[Wien] lapw2c tries to read an anomalous amount of data

[Laurence Marks]

How much RAM do you have?

It sounds to me as if on your system the active memory is being paged out,
i.e. you are using swap space and/or you have issues with cached memory not
being released. If you only have 1 9Gb file then there should be no
problem; if you have many there might be. You may want to try
lapw2_vector_split:2 if you are using mpi.

Since nobody else to my knowledge has reported a similar problem, and I for
one have never seen anything similar it seems to be very specific to
whatever you are doing and your OS.

I suspect some incorrect OS parameters, maybe some noisy memory and/or disc.

On Thu, Jul 25, 2019 at 7:12 PM Luc Fruchter <luc.fruchter at u-psud.fr> wrote:

> So, my understanding of the situation is that lapw1 may create .vector
> files that are larger than the amount of memory needed by the lapw1 step.
> At the lapw2 step, the program must handle these files with less memory
> than needed, hence these physical / cached unefficient readings.
> This sounds annoying, as one cannot immediately detect the memory need
> for the case, from a try with the beginning of a scf cycle, as I use to do.
> _______________________________________________
> Wien mailing list
> Wien at zeus.theochem.tuwien.ac.at
>
> https://urldefense.proofpoint.com/v2/url?u=http-3A__zeus.theochem.tuwien.ac.at_mailman_listinfo_wien&d=DwICAg&c=yHlS04HhBraes5BQ9ueu5zKhE7rtNXt_d012z2PA6ws&r=U_T4PL6jwANfAy4rnxTj8IUxm818jnvqKFdqWLwmqg0&m=zVyRqNsJ3IaYoIt3zsG4BuXlCqwyCWaFWNojNEOe1TY&s=MkBuvyViyVHKizcxYYtmvWcFcmRVDxNVimYKD_pygww&e=
> SEARCH the MAILING-LIST at:
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.mail-2Darchive.com_wien-40zeus.theochem.tuwien.ac.at_index.html&d=DwICAg&c=yHlS04HhBraes5BQ9ueu5zKhE7rtNXt_d012z2PA6ws&r=U_T4PL6jwANfAy4rnxTj8IUxm818jnvqKFdqWLwmqg0&m=zVyRqNsJ3IaYoIt3zsG4BuXlCqwyCWaFWNojNEOe1TY&s=9INzrH6X_5PrnK3FqMOUluUo3eDgBEtwFhBSZShfG1I&e=
>


-- 
Professor Laurence Marks
Department of Materials Science and Engineering
Northwestern University
www.numis.northwestern.edu
Corrosion in 4D: www.numis.northwestern.edu/MURI
Co-Editor, Acta Cryst A
"Research is to see what everybody else has seen, and to think what nobody
else has thought"
Albert Szent-Gyorgi
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://zeus.theochem.tuwien.ac.at/pipermail/wien/attachments/20190725/20ffab0a/attachment.html>