PSS 3.1 Public Review Now Open

The Portable Stimulus Standard (PSS) 3.1 Draft Standard is available for public review, giving the design and verification community an opportunity to review the latest enhancements to PSS and provide feedback before its release.

PSS 3.1 is a focused release that builds on the capabilities of PSS 3.0, with updates concentrated in four key areas:

• A stronger constraint language – Enhancements that provide greater flexibility and control when defining constraints.
• More reusable libraries – Improvements that make it easier to create practical, reusable PSS libraries that can be shared across projects and teams.
• Greater control over generated target code – New capabilities that give models more control over what is produced for target implementations.
• Address spaces and registers – Updates that close gaps and strengthen modeling capabilities in the address and register layer.

The public review provides an opportunity for the industry to evaluate the specification and provide feedback before it is finalized. The Portable Stimulus Working Group invites comments and feedback through its Community Forum.

The document is available for download at Accellera's Drafts Under Public Review page. The public review period is open until September 30, 2026. For more information about PSS and the development of the standard, visit the Portable Stimulus Working Group page.

 

PSS Training Session 10 Now Available!

In Session 11 of Accellera’s “Learning PSS” video series, Tom Fitzpatrick, PSS expert and charter member of Accellera’s Portable Stimulus Working Group, explores PSS memory allocation and how memory planning at solve time helps create valid verification scenarios.

Learn how PSS models different types of storage using address spaces and address regions, specifies allocation requirements using address claims, and enables the solver to allocate memory based on action, data flow, and capacity requirements—before simulation begins.

In this session, you’ll learn:

• Why memory allocation is performed at solve time in PSS
• How PSS models memory and other storage elements using address spaces
• How address traits and regions represent different types of storage
• How address claims define memory allocation, alignment, compatibility, and lifetime requirements
• How the solver prevents overlapping memory allocations
• How solve-time memory planning helps avoid runtime memory conflicts

Watch Session 11 to learn how PSS memory allocation, address spaces, address regions, and address claims work together to create verification scenarios that meet your system’s storage requirements.

Next week continue the series with Session 12, covering the PSS realization layer. 

For details about PSS and other resources, visit the Portable Stimulus Working Group page.

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