[CP2K:5004] libsmm rebuild after upgrade

[Ole Schütt]

Hi Jörg,

> I was wondering, would it make sense to separate the libsmm from the 
> cp2k tree
> as a sub-project? That way if there are changes we know that quicker? 
> Just an
> idea.

Actually, we are currently working on separating DBCSR from CP2K to make 
it available as a standalone library. This will then also include 
libsmm.

For the meantime, you don't really have to worry. Libsmm itself is 
pretty much converged. Unless your compiler or hardware changes there is 
not need to re-optimize.

-Ole



On 2014-02-28 13:26, Jörg Saßmannshausen wrote:
> Hi Ian,
> 
> thanks! That saves me quite a bit of time here.
> 
> I was wondering, would it make sense to separate the libsmm from the 
> cp2k tree
> as a sub-project? That way if there are changes we know that quicker? 
> Just an
> idea.
> 
> All the best from a still grey London!
> 
> Jörg
> 
> On Friday 28 Feb 2014 10:59:43 Iain Bethune wrote:
>> Hi Jorg,
>> 
>> There is no need to rebuild libsmm - your existing one will work fine 
>> with
>> CP2K 2.5.0.  There have been some changes in libsmm, but mostly 
>> relating
>> to vectorisation for Intel Xeon Phi.  Assuming you are still on the 
>> same
>> architecture, you can keep using the same libsmm.
>> 
>> Cheers
>> 
>> - Iain
>> 
>> --
>> 
>> Iain Bethune
>> Project Manager, EPCC
>> 
>> Email: ibet... at epcc.ed.ac.uk
>> Twitter: @IainBethune
>> Web: http://www2.epcc.ed.ac.uk/~ibethune
>> Tel/Fax: +44 (0)131 650 5201/6555
>> Mob: +44 (0)7598317015
>> Addr: 2404 JCMB, The King's Buildings, Mayfield Road, Edinburgh, EH9 
>> 3JZ
>> 
>> On 28 Feb 2014, at 10:53, Jörg Saßmannshausen 
>> <j.sassma... at ucl.ac.uk>
> wrote:
>> > Dear all,
>> >
>> > just a quick question regarding libsmm as I am upgrading from version
>> > 2.4.0 to 2.5.0. Do I need to rebuild the libsmm every time there is a
>> > new version of cp2k out or is this part 'stable', i.e. there are no
>> > changes any more? I am asking as the build takes some time and I would
>> > like to avoid doing that on our cluster here.
>> >
>> > All the best from a grey London!
>> >
>> > Jörg
> 
> --
> *************************************************************
> Jörg Saßmannshausen
> University College London
> Department of Chemistry
> Gordon Street
> London
> WC1H 0AJ
> 
> email: j.sassma... at ucl.ac.uk
> web: http://sassy.formativ.net
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