100% Physics Load -> 'Out of Real Time'

With any car on any track I have a major problem that seems to be caused by physics processing.

After one or two laps (race or solo) the game goes 'out of realtime': FPS is OK (50-100 on moderate setting) but the car seems to be jerky and in slow motion. AI cars also start to have stuttered motion. Once this happens the only fix is to exit and reload the track.

I watched the CPU load (CTRL/C) and the purple bar (Physics) is generally about 80%, but if it hits 100% it remains stuck at 100% and the game is unplayable. Restarting the race does not help, I need to reload.

Any help would be appreciated! I'm using a laptop which is a bit below required CPU spec, but frame rate is not a problem, so I hope this can be fixed or worked around. (I see one or two other posts here with similar issues):

...Alienware M11xR2, i7 @ 1.2GHz & 8GB RAM
...GeForce GT 335M 1GB RAM
...Win 7 64bit

 

I have noticed the same thing....8 (4+4) cores at 100%! Before the update only a small fraction where used.

Running 2600K@4.3GHz

 

Seems to be my own fault...
A bug in my newly created plugin....without the plugin, everything is working fine.

 

I'm overclocking it to 2.27GHz, but yeah, that's what I meant by " below required CPU spec"

 

i7s don't come as low as 1,2 GHz, they always have more than 2 GHz clock frequency

 

It's one year old, and designated 'i7 @ 1.2GHz'. Of course with the Intel 'turbo' think it runs at about 2GHz for games. I increased the FSB to get 2.27 GHz View attachment 1319

 

I had the same problems. My Q6600 ran at 2,4 GHz and the cores quickly became too hot when on track (even without AI cars), so I installed a better cooler and overclocked it to 2,7 GHz. Never had those problems again since then.

 

OK, seems I should give up running this on my laptop as the cores are getting pretty hot.

 

Fixed. This may be of use to others using laptops....
Heat was not exactly the problem; with i7 laptops the TDP (Thermal Design Power) setting is really low to maintain battery life. My laptop was hitting TDP of 10W after which 'turbo boost' is throttled back (CPU drops below 2Ghz) for a while.
Using Throttlestop to push TDP up to 30W got rid of all my slow-down issues