[gmx-developers] Alingment & NULL pointers

[Mark Abraham]

... and tested on our supported compilers, once we have our new testing
support levels decided.

Mark

On Fri, Sep 4, 2015 at 12:05 PM Berk Hess <hess at kth.se> wrote:

> Hi,
>
> They should not only be aligned at the start, but also padded at the end
> up to SIMD register width alignment such that SIMD loops can read and
> write without masking at the end.
>
> Cheers,
>
> Berk
>
> On 2015-09-04 12:01, Erik Lindahl wrote:
> > Hi,
> >
> > Yes, aligned allocators should be on our todo-list :-)
> >
> > Cheers,
> >
> > ERik
> >
> >> On 04 Sep 2015, at 11:57, David van der Spoel <spoel at xray.bmc.uu.se>
> wrote:
> >>
> >> With the impending requirement of C++11 the use of NULL is deprecated
> (as I just found out). However we still are dependent on smalloc and
> friends to give us aligned memory for the inner loops, which means we have
> to deal with malloc and free for handling pointers.
> >>
> >> The stackoverflow page below suggests a way of aligning std::vector
> under the hood, which would have the advantage that we could use
> std::vector without having to worry about memory management. Is that
> something we should consider?
> >>
> >>
> http://stackoverflow.com/questions/8456236/how-is-a-vectors-data-aligned
> >>
> >> --
> >> David van der Spoel, Ph.D., Professor of Biology
> >> Dept. of Cell & Molec. Biol., Uppsala University.
> >> Box 596, 75124 Uppsala, Sweden. Phone:       +46184714205.
> >> spoel at xray.bmc.uu.se    http://folding.bmc.uu.se
> >> --
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