Hypervisor I/O Request Aggregation for Bandwidth Reduction
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Solution Overview
Problem
In virtualization environments, existing methods for handling input/output (I/O) requests are inefficient, leading to high network bandwidth consumption due to the transmission of multiple messages, which can result in suboptimal resource utilization and increased protocol overhead.
Innovation Solution
A method where a hypervisor receives I/O requests from a ring buffer, aggregates them if the total size is less than the maximum transmission unit, and generates a combined message with reduced protocol overhead, thereby minimizing network bandwidth consumption by forwarding a single message to the I/O target.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple I/O requests are transmitted as separate messages, then each request can be processed independently, but network bandwidth consumption increases due to repeated protocol overhead
Solution Approach 1:
The patent merges multiple I/O requests into a single aggregated message when the aggregate size is less than the maximum transmission unit. This combines multiple small requests that would otherwise each incur separate protocol overhead, reducing total network bandwidth consumption while maintaining processing integrity through proper request delimitation and parsing
2Loss of energy
If I/O requests are aggregated into combined messages, then network bandwidth consumption and protocol overhead are reduced, but the complexity of message handling increases
Solution Approach 1:
The patent segments the aggregated message into individual I/O requests using delimiters or length fields that allow the hypervisor to parse and process each request independently. This segmentation approach maintains simplicity by providing clear boundaries between requests while still benefiting from the overhead reduction of aggregated transmission
3Productivity
If I/O requests are aggregated, then resource utilization improves, but the time to process and aggregate requests increases
Solution Approach 1:
The patent implements a timeout mechanism that triggers message aggregation after a predetermined period if requests continue to arrive. This periodic action allows the system to balance aggregation benefits against processing delays, ensuring that aggregated messages are transmitted in a timely manner while still achieving bandwidth optimization
Data Source
AI summary
A method of efficient message transmission includes a hypervisor receiving a first input/output (I/O) request from a ring buffer; receiving a second I/O request from the ring buffer; receiving an absence of further I/O requests from the ring buffer; comparing an aggregate size of a first message and the second I/O request to a maximum transmission unit, wherein the first message comprises the first I/O request and a first protocol overhead; generating a combined message, in response to the aggregate size of the first message and the second I/O request being less than the maximum transmission unit. The combined message comprises the first I/O request, the second I/O request, and the first protocol overhead; and forwarding the combined message to an I/O target.