Cadence® system design and verification solutions, integrated under our Verification Suite, provide the simulation, acceleration, emulation, and management capabilities.
Verification Suite Related Products A-Z
Cadence® digital design and signoff solutions provide a fast path to design closure and better predictability, helping you meet your power, performance, and area (PPA) targets.
Full-Flow Digital Solution Related Products A-Z
Cadence® custom, analog, and RF design solutions can help you save time by automating many routine tasks, from block-level and mixed-signal simulation to routing and library characterization.
Overview Related Products A-Z
Driving efficiency and accuracy in advanced packaging, system planning, and multi-fabric interoperability, Cadence® package implementation products deliver the automation and accuracy.
Cadence® PCB design solutions enable shorter, more predictable design cycles with greater integration of component design and system-level simulation for a constraint-driven flow.
An open IP platform for you to customize your app-driven SoC design.
Comprehensive solutions and methodologies.
Helping you meet your broader business goals.
A global customer support infrastructure with around-the-clock help.
More Support Log In
24/7 Support - Cadence Online Support
Locate the latest software updates, service request, technical documentation, solutions and more in your personalized environment.
Cadence offers various software services for download. This page describes our offerings, including the Allegro FREE Physical Viewer.
The Cadence Academic Network helps build strong relationships between academia and industry, and promotes the proliferation of leading-edge technologies and methodologies at universities renowned for their engineering and design excellence.
Participate in CDNLive
A huge knowledge exchange platform for academia to network with industry. We are looking for academic speakers to talk about their research to the industry attendees at the Academic Track at CDNLive EMEA and Silicon Valley.
Come & Meet Us @ Events
A huge knowledge exchange platform for academia. We are looking for academic speakers to talk about their research to industry attendees.
Americas University Software Program
Join the 250+ qualified Americas member universities who have already incorporated Cadence EDA software into their classrooms and academic research projects.
EMEA University Software Program
In EMEA, Cadence works with EUROPRACTICE to ensure cost-effective availability of our extensive electronic design automation (EDA) tools for non-commercial activities.
Apply Now For Jobs
If you are a recent college graduate or a student looking for internship. Visit our exclusive job search page for interns and recent college graduate jobs.
Cadence is a Great Place to do great work
Learn more about our internship program and visit our careers page to do meaningful work and make a great impact.
Get the most out of your investment in Cadence technologies through a wide range of training offerings.
Overview All Courses Asia Pacific EMEANorth America
Instructor-led training [ILT] are live classes that are offered in our state-of-the-art classrooms at our worldwide training centers, at your site, or as a Virtual classroom.
Online Training is delivered over the web to let you proceed at your own pace, anytime and anywhere.
Exchange ideas, news, technical information, and best practices.
The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information.
It's not all about the technology. Here we exchange ideas on the Cadence Academic Network and other subjects of general interest.
Cadence is a leading provider of system design tools, software, IP, and services.
While PSS type simualtion of extracted netlist, it takes a lot of time ( like 12 to 14 hrs). ( IC5141,MMSIM12)
Is there any ways of running things so that the simulations can exploit the Multicores in the machine/workstation.
Did you try turning on "APS" in the Setup->High Performance Options form? You can control the number of threads that way too.
There's also the option to do parasitic reduction on this form.
Of course, it follows that you should ensure your PSS is set up appropriately too (you didn't give any details).
In reply to Andrew Beckett:
The query is not for a specific PSS set-up. It is generic. It is about how to exploit the machine resources and speed up the simulation.
I checked the Setup option in ADE.
But couldn't find the option "High Performance Options form". I could only see one option called TURBO/Parasitoc Reduction.
What is TURBO. I TURBO option form I am able to see Multithread option.
The Multicore option is NOT there.
Where I can get APS.
In reply to RFStuff :
Which version of spectre are you using (spectre -W from the command line), and which version of Virtuoso (either "icfb -W" or "virtuoso -W")? I suspect you're using too old versions (Spectre Turbo was an earlier enhancement to spectre and spectreRF to provide some speed up - it's now end of lifed as the functionality is superseded by the APS ("Accelerated Parallel Simulator") option to spectre/spectreRF.
I am currently using
Spectre: sub-version 10.1.1.200.isr13
icfb: sub-version 126.96.36.1990.6.132
Your IC version is too old. The high performance form (which replaces the Turbo/Parasitics form) was introduced in 188.8.131.520.6.141 (any later version would be OK too).
Without this you could enter +aps +mt=N on the userCmdLineOption field on Setup->Environment (where N is the number of threads you want - or just +mt if you want it to auto-choose).
Thanks a lot.
Is there any option to use multiple cores of the machine.
I installed the lattest ISR for IC5141.
The spectre version :sub-version 10.1.1.200.isr13
The icfb version:- sub-version 184.108.40.2060.6.151
Now I am getting the desired form for APS.
I have attched the snapshot of the form
It is asking for number of threads & Also process affinity ( is it for Number of cores).
Suppose I have 16 cores then what I should give to exploit all the cores
Do not fill in the process affinity - leave it blank. It's an esoteric option which can potentially give some extra speed, but it has to be used very carefully (the idea is that it allows you to tell the simulator which range of cores you want to "reserve" - the danger is that if you have multiple simulations reserving the same specific core numbers, it can end up being slower, of course). Without this the OS will take care of allocating cores (which may change over time depending on the machine loading).
If you specify the number of threads as "auto", it will pick up to 8 (depending on the machine having that number of cores, and the circuit being large enough to benefit from them). If "manual" you could specify 16 (or whatever number you want).
You should also select "APS" of course.
That's it - very simple.
Thanks a lot for your reply.
As you see there are thre otions in the form. Spectre, Turbo , APS.
I thinks APS can affect the accuracy.
I used Spectre but it takes maximum 8 cores and 8 threads.
Why spectre is taking maximum 8 cores.
Can you throw some light on these options.
Please upload (use the Options tab when replying) the spectre.out from your simulation; that way I can see what options you've picked, the size of your circuit, and any messages spectre will have given.
I have attched the spectre.out file. This simulation is currently running in APS mode and this is the corresponding spectre.out file.
However, I want the difference between Spectre, Turbo and APS, in performance and accuracy point of views.
OK, so it's not limited to 8 threads - you're running with 10 and it says it is running with 10. You have also set process affinity (although I advised you not to - you've actually set the processor affinity to wider than 10 CPUs - which is fine - but you need to be careful that there is not a second job running on the same machine with the same processor affinity; so bestnot to set it and let the OS take care of it).
Turbo is no longer in MMSIM (in MMSIM11.1 or MMSIM12.1 - as I said earlier, it was end of lifed.
There is discussion on APS in the documentation, and I suggest you read that. The idea with APS is that it doesn't compromise accuracy, but does provide accelleration by a combination of optimization techniques on what is being solved (e.g. filtering out parts of the circuit which will have no influence, such as dangling resistors, amongst other things), plus newer algorithms - e.g. a new matrix solver - plus smarter timestep placement - plus the ability to evaluate the device model code in parallel and also to do the matrix solve in parallel.
When I sent the spectre.out file. I was running the simulation in APS. APS takes as many cores as one can give. It can take all 16 cores of my machine.
However, if I run in Spectre option, It was taking maximum 8 cores. That is what I was aking: that Why spectre option is taking maximum 8 cores ?
I will look into the documents.
Sorry, to jot down another query( I feel it is relevant to add in this query:-
There is also option remote, local and distributed.
Is it possible to run remotely ( for example a server) through ssh ( I am using IC5141).
It looks like IC5141 can run remotely though rsh.