control circuit reads target data information from storage regions in advance and stores it in the cache circuit, so that when channel switching occurs, the pipeline can continue processing without waiting for memory access, thereby eliminating read operation latency during channel switching.
2Adaptability or versatility
If channel switching is performed in traditional DMA systems, then multiple data channels can be processed, but pipeline processing is disrupted due to read operation latency
Solution Approach 1:
The patent introduces a cache circuit as an intermediary between the storage regions and the data processing pipeline. This cache circuit holds pre-loaded target data information and provides it to the pipeline during channel switching operations, acting as a buffer that maintains pipeline continuity while enabling multi-channel processing without disruption.
3Reliability
If data is read from storage regions during channel switching, then correct data can be retrieved, but read operation latency reduces overall processing efficiency
Solution Approach 1:
The patent applies preliminary action by pre-loading instruction data into a cache circuit before it is actually needed for execution. The data reading control circuit reads target data information from storage regions in advance and stores it in the cache circuit, so that when channel switching occurs, the pipeline can continue processing without waiting for memory access, thereby eliminating read operation latency during channel switching.
Data Source
AI summary
A processing apparatus, a method and a system for executing data processing on a plurality of channels are disclosed. The processing apparatus for executing data processing on a plurality of channels includes: a channel information acquiring circuit, configured to acquire channel information of the plurality of channels; a storing circuit, including a plurality of storage regions corresponding to the plurality of channels, in which the storage regions are configured to store data information for the plurality of channels; a data reading control circuit, configured to read target data information corresponding to the channel information from a target storage region among the plurality of storage regions of the storing circuit, according to the channel information; and a cache circuit, configured to pre-store the target data information read from the target storage region of the storing circuit, by the data reading control circuit, to wait for use in the data processing.