I wanted to chime in on this. It is possible that hyper threading is making a difference because it does require support at the OS level. (If I am not mistaken). Given that, it is possible that something within the OS (including such things as graphics drivers) might not be handling hyper threading properly.
I believe it is unlikely that java has anything to do with these issues, since hyper threading should be transparent to the application (and java is itself just an application). Cheers, ian On Wed, 30 Jun 2004, Justin Couch wrote: > Hong Cao wrote: > > > We have multiple machines in Windows XP that has intel P4 2.8G Hz+ CPU with > > Hyper Threading enabled. We found Java 3D picking action become very slow, > > even slower than machines with less than 1G Hz CPU. The > > pickCanvas.pickAllSorted() method is taking more than 10 times its original > > time. > > This has the appearances of a driver or O/S problem to me. I run a > dual-CPU development machine and don't see any slowdown in picking code. > Since hyperthreading is, theoretically, supposed to present 2 logical > CPUs to application code, it should seem somewhat the same as a real > dual CPU machine. > > -- > Justin Couch http://www.vlc.com.au/~justin/ > Java Architect & Bit Twiddler http://www.yumetech.com/ > Author, Java 3D FAQ Maintainer http://www.j3d.org/ > ------------------------------------------------------------------- > "Look through the lens, and the light breaks down into many lights. > Turn it or move it, and a new set of arrangements appears... is it > a single light or many lights, lights that one must know how to > distinguish, recognise and appreciate? Is it one light with many > frames or one frame for many lights?" -Subcomandante Marcos > ------------------------------------------------------------------- > > =========================================================================== > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message "signoff JAVA3D-INTEREST". For general help, send email to > [EMAIL PROTECTED] and include in the body of the message "help". > > =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
