Posts Tagged ‘graph-based’
Wednesday, May 11th, 2016
The title of last week’s post was a play on a Mark Twain quote. This week I draw from a more contemporary source: The Muppets. Some episodes of the legendary family TV show featured a skit called “Pigs in Space.” In my head I’m reading “SoCs in Space!” with the same booming intonation used on the show for “Pigs in Space” to lead into a somewhat more serious discussion about the use of advanced chips in extreme conditions.
My prompt for this particular post came not from TV, but from an announcement yesterday that VORAGO Technologies is offering an ARM-based microcontroller (MCU) “designed specifically for radiation and extreme temperature operation without up-screening.” In other words, they ship an MCU that’s ready to use in such traditionally challenging environments as automobiles and industrial controllers as well as, yes, space. That got me thinking about even more complex chips such as SoCs and the extreme conditions they might have to face.
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Tags: Breker, bring-up lab, C/C++, cache coherency, constraints, emulation, ESL, FPGA, functional verification, graph, graph-based, military grade, multi-SoC, portable stimulus, prototyping, rad-hardened, radiation-hardened, realistic use case, scenario model, SoC verification, space, system-on-chip, test case generator, test cases
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Thursday, May 5th, 2016
With a nod to Mark Twain, this week I’d like to comment on a recent three–part series with the provocative title “Are Simulation’s Days Numbered?” The articles were transcribed from one of the “experts at the table” events that SemiconductorEngineering does so well. Breker wasn’t involved in this particular roundtable, but I enjoyed reading the series and found that it stirred up some thoughts. As a blogger, of course I’m going to share them with you and I hope you enjoy them in turn.
Let’s get this out of the way immediately: in three parts and more than 5,000 words, there was no mention of portable stimulus. That might not seem too surprising given the title, but in fact verification portability both from IP to system and from simulation to hardware arose during the discussion. So I’ll comment on that but, given my background as a vendor of formal EDA tools and reusable IP blocks, there are a few other topics that also piqued my interest.
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Tags: Accellera, Adapt IP, Breker, bring-up lab, C/C++, cache coherency, Cadence, constraints, emulation, ESL, FPGA, functional verification, graph, graph-based, IP, multi-SoC, OneSpin, portable stimulus, prototyping, PSWG, realistic use case, Rizzatti, scenario model, simulation, SoC validation, SoC verification, Synopsys, system-on-chip, SystemVerilog, test case generator, test cases
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Tuesday, April 26th, 2016
Ever since Accellera started the Portable Stimulus Working Group (PSWG), this emerging technology has generated a lot of buzz both within the EDA industry and among our semiconductor and systems customers. As the pioneer in this technology we get a lot of questions about what portable stimulus is, why it is different from the Universal Verification Methodology (UVM) and other established approaches, and why anyone would need it.
We’ve devoted quite a few posts to this topic in The Brekker Treker blog, stretching back two years to when Accellera first set up a proposed working group (PWG) to survey the industry and decided whether standardization of portable stimulus was feasible and desirable. Given the many posts scattered throughout the past two years, we thought that we would take this opportunity to give readers new to this topic a guided tour of the information that we have available.
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Tags: Accellera, Breker, bring-up lab, C/C++, cache coherency, Cadence, Cavium, constraints, dvcon, DVCon India, EDACafe, emulation, ESL, FPGA, functional verification, graph, graph-based, mentor, multi-SoC, portable stimulus, prototyping, PSWG, scenario model, simulation, SoC validation, SoC verification, system-on-chip, SystemVerilog, test case generator, test cases
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Tuesday, April 19th, 2016
As I discussed at last week, there are many different engineering roles involved in the development of a large, complex semiconductor device. The EDA industry attempts to serve nearly all of these groups, from the architects and product marketing engineers who dream up the new ideas to the technicians who test production parts on the factory floor. Today I’m focusing on the work of two of EDA’s most traditional customer bases: hardware designers and hardware verification engineers.
