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POSIX/AOS Delta DocumentOpen Systems Project Engineering Conference (OSPEC) FY 98 Status Review 29 April - 1 May 1998: 

POSIX/AOS Delta Document Open Systems Project Engineering Conference (OSPEC) FY 98 Status Review 29 April - 1 May 1998

Background: 

Background Background: JSF, OS-JTF, DISA (AJPO), and USAF Wright Lab funded Hughes to evaluate and determine the suitability of the POSIX and AOS APIs, and Ada 95 features for real-time embedded software Areas of Interest: availability, performance, security, and supportability tradeoffs Provide a Delta Document comparing POSIX, AOS and Ada 95 (1996 - 1997) Received Funding to pursue implementation of the Delta Document Findings (1998 ) The Delta Document provides information needed to decide if POSIX is feasible in real-time military avionics?

The Delta Document Flow: 

The Delta Document Flow

SAE-AS5 OS API WG Requirements: 

SAE-AS5 OS API WG Requirements

API Comparison: 

API Comparison Functionality- 17 Functional Areas Based on fulfilling 75% of The Requirements in a Functional Area Requirements- 277 Total Requirements 17 Functional Areas Failed, Unknown, and Not Applicable Req’s not Counted As Fulfilled

Category 1: POSIX Meets The Requirements: 

Category 1: POSIX Meets The Requirements

Category 2: POSIX Nearly Meets Requirements: 

Category 2: POSIX Nearly Meets Requirements Findings: The POSIX Capability for the majority of Communication was Unknown at the Time of The Evaluation. NOTE: Need to review the POSIX Distributed Communication Standard Recommendations: Compare Distributed Comm with Delta Document requirements Recommend The Implementation of Ada Bindings of Any Relevant Requirements.

Category 3: POSIX Should Address: 

Category 3: POSIX Should Address

Category 4: POSIX Should Not Address: 

Category 4: POSIX Should Not Address

Ada’s Real Time Capabilities: 

Ada’s Real Time Capabilities (F-14) (F-15) (F-18) Others (B-2) (JSF) (F-22) (Commanche)

The Trend in Application Programming I/Fs (API): 

The Trend in Application Programming I/Fs (API) Ada + POSIX Real-Time Functionality Lacking in OS, POSIX, and Ada Considerable Overlap in OS, POSIX, and Ada Ada + POSIX High Order Functionality in Ada General OS Functionality in POSIX Hardware Specific Functionality in RTOS

FY98 Planned Tasks: 

FY98 Planned Tasks Task 1: Support The OSJTF Test Suite Industry Wide Certification Program. Beta Test Conformance Statement Questionnaire Task 2: Support POSIX Real-Time Standard. Bring Delta Doc findings to RT System Services WG Write PARs and participate in WG Task 3: Update the Delta Document and provide to JSF. Update Delta Doc to include RT Distributed Communication Provide to JSF for DII/COE RT consideration