You can save a lot of power in a design by gating clocks. For much of the time in a complex multi-function design, many (often most) of the clocks are toggling registers whose input values aren’t changing. Which means that those toggles are changing nothing functionally yet they are still burning power. Why not turn off those clock… Read More
Power has become a very important metric in modern designs – for mobile and IoT devices which must live on a battery charge for days or years, for datacenters where power costs can be as significant as capital costs, and for increasingly unavoidable regulatory reasons. But accurate power estimation on a design must start from an … Read More
When I first saw that Rob Knoth (Product Director at Cadence) had proposed this topic as a subject for a blog, my reaction was “well, how accurate can that be?” I’ve been around the power business for a while, so I should know better. It’s interesting that I jumped straight to that one metric for QoR; I suspect many others will do the same.… Read More
For a while it seemed like Mentor lived on the margins of the (RTL) design-for-power game. They had interesting micro-architectural optimization capabilities through their Calypto heritage but no real industry chops in power estimation, a must-have when you are claiming to reduce power. Better known offerings in RTL power … Read More
I had a debate with Steve Carlson of Cadence earlier in the year at the EDPS conference on whether there were really any truly effective solutions for doing power estimation in emulation. I thought there weren’t and he said I was wrong. After attending the Cadence front-end summit last week, I have to admit he has a point.
First, who… Read More
At the Cadence front-end summit last week, Jay Roy presented the Cadence Joules solution for RTL (and gate-level) power estimation. Jay is ex-Apache, so knows his way around RTL power estimation which should make Joules a product to watch. Joules connects very natively to Palladium for power characterization for realistic software… Read More
If we look at the past, most of the EDA tools in the semiconductor design space have originated from a designers’ need to do things faster. Regardless of whether it is design exploration, manual design, simulation, verification, optimization (Power Performance Area – PPA) and many other steps in the overall design flow.… Read More