Non-Host Processing Device Control Paths for Lower-Latency Coordination
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Solution Overview
Problem
Existing computing environments face inefficiencies in task execution due to host-centric control paths that limit the scalability and efficiency of non-host processing devices, leading to increased latency and resource burden on host processing devices.
Innovation Solution
Implementing peer-to-peer control path communications between non-host processing devices using Compute Express Link (CXL) 3.0 and CXL 3.1, or a software overlay on PCIe, to reduce the involvement of host processing devices in data transfers, allowing non-host processing devices to communicate directly and coordinate execution flows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If host-centric control path is used for communication between non-host processing devices, then system management and coordination is simplified, but communication latency increases and host processing resources are consumed
Solution Approach 1:
The patent introduces a peer-to-peer control path mechanism that acts as an intermediary between non-host processing devices, allowing them to communicate directly without routing all control signals through the host. This reduces latency by eliminating host-mediated communication steps while maintaining system coordination through the established peer-to-peer protocols.
Solution Approach 2:
The control path is segmented into two types: host-centric paths for management functions and peer-to-peer paths for data transfer coordination. This segmentation allows critical data communication to occur independently of host processing, reducing latency for time-sensitive operations while the host retains oversight for system-level management.
2Device complexity
If host processing device coordinates all data transfers between non-host processing devices, then system coordination is centralized and simplified, but host processing resources are burdened and scalability is limited
Solution Approach 1:
Non-host processing devices are equipped with the capability to autonomously coordinate data transfers between themselves using peer-to-peer control paths. Each device can independently initiate and manage data exchange operations without requiring host intervention, thereby freeing host resources and enabling the system to scale to more devices without proportionally increasing host coordination overhead.
Solution Approach 2:
The patent adds a new dimension to the communication architecture by introducing peer-to-peer control paths that operate parallel to the traditional host-centric paths. This creates a multi-dimensional communication topology where control signals can traverse different paths depending on the operation type, enabling scalable system growth without overloading the host coordination layer.
3Productivity
If peer-to-peer control path communication is implemented between non-host processing devices, then communication performance and scalability are improved, but control path complexity increases
Solution Approach 1:
The peer-to-peer control path mechanism is designed with universal protocols that can be applied across different types of non-host processing devices and communication scenarios. This multi-functionality allows the same control path infrastructure to handle various data transfer operations, reducing the need for device-specific control logic and managing complexity through standardized interfaces.
Data Source
AI summary
In certain embodiments, a computer-implemented method includes receiving, by a first non-host processing device from a host processing device, configuration information for configuring the first non-host processing device. The method includes receiving, by the first non-host processing device, computer code; receiving, by the first non-host processing device, a first trigger to execute a portion of the computer code; and executing, in response to the first trigger, the portion of the computer code. The method includes writing, by the first non-host processing device and based at least in part on the execution of the portion of the computer code, data to a destination buffer of a second non-host processing device; and sending, by the first non-host processing device and in response to writing the data to the destination buffer, a second trigger to the second non-host processing device to cause the second non-host processing device to execute second computer code.