Long load time

[Henke103]

Hi I have a pretty big issue with my new scene, when I press undo or ctrl + z, it takes like a minute to undo.
I have about 2600 geometries in the scene and no lag. I have 8bg ddr3 ram and an intel i7 950 processor so there shouldn't be a problem. Can I fix this? Cause it's really enoying.

[Henke103]

Any ideas?

[TC42]

Welcome to the forums!

With 2600 objects, any physics program will lag. In this case, the long wait is probably because the program probably has to re-load the scene. This would require a lot more power than simply running the sim. If I tried to load a 2600 geom sim on my PC, it might take ~10-15 minutes to load, since my PC has a fraction of the power of yours.

This is my theory about the long load times... you may want to double check with Emil to see if my explanation is correct.

My suggestion would be to reduce the number of stored undos to ~10 (usually all I need) or 20. You can do this by typing app.maxundo=10 into the console (press"~" to bring up console). App.maxundo is simply the number of actions that algodoo stores so that you can undo things. Also, try typing sim.frequency into the console. It should return

Code: Select all

value=100
     default=100

If it doesn't, please say so. Sim.frequency is the number of times that algodoo checks for collisions and performs equations per second. It is measured in Hz. So sim.frequency=100 means that algodoo is performing (in your case) thousands, maybe millions of equations 100 times per second. Increasing sim.frequency results in more lag, but a more accurate sim.

I suggest you check to see if your graphics drivers are up to date. What operating system do you use?

[electronicboy]

i believe he will be using vista or win7
Xp 64bit is fairly uncommon

What GPU have you got? And are the drivers up to date

Also, i would suggest trying to disable the cpus speedstep when using algodoo as it may be putting your cpu on a low frequency.

I feel this may have something to do with it as algodoo only uses one core and may not get the cpu to "step" up.

But it is a large scene and is to be slightly expected, no matter what how great your hardware is.

[Henke103]

I'm running Windows 7 64 bit, and yes my drivers are up to date. I have a Geforce 250 GTS so it's not the best video card and the simulation is running in 100Hz and the max undo didn't help that mutch.

[electronicboy]

Did you try turning off the "speedstep" system on your CPU?

[Henke103]

Don't know what that is

[ImaPirate]

I used to get this issue but I fixed it by setting Threading.numthreads to 6 ( to match my CPU ) and it never did it again.

As for the beta, it's unstable with more than one thread and crashes.