Multi-Port Host Adapter Port Testing via Concurrent Thread Scheduling

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Solution Overview

Problem

Conventional port testing methods for multi-port host adapters are inefficient, as they require taking all ports offline, leading to significant delays and downtime, as they are designed for single-port adapters and do not allow non-tested ports to continue processing I/O communications during testing.

Innovation Solution

The implementation of a scheduler and multithreading module that divides the port test routine into independent threads, allowing simultaneous testing of multiple ports while keeping non-tested ports online for I/O communications, and configuring the adapter once for testing and then reconfiguring it for regular operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional port testing methods are used for multi-port host adapters, then all ports must be taken offline for testing, but this causes significant delays and downtime

Engineering Contradiction:
Improvetesting accuracyVSAvoidtesting time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The patent divides the port testing process into separate threads for each port, allowing individual ports to be tested independently while other ports remain operational. The test routine is segmented into port-specific operations that can execute concurrently without requiring all ports to be taken offline simultaneously.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent enables non-tested ports to continue processing I/O communications during the testing of other ports. By maintaining continuous operation of unaffected ports, the system minimizes downtime and ensures that useful work continues throughout the testing process rather than halting all operations.

Inventive Principle:
Principle #20Continuity of useful action

2Reliability

If all ports are taken offline for testing, then testing can be performed, but system performance and I/O communications are severely impacted

Engineering Contradiction:
Improvetesting completenessVSAvoidI/O communication throughput
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The testing process is segmented by port, with each port having its own test thread. This segmentation allows the system to test only the specific ports that need verification while leaving other ports available for normal I/O communications, thus maintaining productivity during testing.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Instead of taking all ports offline for testing, the patent applies partial action by testing only the necessary ports while keeping others operational. This selective approach ensures testing completeness for required ports without unnecessarily impacting overall system productivity.

Inventive Principle:
Principle #16Partial or excessive action

3Ease of manufacture

If conventional single-port testing routines are applied to multi-port adapters, then testing is simple to implement, but all ports must be taken offline causing downtime

Engineering Contradiction:
Improvetesting implementation simplicityVSAvoidadapter downtime
Core Design Contradiction:
Ease of manufactureVSLoss of time

Solution Approach 1:

The patent merges multiple single-port test routines into a unified multi-threaded testing framework. By combining individual port tests into concurrent threads managed by a single test initiation, the system maintains implementation simplicity while enabling parallel execution that reduces overall downtime.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The test module is designed with universal functionality to handle multiple ports simultaneously through thread management. This multi-functional approach allows the same testing infrastructure to service any combination of ports on the multi-port adapter without requiring separate testing procedures for each port.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS7480840B2Apparatus, system, and method for facilitating port testing of a multi-port host adapter
Publication Date: 2009.01.20 GLOBALFOUNDRIES US INC
  • US7480840B2 patent drawing
  • US7480840B2 patent drawing
  • US7480840B2 patent drawing

AI summary

An apparatus, system, and method are provided for facilitating port testing of a multi-port host adapter. The present invention includes a scheduler that schedules execution of a plurality of threads to test a first port and a plurality of threads to test a second port of a multi-port adapter. The port test routine is divided into threads such that execution time and switching overhead is minimized. A multithreading module provides multithreaded execution of the plurality of threads such that the port test of the first port and the port test of the second port are performed in parallel. The apparatus further includes a communication module that takes the first port and the second port off-line. A third port remains on-line for Input/Output (I/O) communications that are multithreaded with the plurality of threads involving the first port and the second port.