On Fri, Mar 24, 2017 at 8:43 AM, Eloisa Bentivegna < [email protected]> wrote:
> Hi all, > > still on the KNL topic, I realize there was a question I ignored, and > which perhaps is worth pursuing. > > On 01/03/17 21:43, Ian Hinder wrote: > > Eloisa: does Carpet report the vector size of the KNL as 8? From the > > wikipedia entry, I would expect that to be the case, but I think you > > mentioned to me that it was reporting 4. > > That's correct. In my output I find: > > =============================================================== > INFO (Vectors): Using vector size 4 for architecture AVX (64-bit precision) > =============================================================== > > Is this not supposed to be so? And in this case, is there anything I can > do about it? > You should see a vector size of 8, and a message containing "AVX512 (64-bit precision)". If you do not do this, then there is a problem with the compiler options -- this decision is made at compile time. You might need to specify "-march=knl" to GCC, or a similar option to the Intel compiler, or you could build on a KNL node and use "-march=native" or "-xHost". -erik > Eloisa, are you using LoopControl? > > Yes. > > Eloisa > _______________________________________________ > Users mailing list > [email protected] > http://lists.einsteintoolkit.org/mailman/listinfo/users > -- Erik Schnetter <[email protected]> http://www.perimeterinstitute.ca/personal/eschnetter/
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