Perhaps I’d better explain my title. It comes from an old expression “we went to different schools together” that I remember hearing as a youngster. Sometimes this refers to two people who didn’t actually attend the same school but who are nevertheless longtime close friends. But I’ve also heard it used to refer to two people who did in fact go to school together but had very different experiences. This latter context is the one I have mind for design and verification engineers who work on the same project yet inhabit different worlds.
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Tags: Accellera, assertions, Breker, code coverage, coverage, dvcon, EDA, formal analysis, functional coverage, functional verification, graph, graph-based, IP, portable stimulus, PSWG, reuse, scenario model, SemiconductorEngineering, simulation, SoC verification, system coverage, test generator, uvm
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Wednesday, April 13th, 2016
I expect that the activities of the EDA Consortium (EDAC), our industry’s main trade organization, are followed more closely by EDA vendors than users. However, some of you may have seen the recent publicity surrounding the organization’s name change to the Electronic System Design Alliance (ESDA). I applaud this move because it reflects the gradual but ongoing merger of EDA and embedded systems, a topic that we have covered here on The Breker Trekker in the past.
However, I do have two reservations about the specifics of the name change. First, as some people have pointed out, “ESD” is strongly associated with “electrostatic discharge” for us engineers who have worked on actual lab benches and not just in the world of abstract EDA models. But that’s a minor quibble as far as I’m concerned. My bigger issue is that EDAC did not use the name change as a chance to expand from “design” to “development” in its description of scope. Please continue reading as I expand a bit on all three of these points.
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Tags: Bob Smith, Breker, dac, Design Automation Conference, EDA, EDA Consortium, EDAC, embedded systems, ESD Alliance, ESDA, functional verification, graph, graph-based, hardware, IoT, portable stimulus, scenario model, simulation, SoC verification, software
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Wednesday, March 30th, 2016
For those of us who have been in the EDA business on one side or the other (or both), the Design Automation Conference (DAC) is one of the highlights of every year. I almost hate to admit it, but this year holds DAC number 29 for me. I’ve been to San Francisco, San Diego, Los Angeles, Anaheim, Las Vegas, Dallas, New Orleans, and Orlando, most of them multiple times. But one of the most fun locations was Austin, where DAC was held for the first time three years ago, and where we will return in just a few short months.
There will be plenty of time later for us to fill you in on what Breker will be doing at DAC this year. Since the program for the 53rd annual conference just went live, I thought I’d share some initial impressions and predict some likely highlights. Of course as an exhibitor I’m already deep in planning for the show, but I encourage all of you to review the program and start making your own plans. You’ll be sure to have lots of fun in Austin, and on the basis of the information available today I’m sure that this will be a great show.
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Tags: Accellera, austin, Breker, cache coherency, cloud, dac, Design Automation Conference, EDA, functional verification, graph, graph-based, IoT, NoC, portable stimulus, scenario model, simulation, SoC verification, uvm, VIP
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Thursday, March 24th, 2016
Last week, we used an update on the Accellera Portable Stimulus Working Group (PSWG) presented at the Design and Verification Conference and Exhibition (DVCon) as a jumping-off point to discuss the status of this standardization effort and some key aspects of the three proposals currently under consideration. We were not the only blog to cover portable stimulus topics from DVCon; Brian Bailey of SemiconductorEngineering and Bernard Murphy from SemiWiki also posted their observations.
Earlier this week, EDACafe blogger colleague Peggy Aycinena posted a thought-provoking look at PSWG and the portable stimulus challenge. In regards to the scope of the proposed standard, she noted “a distinct wow factor in all of this, it’s so comprehensive” and said “this whole effort seems massive to me.” Today we’d like to respond to Peggy’s comments and questions, noting both the challenges of a portable stimulus standard and the availability of a working solution today.
