Hello<\/p>\n
I do ANSYS Mechanical on a minor company that does not have a budget for Xeon\/Epyc clusters, and I am very interested in the upcoming AMD Threadripper Pro.<\/p>\n
AVX-512 and 8-channel RAM, moderate price sounds nice. I may even manage to convince my boss to cash up for a HPC pack so we can use more cores – although Mechanical does not scale as well as CFD with more cores, it is the 16-core CPUs I am interested in.<\/p>\n
The one thing I wonder about is this: on my current Ryzen I had to enable a system setting – “MKL_DEBUG_CPU_TYPE=5” to make ANSYS utilize the AVX2 functionality, which right about doubled performance.<\/p>\n
As I understand, this is because ANSYS is compiled with an Intel compiler that only sees AVX on Intel CPUs, and ignores it on AMD CPUs unless that setting is enabled. Intel’s excuse is that they cannot guarrantee that the functionality of other CPUs comply with the expected behavior, which is a weak argument since there is supposedly established standards and the onus is on AMD to follow them. Considering the extensive reliance on other-party libraries in the software world, nothing would work if programmers followed Intels logic here, so I can only assume it is deliberate to make AMD CPUs perform worse.<\/p>\n
So my question is really for ANSYS to answer: will we be able to use the Threadripper Pro 7000 series with AVX-512 extensions without<\/em> having to rely on compiler workaround hacks this time?<\/p>\n Thanks for any input.<\/p>\n","protected":false},"template":"","class_list":["post-233116","topic","type-topic","status-closed","hentry","topic-tag-ansys-mechanical"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t