The semiconductor industry is undergoing a period of dramatic transformation. Designs are getting larger, and with multi-die architectures, design complexity is increasing even further. To ensure robust design quality, the required verification is increasing exponentially. Engineering teams are under constant pressure to deliver quality designs under shrinking time to market, yet many organizations still rely on EDA licensing and compute models created decades ago—models that often slow down rather than accelerate chip development.
The combination of Synopsys FlexEDA Pay-Per-Use (PPU) licensing and HPE GreenLake Flex Solutions changes this paradigm. Together, they deliver a modern, secure, on-premises environment with the elasticity and efficiency of cloud consumption. This blog explores how this hybrid approach accelerates regressions, improves design quality, and meaningfully reduces time-to-market.
ASIC development is inherently iterative and compute-intensive. Every design cycle involves specification, RTL creation, verification, synthesis, physical design, signoff, and Engineering Change Order (ECO) loops. Each stage places different, often unpredictable, demands on compute and EDA license resources.
Traditional approaches create several persistent challenges:
Fueled by rising demand for software-defined hardware such as AI accelerators, as designs expand into technology domains like 2nm/3nm, chiplets (multi-die), limitations of traditional models amplify schedule risk and inhibit engineering efficiency.
The Synopsys FlexEDA licensing model represents a fundamental shift from traditional static licensing. In addition to being able to purchase a fixed number of licenses, engineering teams can now leverage highly scalable EDA tools on-demand by the minute.
Key benefits of FlexEDA Pay-Per-Use (PPU) include:
The result is an EDA licensing model aligned with the dynamic nature of semiconductor design development and one that supports scalability and maximizes efficiency.
While FlexEDA PPU removes EDA licensing limitations, compute capacity may emerge as the next constraint. HPE GreenLake Flex Solutions addresses this by delivering on-premises infrastructure with cloud-like elasticity.
HPE GreenLake Flex Solutions uses a two-tier capacity model:
This architecture has several advantages:
Together, Synopsys FlexEDA licensing and HPE GreenLake Flex Solutions form a highly flexible environment where licensing and compute expand in concert with engineering demand, all while preserving the security required for design development.
The combination of FlexEDA licensing and elastic on-premises compute unlocks new workflows that were impossible under traditional models. When the HPE Slingshot ASIC team deployed FlexEDA PPU on HPE GreenLake Flex Solutions, the impact on regression and coverage acceleration was measurable and immediate.
Regressions were run using fixed (TSL) and PPU for three unique design blocks. As seen in all three runs, with PPU EDA licenses, the duration of regression runs reduced substantially.
Regressions on a 1st design block
Regressions on 2nd design block
Regressions on 3rd design block
Regression |
Hours saved / day |
Hours saved / week |
Hours saved / month |
Design Block 1 |
14 |
98 |
420 |
Design Block 2 |
12 |
84 |
360 |
Design Block 3 |
12 |
84 |
360 |
Regression Duration Savings with FlexEDA PPU
To summarize, FlexEDA PPU helps re-engineer verification regressions by offering four key capabilities:
Massive Parallelization
Under fixed license quantities, only a limited number of verification, extraction, and sign-off EDA jobs can run simultaneously. With FlexEDA PPU, teams can fully parallelize workloads, thereby cutting idle engineering time and accelerating closure, all on-demand. With parallelization, hundreds of simulation jobs run simultaneously, dramatically shrinking total runtime.
Scaling for Peak Workloads
During intense phases such as tape-out, ECO rushes, or nightly regressions, teams can burst to hundreds of licenses and compute slots. Unlike traditional licensing, fixed pool nightly regressions took 8 to 36 hours, often spilling into the next day. With the new method, regression duration dropped roughly to the length of the longest test, because all shorter jobs are completed in parallel. With PPU, regressions completed overnight, bounded mainly by the longest test.
Rethinking Regression Methodology
When licenses are no longer the limiting factor, the entire regression strategy can evolve. Teams can:
This shift moves verification from a capacity-limited model to a quality-optimized model. One of the HPE ASIC teams ran regression for more than 20 hours, so the team had to wait for a full day to get the coverage results. With FlexEDA PPU:
Over the course of a project, this compounds into significant schedule acceleration.
Faster ECO and Bug Fix Validation
With immediate access to licenses and compute, engineers can do fixes in near real-time rather than waiting for regressions to run overnight. This accelerates closure and reduces schedule risk.
Adopting Synopsys FlexEDA PPU and HPE GreenLake Flex Solutions introduces new opportunities, but also new operational considerations.
Compute Sizing
Teams should find the right balance of HPE GreenLake Flex Solutions reserve and variable capacity based on regression counts, number of testcases, and acceptable completion windows.
Hardware Performance
EDA license cost typically outweighs compute cost. Faster compute reduces total license minutes consumed, making modern and scalable hardware critical when using FlexEDA PPU licensing.
Job Launch Throughput
To fully use high compute slot counts, the job scheduling infrastructure must be tuned to launch hundreds or thousands of jobs rapidly. Bottlenecks here can undermine the benefits of PPU parallelization.
Cost Governance
On-demand, Pay-Per-Use licensing introduces a need for:
Different tests consume dramatically different simulation minutes, making visibility essential for budget planning. Synopsys FlexEDA provides a GUI-based platform to monitor EDA PPU usage, along with governance capabilities, to ensure access and budget is controlled tightly.
Despite its advantages, FlexEDA PPU isn't meant to replace term-based EDA licensing entirely. Term-based Cloud Subscription Licenses (CSL) are also available with FlexEDA. Similarly for compute, HPE GreenLake Flex Solutions is not intended to replace on-prem compute infrastructure. Instead, it augments compute capacity when there is an on-demand need. Many organizations will benefit from a hybrid model.
This combination ensures cost-effective baseline capacity while enabling unlimited elasticity during peak periods.
As software-defined hardware continues to evolve, traditional fixed EDA licenses and static on-premises compute infrastructure are not well-suited to meet the demands of scale, speed, and agility. As chip designs become more complex and time-to-market windows shrink, these established models create bottlenecks that slow the pace of innovation and introduce schedule risk.
Synopsys FlexEDA Pay-Per-Use licensing, combined with HPE GreenLake Flex Solutions, provides a secure, flexible, consumption-based design environment that unlocks massive parallelization capabilities, resulting in faster regressions, shorter coverage cycles, and more agile engineering workflows.
Chip design teams striving to improve productivity, optimize costs, accelerate time-to-market, and ensure first pass silicon success, while keeping all proprietary design IP in-house, will find this solution offers a compelling path forward.