GfsOutputTiming

From Gerris

Revision as of 09:06, 3 November 2010 Taoye (Talk | contribs) ← Previous diff		Current revision GeordieMcBain (Talk | contribs) (added the "syntax in parameter files" bit, and smoothed grammar)
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-	OutputTiming gives a summary of time consuming of the simulation including the simulation speed measured in how many grids* timesteps can be done per second.	+	GfsOutputTiming summarizes the time consumption of the simulation including the simulation speed measured in how many node-timesteps can be done per second.
-	for example
-	[ Timing summary: 5 timesteps 20507 node.timestep/s ]	+	The syntax in parameter files is:
-	means it is the 5th timestep, currently 20507 grids*timestep can be done in one second. If your simulation scale is 40 000 grids (static) and 100 timesteps, the estimated simulation time is <math>$\frac{40 000 grids \times 100 steps}{20507 grid.timestep/s}=195s$</math> .	+	[ [[GfsOutput]] ]
		+
		+
		+	For example, the first line of output might read:
		+
		+	Timing summary: 5 timesteps 20507 node.timestep/s
		+
		+	which means that it is the 5th timestep and currently 20507 node-timesteps can be done in one second. If the grid contains 40 000 node (static) and 100 timesteps are to be taken, the estimated simulation time is 40 000 nodes by 100 steps / (20507 node.timestep/s) = 195 s.
		+
		+	Subsequent lines give a more detailed breakdown of this.
		+
		+	<examples/>

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Current revision

GfsOutputTiming summarizes the time consumption of the simulation including the simulation speed measured in how many node-timesteps can be done per second.

The syntax in parameter files is:

[ GfsOutput ]

For example, the first line of output might read:

 Timing summary: 5 timesteps 20507 node.timestep/s 

which means that it is the 5th timestep and currently 20507 node-timesteps can be done in one second. If the grid contains 40 000 node (static) and 100 timesteps are to be taken, the estimated simulation time is 40 000 nodes by 100 steps / (20507 node.timestep/s) = 195 s.

Subsequent lines give a more detailed breakdown of this.

Examples

• B\'enard--von K\'arm\'an Vortex Street for flow around a cylinder at Re=160

  OutputTiming { start = end } stderr

• Vortex street around a "heated" cylinder

  OutputTiming { start = end } stderr

• Parallel simulation on four processors

  OutputTiming { start = end } stderr

• Rayleigh-Taylor instability

  OutputTiming { start = end } stderr

• Boussinesq flow generated by a heated cylinder

  OutputTiming { start = end } stderr

• Viscous folding of a fluid interface

    OutputTiming { start = end } stderr

• Turbulent air flow around RV Tangaroa

  OutputTiming { start = end } stderr

• Savart--Plateau--Rayleigh instability of a water column

    OutputTiming { istep = 100 } stderr

• Atomisation of a pulsed liquid jet

    OutputTiming { istep = 100 } log

• Air-water flow around a Series 60 cargo ship

    OutputTiming { istep = 10 } stderr

• Tsunami runup onto a complex three-dimensional beach

    OutputTiming { start = end } stderr

• The 2004 Indian Ocean tsunami

    OutputTiming { istep = 100 } stderr

• Cyclone-generated wave field

    OutputTiming { istep = 100 } stderr