Hi, not sure if the 282 GFLOPS number is correct.
We have 16 Bulldozer/Interlagos cores at 2.2 GHz. Each pair of cores forms a CMT module. The two cores in the module share an FPU with 2 128-bit FMAC units. In terms of double precision FLOPS it should make 16 * 2.2GHz * 2 double precision scalars/SIMD register * 2 FLOPS / FMA op = 140.8 GFLOPS It looks like 282 GFLOPS number is per a 2P node. Dima On 22 February 2018 at 21:37, Prentice Bisbal <pbis...@pppl.gov> wrote: > Beowulfers, > > In your experience, how close does actual performance of your processors > match up to their theoretical performance? I'm investigating a performances > issue on some of my nodes. These are older systems using AMD Opteron 6274 > processors. I found literature from AMD stating the theoretical performance > of these processors is 282 GFLOPS, and my LINPACK performance isn't coming > close to that (I get approximately ~33% of that). The number I often hear > mentioned is actual performance should be ~85%. of theoretical performance > is that a realistic number your experience? > > I don't want this to be a discussion of what could be wrong at this point, > we will get to that in future posts, I assure you! > > -- > Prentice > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf >
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