editor's blog
Subscribe Now

Power Contributors

At the recent Si2 conference, there was an interesting presentation by IBM’s David Hathaway on what is hoped to be a better way of approaching power modeling at the technology level.

He said that power modeling can be approached differently from delay modeling. With delay, there are numerous effects that combine in complex, non-linear ways, and so a full characterization of each cell is necessary. But with power, because interpolation is risky, many more points are needed, making full characterization a really time-consuming chore.

The good news, he proposed, is that the elements contributing to power can be separated out as more or less orthogonal to each other. Specific power contributors can be isolated, and then each cell can be defined in terms of its contributors. Only the contributors have to be characterized (tens of tests rather than hundreds), and then they can be summed cell by cell.

In an experiment to test this theory out, they compared the calculated value with full-up actual values. 95% of the simulations that would have normally been needed were eliminated, and the average error was 0.073%, with the worst-case error being 3.64%.

There’s more work to be done both at the dynamic and leakage level, but it felt like there’s some promise to this approach, with the potential of making it easier to create new technology models.

Leave a Reply

featured blogs
Jan 17, 2020
I once met Steve Wozniak, or he once met me (it's hard to remember the nitty-gritty details)....
Jan 17, 2020
[From the last episode: We saw how virtual memory helps resolve the differences between where a compiler thinks things will go in memory and the real memories in a real system.] We'€™ve talked a lot about memory '€“ different kinds of memory, cache memory, heap memory, vi...
Jan 16, 2020
While Samtec started as a connector company with a focus on two-piece, pin-and-socket board stacking systems, High-Speed Board Stacking connectors and High-Speed Cable Assemblies now make up a significant portion of our sales. To support development in this area, in December ...
Jan 16, 2020
Betting on Hydrogen-Powered Cars On-demand DRC within P&R cuts closure time in half for MaxLinear Functional Safety Verification For AV SoC Designs Accelerated With Advanced Tools Automating the pain out of clock domain crossing verification Mentor unpacks LVS and LVL iss...

Featured Video

Automotive Trends Driving New SoC Architectures -- Synopsys

Sponsored by Synopsys

Today’s automotive trends are driving new design requirements for automotive SoCs targeting ADAS, gateways, connected cars and infotainment. Find out why it is essential to use pre-designed, pre-verified, reusable automotive-optimized IP to meet such new requirements and accelerate design time.

Click here for more information about DesignWare IP for Automotive