CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

How to evaluate the calculation time of CFX case

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 13, 2016, 01:51
Default How to evaluate the calculation time of CFX case
  #1
New Member
 
Frank
Join Date: Jan 2016
Posts: 16
Rep Power: 8
unclewallcn is on a distinguished road
Dear all,

More haste ,less speed.

If I can get the calculation time about CFX cases, I will work more efficient.

Quote:
How to evaluate the calculation time of CFX case?
Thank you!
unclewallcn is offline   Reply With Quote

Old   April 13, 2016, 05:23
Default
  #2
Senior Member
 
Maxim
Join Date: Aug 2015
Location: Germany
Posts: 410
Rep Power: 10
-Maxim- is on a distinguished road
I do not understand your question? What are you trying to achieve? Have you looked up definitions of simulation time, CPU time, etc?
-Maxim- is offline   Reply With Quote

Old   April 16, 2016, 22:08
Default
  #3
New Member
 
Frank
Join Date: Jan 2016
Posts: 16
Rep Power: 8
unclewallcn is on a distinguished road
Take an example ,I defined a case(def) and than how long is it to get its results(res)?Thank you for your kindness
unclewallcn is offline   Reply With Quote

Old   April 17, 2016, 07:35
Default
  #4
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 16,921
Rep Power: 132
ghorrocks is just really niceghorrocks is just really niceghorrocks is just really niceghorrocks is just really nice
In the output file there are two groups of timing statistics reported.

At the very end of the output file is the total time. This is the time taken for setting up, doing the simulation and packing up at the end. Wall clock and CPU time are reported.

A second time is reported after the iterations but before the final balances and residuals is written. This is the wall clock and CPU time taken for just the simulation iterations.

When you do benchmarking you will find the setting up and packing up are often very hard drive intensive and do not scale in parallel simulations, as most of the work is done on the master node. But the simulation time should be only CPU time and should scale with the number of parallel nodes.

So most multi-processor benchmarking is done using the simulation time, not the total time.
ghorrocks is offline   Reply With Quote

Reply

Tags
cfx 17.0

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Is Playstation 3 cluster suitable for CFD work hsieh OpenFOAM 9 August 16, 2015 15:53
Superlinear speedup in OpenFOAM 13 msrinath80 OpenFOAM Running, Solving & CFD 18 March 3, 2015 06:36
same geometry,structured and unstructured mesh,different behaviour. sharonyue OpenFOAM Running, Solving & CFD 13 January 2, 2013 23:40
Could anybody help me see this error and give help liugx212 OpenFOAM Running, Solving & CFD 3 January 4, 2006 19:07
Warning 097- AB Siemens 6 November 15, 2004 05:41


All times are GMT -4. The time now is 12:10.