Multi-Socket Processor Reconfiguration for Independent Bootstrap Booting
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Solution Overview
Problem
Current information handling systems face challenges in efficiently transitioning from multi-socket modes to multi-single socket modes, particularly in adapting CPU straps, power sequencing, and bus re-direction to optimize processor roles and reduce costs in demanding workloads.
Innovation Solution
The system receives a request to switch from a multi-socket mode to a multi-single socket mode by placing each socket in an auxiliary power state and altering parameters such as CPU straps, power sequencing, and bus re-direction, allowing each processor to function as a bootstrap processor, enabling independent operation and resource sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the system switches from multi-socket mode to multi-single socket mode by placing each socket in auxiliary power state and altering parameters, then cost is reduced and processor roles are optimized, but the complexity of mode switching and parameter alteration increases
Solution Approach 1:
The system performs preliminary actions by placing each socket in an auxiliary power state before the actual mode switching occurs. This preparatory step allows the system to alter CPU straps, power sequencing, and bus re-direction in a controlled manner, reducing the complexity of the overall transition process while achieving cost optimization through efficient processor role assignment.
Solution Approach 2:
The system dynamically adjusts multiple parameters including CPU straps, power sequencing, and bus re-direction during the mode switching process. This dynamic adaptation allows the system to transition smoothly from multi-socket mode to multi-single socket mode, managing complexity through flexible, real-time parameter modification rather than static reconfiguration.
2Adaptability or versatility
If each socket is placed in auxiliary power state independent of each other, then processor roles can be optimized and costs reduced, but the control and coordination complexity increases
Solution Approach 1:
The system segments the control of each socket, placing them in auxiliary power states independently rather than as a unified group. This segmentation allows each processor to be optimized for its specific role (bootstrap or application processor) while maintaining independent control, reducing the coordination complexity that would arise from managing all sockets as a single unit.
Solution Approach 2:
Each socket is configured with local quality adjustments specific to its intended processor role. Bootstrap processors receive specific parameter configurations different from application processors, allowing optimal performance for each role. This localized optimization achieves versatility in processor functionality while keeping control complexity manageable through role-based configuration rather than global reconfiguration.
3Productivity
If parameters such as CPU straps, power sequencing, and bus re-direction are altered, then mode switching efficiency is improved, but the risk of system instability increases
Solution Approach 1:
The system alters parameters in a predetermined sequence, starting with placing sockets in auxiliary power states before modifying CPU straps, power sequencing, and bus re-direction. This preliminary action ensures that each parameter change occurs in a controlled state, improving mode switching efficiency while minimizing system instability risks through systematic progression rather than simultaneous changes.
Solution Approach 2:
The system implements feedback mechanisms during parameter alteration to monitor system stability. By observing system responses as CPU straps, power sequencing, and bus re-direction are modified, the system can adjust the switching process in real-time, maintaining efficiency while preventing instability. The feedback loop ensures that parameter changes produce the desired mode transition without compromising system reliability.
Data Source
AI summary
Methods, systems, and computer programs encoded on computer storage medium, for receiving a request to switch a mode of an information handling system (IHS) from a multi-socket mode to a multi-single socket mode; in response to receiving the request, placing each socket of the IHS in an auxiliary power state independent of each other; after placing each socket of the IHS in the auxiliary power state, altering parameters of the sockets of the IHS, including: altering CPU straps, power sequencing, reset sequencing, and bus re-direction associated with one or more of the sockets of the IHS; and in response to altering the parameters of the sockets of the IHS, switching the mode of the IHS from the multi-socket mode to the multi-single socket mode such that a processor for each socket is a bootstrap processor.