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

[Pavel Ondračka]

Just out of curiosity, how do you measure the current disc usage per
process?

Also, how large is your memory consumption? Very high disc IO (and bad
speed in general) can also be associated with swapping. lapw2 can be
the most memory intensive part of the scf cycle.

Best regards
Pavel

On Tue, 2019-07-02 at 19:10 +0200, Luc Fruchter wrote:
> I am facing a problem with lapw2c on a machine running the 18.2
> version 
> of Wien2k. I suspect this is a machine problem, rather than a Wien2k 
> one, but would like to be sure:
> 
> As lapw2c runs in parallel in a cycle, the lapw2c processes will all
> try 
> to read a very large amount of data from the disk (several hundred
> Gb), 
> so keeping the system busy endless.
> 
> As the input files for lapw2c (.energy, .vector) are only a few Gb,
> this 
> reading of hundred Gb seems suspect, and rather a disk problem.
> However, 
> all lapw2c routines experience the same problem when run in
> parallel, 
> which I would not expect if the reading of one file was problematic.
> 
> On the other hand, the first cycles ran without any trouble.
> 
> Thanks
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