LASYNC - Revision history

Miranda.henrique at 08:12, 19 July 2022

2022-07-19T08:12:41Z

← Older revision		Revision as of 08:12, 19 July 2022
Line 3:		Line 3:
	Description: Controls the overlap in communication.		Description: Controls the overlap in communication.
	----		----
	If {{TAG\|LASYNC}}=''.TRUE.'' is set in the INCAR file, VASP will try to overlap communication with calculations. This ~~switch is only supported in VASP~~.~~4.5~~ and ~~newer releases, its use is however not recommended, since {{TAG\|LASYNC}}=''.TRUE.'' has not been tested carefully~~.		If {{TAG\|LASYNC}}=''.TRUE.'' is set in the INCAR file, VASP will try to overlap communication with calculations.
			This might improve performance or degrade it depending on the MPI library and hardware you are running on.
	~~Overlapping communication and calculations, might improve performance~~ a ~~little bit, but it~~ is ~~also possible that the~~ performance ~~drops significantly~~. Please ~~try yourself~~.		Please do your own testing and compare the runtimes and results before using this tag in production runs.
			Compiling VASP using the [[Precompiler_options#-DPROFILING\|-DPROFILING]] precompiler switch provides a detailed timing of the different VASP routines which helps in determining if there is a performance gain.
			Please report any issues in the [https://www.vasp.at/forum/ VASP forum].

	{{sc\|LASYNC\|Examples\|Examples that use this tag}}		{{sc\|LASYNC\|Examples\|Examples that use this tag}}

Karsai at 08:11, 19 July 2022

2022-07-19T08:11:48Z

← Older revision		Revision as of 08:11, 19 July 2022
Line 1:		Line 1:
	{{TAGDEF\|LASYNC\|[logical]\|.FALSE.}}		{{TAGDEF\|LASYNC\|[logical]\|.FALSE.}}

	Description: ~~This tag controls~~ the overlap in communication.		Description: Controls the overlap in communication.
	----		----
	If {{TAG\|LASYNC}}=''.TRUE.'' is set in the INCAR file, VASP will try to overlap communication with calculations. This switch is only supported in VASP.4.5 and newer releases, its use is however not recommended, since {{TAG\|LASYNC}}=''.TRUE.'' has not been tested carefully.		If {{TAG\|LASYNC}}=''.TRUE.'' is set in the INCAR file, VASP will try to overlap communication with calculations. This switch is only supported in VASP.4.5 and newer releases, its use is however not recommended, since {{TAG\|LASYNC}}=''.TRUE.'' has not been tested carefully.

Karsai at 07:44, 19 July 2022

2022-07-19T07:44:44Z

← Older revision		Revision as of 07:44, 19 July 2022
Line 5:		Line 5:
	If {{TAG\|LASYNC}}=''.TRUE.'' is set in the INCAR file, VASP will try to overlap communication with calculations. This switch is only supported in VASP.4.5 and newer releases, its use is however not recommended, since {{TAG\|LASYNC}}=''.TRUE.'' has not been tested carefully.		If {{TAG\|LASYNC}}=''.TRUE.'' is set in the INCAR file, VASP will try to overlap communication with calculations. This switch is only supported in VASP.4.5 and newer releases, its use is however not recommended, since {{TAG\|LASYNC}}=''.TRUE.'' has not been tested carefully.

	Overlapping communication and calculations, might improve performance a little bit, but it is also possible that the performance drops significantly. Please try yourself~~, and send a brief report to Georg.Kresse@univie.ac.at~~.		Overlapping communication and calculations, might improve performance a little bit, but it is also possible that the performance drops significantly. Please try yourself.

	{{sc\|LASYNC\|Examples\|Examples that use this tag}}		{{sc\|LASYNC\|Examples\|Examples that use this tag}}

Karsai at 14:26, 8 April 2022

2022-04-08T14:26:37Z

← Older revision		Revision as of 14:26, 8 April 2022
Line 10:		Line 10:
	----		----

	[[Category:INCAR]][[Category:Performance]][[Category:parallelization]]		[[Category:INCAR tag]][[Category:Performance]][[Category:parallelization]]

Karsai at 17:48, 11 March 2019

2019-03-11T17:48:26Z

← Older revision		Revision as of 17:48, 11 March 2019
Line 9:		Line 9:
	{{sc\|LASYNC\|Examples\|Examples that use this tag}}		{{sc\|LASYNC\|Examples\|Examples that use this tag}}
	----		----
	~~[[The_VASP_Manual\|Contents]]~~

