[bug r2795] CPU usage more than 90%

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[bug r2795] CPU usage more than 90%

October 18, 2009, 11:49:36 pm

r2795 GDI, SDL
When I start simutrans, CPU load is always more than 90% and can't play game anymore.

[EDIT]
I tested r2799.
It is not over 90% but still more than 50%. Fast forward and pause are not heavy, but normal state is too heavy for me.
Simutrans 102.2 eats only 10%.

Re: [bug r2795] CPU usage more than 90%

Reply #1 – October 20, 2009, 05:18:02 am

Tested in r2809.

In normal state, it is better, thank you.
But pause mode has big problem. Is is very laggy and dragging window in not possible,

[EDIT]
Tested in r2812.
Pause problem was solved.

But totaly in normal state, it's laggy compared to 102.2.
In large maps, scroll dragging is laggy and if I playing with zoom out map, simutrans don't response for a long time. This problem often happen.
I tested same game with my compiled 102.2, but it doesn't have such a problem.

Re: [bug r2795] CPU usage more than 90%

Reply #2 – October 21, 2009, 03:22:49 pm

Yes , that is known. The older reduces the frame rate faster to keep simulooü counts up (15fps vs. 25fps). I am aware of the problem.

Re: [bug r2795] CPU usage more than 90%

Reply #3 – October 22, 2009, 10:02:24 am

Tested in r2818 and it works well again. Thank you.

Well, some people might feel fps is low in large game, but I think stable simloop and responsive is better than high fps.
So, I like current one.

Re: [bug r2795] CPU usage more than 90%

Reply #4 – November 03, 2009, 04:39:34 pm

r2833 (102.3) has very low CPU usage; the more recently uploaded 102.2.1 series (r2836 and r2839) are back to taking 100% of CPU.

What is different in the 102.3 series that makes it so much more responsive? Will that be rolled back into the next revisions?

Re: [bug r2795] CPU usage more than 90%

Reply #5 – November 03, 2009, 08:09:19 pm

The differences are the speed at which the time between frame is reduced when the game gets unresponsive.

Re: [bug r2795] CPU usage more than 90%

Reply #6 – November 04, 2009, 12:31:27 pm

I don't have 100% CPU usage problem anymore.
When I launch simurans, CPU usage is less than 30%, and no CPU clock up.
Tested both Windows SDL and GDI version.