Programmable IC Plugin Hot-Swapping Without Kernel Downtime
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Solution Overview
Problem
Current programmable integrated circuits (ICs) face limitations in dynamically modifying a kernel or plugin without affecting the operation of other kernels, leading to downtime and reduced flexibility in supporting multiple users and functions concurrently.
Innovation Solution
The implementation of a programmable IC with a static region and dynamic regions, allowing for the dynamic modification of user-specified circuits within partial reconfiguration regions, enabling the modification of one kernel without disrupting other kernels by sending messages, clearing resources, and isolating memory access, while allowing other regions to continue operating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a plugin is modified in a programmable IC, then the plugin functionality is updated, but all other plugins must be brought down and the hardware swapped out
Solution Approach 1:
The programmable IC is divided into multiple independent reconfigurable regions, each capable of hosting a separate plugin. This segmentation allows one region to be reconfigured while other regions continue operating independently, eliminating the need to bring down all plugins for a single plugin modification.
Solution Approach 2:
The system performs preliminary actions by allocating dedicated reconfigurable regions for each plugin before operation begins. This pre-configuration enables hot-swapping capability where plugins can be modified in advance or replaced dynamically without affecting other running plugins, as each has its own isolated reconfigurable space.
2Adaptability or versatility
If the hardware is swapped out to load a different plugin, then the new plugin functionality is achieved, but downtime occurs for all users
Solution Approach 1:
The system implements dynamic reconfiguration capability where the programmable logic can be changed while the system remains operational. Multiple reconfigurable regions can be modified at different times without requiring complete hardware swaps, enabling continuous operation and eliminating downtime for plugin modifications.
Solution Approach 2:
The system maintains continuous operation of other plugins during reconfiguration events. By isolating reconfigurable regions and allowing independent modification, the useful action of other plugins continues uninterrupted, eliminating the downtime that would otherwise occur during plugin loading or modification.
3Productivity
If multiple users share a NIC with a programmable IC, then resource utilization is improved, but plugin modification affects all users
Solution Approach 1:
The programmable IC is segmented into multiple independent reconfigurable regions that can be allocated to different users. Each user can modify their assigned plugin in their dedicated region without affecting other users' plugins, enabling independent operation while maintaining shared resource utilization.
Solution Approach 2:
Each reconfigurable region has localized configuration capabilities that are independent of other regions. This local quality allows user-specific modifications to be applied in one region without propagating changes or disruptions to other regions, enabling ease of operation for each user while maintaining productive resource sharing.
Data Source
AI summary
Techniques and apparatus for dynamically modifying a kernel (and associated user-specified circuitry) for a dynamic region of a programmable integrated circuit (IC) without affecting (e.g., while allowing) operation of other kernels ((and other associated user-specified circuitry) in the programmable IC. Dynamically modifying a kernel may include, for example, unloading an existing kernel, loading a new kernel, or replacing a first kernel with a second kernel). In the case of networking (e.g., in a data center application) where the programmable IC may be part of a hardware acceleration card (e.g., a network interface card (NIC)), the kernel may be user code referred to as a “plugin.”