[CP2K-user] [CP2K:16767] Re: Question about COSMA

Ole Schütt ole.schuett at cp2k.org
Thu Mar 24 21:20:30 UTC 2022

Hi Hongyang,

we have been puzzled by this mysterious slowdown as well 
<https://github.com/cp2k/cp2k/issues/1826>. Yesterday we finally had a 
breakthrough: You have to remove `-lgslcblas` from your ARCH file to ensure 
that the proper BLAS library gets linked.


On Thursday, March 24, 2022 at 10:51:19 AM UTC+1 ma455... at gmail.com wrote:

> Hi,
> I'm just wondering are there any advantages of using COSMA instead 
> of SCALAPACK for matrix multiplication? I found the speed of using COSMA is 
> slower than SCALAPACK in SCF calculation.
> Thanks,
> Hongyang

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