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Tags: Accellera, Breker, bring-up lab, C/C++, cache coherency, Cadence, constraints, EDACafe, emulation, ESL, FPGA, functional verification, graph, graph-based, mentor, multi-SoC, Peggy Aycinena, portable stimulus, prototyping, PSWG, scenario model, SemiconductorEngineering, SemiWIki, simulation, SoC validation, SoC verification, system-on-chip, SystemVerilog, test case generator, test cases
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Wednesday, March 16th, 2016
As all of our regular readers are aware, the software-driven SoC verification space pioneered by Breker is becoming more of a mainstream approach every day. One good barometer for the industry shift now underway is the standardization effort in progress within the Accellera Portable Stimulus Working Group (PSWG). The amount of interest in this standard has skyrocketed recently, and portable stimulus was a hot topic at the Design and Verification Conference and Exhibition (DVCon) two weeks ago.
As we promised when we first began discussing the PSWG, we don’t believe in sharing internal details of standardization work in a public blog. However, the group was offered a slot to present an update at an Accellera-sponsored lunch during DVCon. So the PSWG put together a set of slides with information to share publicly and Vice-Chair Tom Fitzpatrick of Mentor did a nice job of presenting them. For those of you who could not attend, we’ll summarize the current status in today’s blog post.
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Tags: Accellera, Breker, bring-up lab, C/C++, cache coherency, Cadence, constraints, dvcon, emulation, ESL, FPGA, functional verification, graph, graph-based, mentor, multi-SoC, node coverage, portable stimulus, prototyping, PSWG, realistic use case, scenario model, simulation, SoC validation, SoC verification, system-on-chip, SystemVerilog, test case generator, test cases, use-case coverage, vayavya
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Thursday, March 3rd, 2016
We’ve just returned from our most important trade show of the year: the Design and Verification Conference and Exhibition (DVCon) in San Jose. Sure, DAC is a bigger show, but it covers all of EDA and so lacks the front-end digital focus of DVCon. We previewed the event over our last few blog posts and today we’d like to summarize what happened and make a prediction or two about how this particular DVCon will affect the industry.
The biggest news for us was that portable stimulus seemed to be on everyone’s lips this year. Many of the engineers who stopped by to visit our booth had heard the term and were aware that the Accellera Portable Stimulus Working Group (PSWG) is developing a standard. If they didn’t know what portable stimulus was, they almost surely knew by the end of the show.
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Tags: Accellera, application, Breker, bring-up lab, cache coherency, Cadence, Cavium, dvcon, emulation, ESL, FPGA, functional verification, graph, graph-based, mentor, multi-SoC, node coverage, path coverage, portable stimulus, prototyping, PSWG, realistic use case, scenario model, simulation, SoC validation, SoC verification, system-on-chip, test case generator, test cases, TrekApp, TrekSoC-Si, Universal Verification Methodology, use-case coverage, uvm
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Wednesday, February 24th, 2016
We hope that the title of this blog post piqued your interest, because we don’t believe that we’ve seen anyone anywhere claiming to do automated multi-SoC verification at this level. Two weeks ago, we previewed next week’s Design and Verification Conference and Exhibition (DVCon) in San Jose. We highlighted one particular talk being co-presented by Breker and Cavium on “Using Portable Stimulus to Verify Cache Coherency in a Many-Core SoC” in the 9:00-10:30 a.m. session on Tuesday, March 1.
We teased you with the statement that this talk will describe “generating test cases for a multi-SoC configuration with well over 100 cores” and it’s time to tell you a bit more now that we have issued a press release on our project with Cavium. Of course, we need to reserve some of the details for the paper in the DVCon proceedings and the talk itself so that new material is being presented at the conference. We heartily encourage you at attend the show and hear for yourself.
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Tags: application, Breker, bring-up lab, cache coherency, Cavium, dvcon, emulation, FPGA, functional verification, graph, graph-based, multi-SoC, node coverage, path coverage, portable stimulus, prototyping, PSWG, realistic use case, scenario model, simulation, SoC validation, SoC verification, system-on-chip, test case generator, test cases, TrekSoC-Si, Universal Verification Methodology, use-case coverage, uvm
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