	[[Category:INCAR]][[Category:Performance]][[Category:parallelization]]		[[Category:INCAR]][[Category:Performance]][[Category:parallelization]]

Karsai at 17:46, 11 March 2019

2019-03-11T17:46:17Z

← Older revision		Revision as of 17:46, 11 March 2019
Line 11:		Line 11:
	[[The_VASP_Manual\|Contents]]		[[The_VASP_Manual\|Contents]]

	[[Category:INCAR]][[Category:parallelization]]		[[Category:INCAR]][[Category:Performance]][[Category:parallelization]]

Karsai at 18:07, 1 March 2019

2019-03-01T18:07:36Z

← Older revision		Revision as of 18:07, 1 March 2019
Line 11:		Line 11:
	[[The_VASP_Manual\|Contents]]		[[The_VASP_Manual\|Contents]]

	[[Category:INCAR]]		[[Category:INCAR]][[Category:parallelization]]

Karsai at 10:06, 20 March 2017

2017-03-20T10:06:19Z

← Older revision		Revision as of 10:06, 20 March 2017
Line 7:		Line 7:
	Overlapping communication and calculations, might improve performance a little bit, but it is also possible that the performance drops significantly. Please try yourself, and send a brief report to Georg.Kresse@univie.ac.at.		Overlapping communication and calculations, might improve performance a little bit, but it is also possible that the performance drops significantly. Please try yourself, and send a brief report to Georg.Kresse@univie.ac.at.

			{{sc\|LASYNC\|Examples\|Examples that use this tag}}
	----		----
	[[The_VASP_Manual\|Contents]]		[[The_VASP_Manual\|Contents]]

	[[Category:INCAR]]		[[Category:INCAR]]

Karsai at 12:15, 16 January 2017

2017-01-16T12:15:45Z

← Older revision		Revision as of 12:15, 16 January 2017
Line 1:		Line 1:
	{{TAGDEF\|LASYNC\|[logical]\|.FALSE.}}		{{TAGDEF\|LASYNC\|[logical]\|.FALSE.}}

	Description: ~~If {{TAG\|LASYNC}}= ''.TRUE.'' is set in~~ the ~~INCAR file, VASP will try to~~ overlap communication ~~with calculations~~.		Description: This tag controls the overlap in communication.
	----		----
	This switch is only supported in VASP.4.5 and newer releases, its use is however not recommended, since {{TAG\|LASYNC}}=''.TRUE.'' has not been tested carefully.		If {{TAG\|LASYNC}}=''.TRUE.'' is set in the INCAR file, VASP will try to overlap communication with calculations. This switch is only supported in VASP.4.5 and newer releases, its use is however not recommended, since {{TAG\|LASYNC}}=''.TRUE.'' has not been tested carefully.

	Overlapping communication and calculations, might improve performance a little bit, but it is also possible that the performance drops significantly. Please try yourself, and send a brief report to Georg.Kresse@univie.ac.at.		Overlapping communication and calculations, might improve performance a little bit, but it is also possible that the performance drops significantly. Please try yourself, and send a brief report to Georg.Kresse@univie.ac.at.

Karsai: Created page with "{{TAGDEF|LASYNC|[logical]|.FALSE.}} Description: If {{TAG|LASYNC}}= ''.TRUE.'' is set in the INCAR file, VASP will try to overlap communication with calculations. ---- This s..."

2017-01-16T12:14:45Z

Created page with "{{TAGDEF|LASYNC|[logical]|.FALSE.}} Description: If {{TAG|LASYNC}}= ''.TRUE.'' is set in the INCAR file, VASP will try to overlap communication with calculations. ---- This s..."

New page

{{TAGDEF|LASYNC|[logical]|.FALSE.}}

Description: If {{TAG|LASYNC}}= ''.TRUE.'' is set in the INCAR file, VASP will try to overlap communication with calculations.
----
This switch is only supported in VASP.4.5 and newer releases, its use is however not recommended, since {{TAG|LASYNC}}=''.TRUE.'' has not been tested carefully.

Overlapping communication and calculations, might improve performance a little bit, but it is also possible that the performance drops significantly. Please try yourself, and send a brief report to Georg.Kresse@univie.ac.at.

----
[[The_VASP_Manual|Contents]]

[[Category:INCAR]]