Microprocessor Context Duplication for Faster VM Instantiation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In cloud or distributed computing environments, the startup time for software applications is significantly impacted by the loss of microarchitectural context information during cloning or migration, as this information, such as virtual to physical memory translations and branch prediction histories, needs to be reconstructed, slowing down the instantiation process.
Innovation Solution
A microprocessor with logic to duplicate and transfer microarchitectural context information, including TLB and branch predictor data, during cloning, migration, or storage, allowing the new processor or virtual machine to use this information for faster instantiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If microarchitectural context information is copied and instantiated multiple times in cloud or distributed computing environment, then application startup time is reduced, but device complexity increases
Solution Approach 1:
The patent applies the copying principle by duplicating microarchitectural context information (such as TLB entries, branch predictor states, and other processor micro-architectural data) from a source virtual machine to a destination virtual machine. This allows the destination VM to instantiate applications faster by reusing pre-warmed microarchitectural data instead of starting from a cold state, directly reducing application startup time while managing system complexity through structured data replication
Solution Approach 2:
The patent implements preliminary action by pre-warming the microarchitectural context information before migration or cloning operations. The source processor executes instructions to populate TLB, branch predictors, and other microarchitectural structures in advance, so that when the VM is migrated or cloned, the destination processor receives already-optimized context data. This preliminary preparation reduces the time penalty associated with cold starts and minimizes the performance impact of system complexity
2Productivity
If microarchitectural context information is transferred during migration, then instantiation speed is improved, but loss of information is reduced
Solution Approach 1:
The patent uses copying to replicate microarchitectural context information including translation lookaside buffer (TLB) entries, branch predictor histories, and other processor state data from source to destination during migration. This comprehensive copying ensures that no critical context information is lost, while the destination processor can immediately utilize this data to achieve fast instantiation without reconstructing microarchitectural state from scratch
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of a structured data transfer protocol that captures, serializes, and transmits microarchitectural context information between source and destination processors. This intermediary layer ensures complete and accurate transfer of context information while enabling efficient instantiation at the destination, simultaneously improving productivity and preventing information loss through systematic data mediation
Data Source
AI summary
Aspects of the technology are directed to methods and systems that enable duplication of micro-architectural context information when a running application is cloned (e.g., for a faster function start up), migrated (e.g., to another core or machine), or persisted into secondary storage. The method, for example, may comprise extracting microarchitectural information from a first processing element, transferring the extracted microarchitectural information to a first operating system, forwarding, by the first operating system, the extracted microarchitectural information to a second processing element, and instantiating a process at the second processing element using the extracted microarchitectural information.