On Tue, 2 Oct 2007 16:33:52 -0700 "Hal V. Engel" <[EMAIL PROTECTED]> wrote:
> On Tuesday 02 October 2007 15:33:37 Heiko Schulz wrote: > > Why do you know that it is switching between the > > cores? > > Sounds a little bit like the stutter problem we > > have... > > > > Greetings > > HHS > > I also have an AMD X2 4800+ (which is only slightly faster than > your processor) and I do not see flightgear switching cores while > it is running. I can monitor how the cores are being utilized via > gkrellm2. The Linux process scheduler tends to keep processes > running on the same core to avoid issues with cache coherency and > the like. > > I agree with Heiko that this sounds like the stutter problem. > > I have found that I can make the stutter problem either very bad or > almost unnoticeable depending on how I setup flightgear and my > OpenGL driver settings. You might try the following. > > In FlightGear > > --model-hz=<your monitor refresh rate> > > for LCDs this is typically 60. > > Using either nvidia-settings or nvclock > > Sync to VBlank = true > Allow Flipping = true > Disable cpu optimizations = true > Texture Clamping = true > > setting --model-hz and using Sync to VBlank will synchronize both > the graphics systems and the FDM and Disable cpu optimizations > frees up some cpu resources to help keep the FDM running smoothly. > At least that is my theory for why this seems to, for the most > part, work. With these setting I only see the stutter problem with > doing high speed aerobatics at very low altitudes and even then the > stutters are only for a fraction of a second. > > Hal Wow, what a difference. The stutter is gone, the FLight Sim stays on one core all by itself, and the CPU usage went from 100% during straight and level flight to 26%. That core swapping thing was thowing me, because the problems would start about the same time the core started swapping from one to the other. It was a ruse by the video card all along, trying to throw me off. HAR! Glad I found that program nvclock last night about 1:00 AM.. :) Thanks a ton. Hell maybe even 2 tons. ;) Larry ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Flightgear-users mailing list Flightgear-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-users
