I think to some extent it matters what deal you can get. I got the vendor to throw in the interconnect if I got the right processors, which overall was a much better deal for us.
Matt On Fri, Mar 19, 2021 at 12:19 PM Blaise A Bourdin <[email protected]> wrote: > That would be great. > What would be even greater would be if I could run the same test on LSU > machines (Xeon 8260). > Blaise > > > On Mar 19, 2021, at 10:27 AM, Jed Brown <[email protected]> wrote: > > Blaise A Bourdin <[email protected]> writes: > > Hi, > > I am pricing out a new small cluster for my group and have been out of the > HW loop for a while. > Does anybody on the list have experience running petsc on recent > generation AMD EPYC? > I assume that the intel will not generate optimized code for non-intel > COU. How about gcc / clang? > My metric is not pure performance but rather performance over price. > > > I have a 2-socket 7452, which is a great price point for our sort of work. > If you're purely memory bandwidth-limited, you can get fewer cores, but > that doesn't save a lot of money. You'd probably want to compare pricing > with the new Zen 3 chips too. I'll forward you a log file from a multigrid > solver with some analysis. Suffice it to say, it matches to significantly > outperforms (depending on the operation) a 2-socket Xeon 8280. > > I do mostly implicit finite element codes and 90% of my walltime is KSP / > SNES solves > > Regards, > Blaise > > -- > A.K. & Shirley Barton Professor of Mathematics > Adjunct Professor of Mechanical Engineering > Adjunct of the Center for Computation & Technology > Louisiana State University, Lockett Hall Room 344, Baton Rouge, LA 70803, > USA > Tel. +1 (225) 578 1612, Fax +1 (225) 578 4276 Web > http://www.math.lsu.edu/~bourdin > > > -- > A.K. & Shirley Barton Professor of Mathematics > Adjunct Professor of Mechanical Engineering > Adjunct of the Center for Computation & Technology > Louisiana State University, Lockett Hall Room 344, Baton Rouge, LA 70803, > USA > Tel. +1 (225) 578 1612, Fax +1 (225) 578 4276 Web > http://www.math.lsu.edu/~bourdin > > -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
