Codejock Developer Community : TabClientWnd using lots of CPU http://forum.codejock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Tue, 16 Jun 2026 04:14:02 +0000 Sun, 14 Jan 2007 03:53:12 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 forum.codejock.com/RSS_post_feed.asp?TID=6090 <![CDATA[Codejock Developer Community]]> http://forum.codejock.com/forum_images/codejock-logo.gif http://forum.codejock.com/ <![CDATA[TabClientWnd using lots of CPU : mgampi wrote:Hi Dan; This...]]> http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19295&title=tabclientwnd-using-lots-of-cpu#19295 Author: Simon HB9DRV
Subject: 6090
Posted: 14 January 2007 at 3:53am

Originally posted by mgampi mgampi wrote:

Hi Dan;
 
This virtual function determines whether a message in the message queue is a message good for idle processing or not. If this function returns TRUE, the OnIdleUpdate... processing is done (OnUpdateCommandUI() handlers are called).
In the default implementation WM_TIMER messages are defined as 'idle' messages, resulting in OnUpdateCommandUI() calls.
In my application, each mdi child window has started its own timer and the timer interval is about 200ms. This means that after opening one window, the OnUpdateCommandUI() handlers are called 5 times per second. 10 open child frame windows lead to 50 calls to all OnUpdateCommandUI(). This uses lots of CPU!!!
 
So I wrote my own IsIdleMessage() to return also FALSE when WM_TIMER messages are handled.
 

I had to ignore most of my registered messages. I have quite a few common controls in the toolbars and updating these is / was quite expensive.
]]> Sun, 14 Jan 2007 03:53:12 +0000 http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19295&title=tabclientwnd-using-lots-of-cpu#19295 <![CDATA[TabClientWnd using lots of CPU : Hi Dan; This virtual function...]]> http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19267&title=tabclientwnd-using-lots-of-cpu#19267 Author: mgampi
Subject: 6090
Posted: 13 January 2007 at 7:21am

Hi Dan;
 
This virtual function determines whether a message in the message queue is a message good for idle processing or not. If this function returns TRUE, the OnIdleUpdate... processing is done (OnUpdateCommandUI() handlers are called).
In the default implementation WM_TIMER messages are defined as 'idle' messages, resulting in OnUpdateCommandUI() calls.
In my application, each mdi child window has started its own timer and the timer interval is about 200ms. This means that after opening one window, the OnUpdateCommandUI() handlers are called 5 times per second. 10 open child frame windows lead to 50 calls to all OnUpdateCommandUI(). This uses lots of CPU!!!
 
So I wrote my own IsIdleMessage() to return also FALSE when WM_TIMER messages are handled.
 
]]> Sat, 13 Jan 2007 07:21:08 +0000 http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19267&title=tabclientwnd-using-lots-of-cpu#19267 <![CDATA[TabClientWnd using lots of CPU : What is this override used for...]]> http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19256&title=tabclientwnd-using-lots-of-cpu#19256 Author: danpetitt
Subject: 6090
Posted: 12 January 2007 at 5:56pm

What is this override used for then and what did you do, just return FALSE?]]> Fri, 12 Jan 2007 17:56:39 +0000 http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19256&title=tabclientwnd-using-lots-of-cpu#19256 <![CDATA[TabClientWnd using lots of CPU : Hi Simon; I agree by 100%....]]> http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19248&title=tabclientwnd-using-lots-of-cpu#19248 Author: mgampi
Subject: 6090
Posted: 12 January 2007 at 1:26pm

Hi Simon;
 
I agree by 100%. In my case I had a MDI application with online trending document types. These documents used timers (WM_TIMER messages) posted by the individual MDI child frame windows to update their contents. These WM_TIMER messages increased the CPU usage due to excessive calls of OnIdleUpdate... .
After overriding the IsIdleMessage the CPU usage went down to 0% from up to 100% when more than 10 to 15 documents were open!
 
]]> Fri, 12 Jan 2007 13:26:24 +0000 http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19248&title=tabclientwnd-using-lots-of-cpu#19248 <![CDATA[TabClientWnd using lots of CPU : Another thing to consider is CWinApp::IsIdleMessage...]]> http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19222&title=tabclientwnd-using-lots-of-cpu#19222 Author: Simon HB9DRV
Subject: 6090
Posted: 12 January 2007 at 3:32am

Another thing to consider is CWinApp::IsIdleMessage - if you override this you can greatly reduce idle processing.
]]> Fri, 12 Jan 2007 03:32:39 +0000 http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19222&title=tabclientwnd-using-lots-of-cpu#19222 <![CDATA[TabClientWnd using lots of CPU : Thank you, I hadnt got around...]]> http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19219&title=tabclientwnd-using-lots-of-cpu#19219 Author: danpetitt
Subject: 6090
Posted: 12 January 2007 at 2:41am

Thank you, I hadnt got around to reversing my change on your code. So glad it was something simple ... thanks!

Wot great support, this could have been a nightmare to resolve if you hadnt remembered about my other change.

Well done Oleg!]]> Fri, 12 Jan 2007 02:41:58 +0000 http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19219&title=tabclientwnd-using-lots-of-cpu#19219 <![CDATA[TabClientWnd using lots of CPU : Hi, in issue https://forum....]]> http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19213&title=tabclientwnd-using-lots-of-cpu#19213 Author: Oleg
Subject: 6090
Posted: 12 January 2007 at 12:47am

Hi,
 
in issue https://forum.codejock.com/forum_posts.asp?TID=6027 you wrote that you added pFoundItem->SetImageIndex( pFoundItem->GetImageIndex() );
It will Recalculate layout each time OnIdleUpdateCmdUI called.
remove it.
 
 
Set breakpoint in CalcWindowRect and be sure it called if client size changed and not all time.
]]> Fri, 12 Jan 2007 00:47:52 +0000 http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19213&title=tabclientwnd-using-lots-of-cpu#19213 <![CDATA[TabClientWnd using lots of CPU : It looks like CXTPTabClientWnd::OnIdleUpdateCmdUI...]]> http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19201&title=tabclientwnd-using-lots-of-cpu#19201 Author: danpetitt
Subject: 6090
Posted: 11 January 2007 at 5:43pm

It looks like CXTPTabClientWnd::OnIdleUpdateCmdUI is calling UpdateContents which is quite a heavy function.]]> Thu, 11 Jan 2007 17:43:42 +0000 http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19201&title=tabclientwnd-using-lots-of-cpu#19201 <![CDATA[TabClientWnd using lots of CPU : I got a few complaints from some...]]> http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19198&title=tabclientwnd-using-lots-of-cpu#19198 Author: danpetitt
Subject: 6090
Posted: 11 January 2007 at 4:56pm

I got a few complaints from some users of my software saying that on their Dual XEON dev machines, my product was using 15-20% of the CPU in total (across 4 processors) when they werent doing anything at all.

This figure went down slightly if they had only 1 doc open but went up significantly with lots of documents.

After some testing, we found that if they turned off the client tabs option so they just had maximised child windows for each document it went down to 0%.

It seems that the MDITabClientWnd is using a lot of CPU, have you noticed anything in this area and/or done any profiling on it?]]> Thu, 11 Jan 2007 16:56:24 +0000 http://forum.codejock.com/forum_posts.asp?TID=6090&PID=19198&title=tabclientwnd-using-lots-of-cpu#19198