June 17, 2021 at 5:28 amAndyJPSubscriber
I can not believe my eyes. All the past year I was struggling with Driven Modal solver never using more than 2 cores at 100%, regardless of available 4+4 HPC licenses. I.e., I could get normal performance only in frequency Sweeps. Both in EDT2020R1, and in EDT2021R1.
The answer is: we had BASIC license, without optimetrics and other candies.June 29, 2021 at 2:23 pmmannyAnsys EmployeeIs this a question or a rant? Sounds like a rant to me.
June 30, 2021 at 12:35 amAndyJPSubscriberThat is an active disagreement with your policy. If you sell the product, sell it transparently please, without hidden limitations for second-sort customers.
June 30, 2021 at 4:35 amAndyJPSubscriber//If it is a bug of license management, that it should be fixed ASAP in my opinion.
July 1, 2021 at 11:40 pmmannyAnsys EmployeeHi Andy All the cores that you specify are always used during the simulation and this is independent of enabling the Pro Pre Ent licensing option setting.Regardless of whether you set that option or not, if you check use automatic settings within HPC, and specify the desired number of cores to say 4, HFSS will use all of those 4 cores during adaptive meshing and also for the frequency sweep.Core usage information is also explicitly written out in the HFSS simulation profile.
July 2, 2021 at 12:30 amAndyJPSubscriberI know how it is in theory and how it was starting from ver 15.
Earlier, I usually was setting 8 cores and 2 tasks; because in earlier versions 4 cores were giving out optimal performance. Anyway, during initial solution, before the sweep, only one task is used (no domain distribution).
As you see above, I had serious problems with CPU load distribution, where only 2 cores of 8 were loaded, and other 6 were idle almost all the time, except results copy/fetch phase, where OS distributes many small disk IO operations.
The day we upgraded to Premium, I finally got a uniform full load for all the CPU cores, and the corresponding performance.
So I have a natural suspicion that you updated DrivenModal solver operates differently under different types of license, regardless of available HPCs number.
Viewing 5 reply threads
Ansys Innovation Space
- You must be logged in to reply to this topic.
Simulation World 2022
Check out more than 70 different sessions now available on demand. Get inspired as you hear from visionary companies, leading researchers and educators from around the globe on a variety of topics from life-saving improvements in healthcare, to bold new realities of space travel. Take a leap of certainty and check out a session today here.
Earth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.Trending discussions
- Signing up as ANSYS Support Coordinator
- simulation completed with execution error on server
- How to export Ansys Maxwell simulation results for post-processing in matlab or in .csv file
- Maxwell, HFSS or Q3D?
- Running ANSYS HFSS on the HPC (it runs on Linux only)
- Number of parallel paths in Ansys Maxwell
- Illegal External Terminal – assigning current to a coil
- Unable to assign correctly the excitations in a coil
- Domain Decomposition in HFSS
Top Rated Tags
© 2022 Copyright ANSYS, Inc. All rights reserved.Ansys does not support the usage of unauthorized Ansys software. Please visit www.ansys.com to obtain an official distribution.