Multi windows performance drop #48144

New Issue

kevin deguisne · 2016-04-14T10:44:21+02:00

kevin deguisne commented

2016-04-14 10:44:21 +02:00

Navigation in the 3D view is really slow when having multiple windows open, even when there is no 3D inside them
Perhaps there should be an optionnal "turbo mode" to only update inactive windows every X milliseconds, if it's not a bug

win7 x64 gtx 970 / 3 screen
blender 2.77a

Navigation in the 3D view is really slow when having multiple windows open, even when there is no 3D inside them Perhaps there should be an optionnal "turbo mode" to only update inactive windows every X milliseconds, if it's not a bug win7 x64 gtx 970 / 3 screen blender 2.77a

kevin deguisne commented

2016-04-14 10:44:21 +02:00

Changed status to: 'Open'

kevin deguisne commented

2016-04-14 10:44:21 +02:00

Added subscriber: @Iscream3D

NikoLeopold commented

2016-04-15 01:44:31 +02:00

Added subscriber: @NikoLeopold

NikoLeopold commented

2016-04-15 01:44:31 +02:00

What exactly do you mean by multiple windows? How many, at what resolution, what else is running in the background, does it get better if you close some of the windows?
Could you upload a .blend file to reproduce the issue?

What exactly do you mean by multiple windows? How many, at what resolution, what else is running in the background, does it get better if you close some of the windows? Could you upload a .blend file to reproduce the issue?

kevin deguisne commented

2016-04-15 09:13:07 +02:00

I canno't share the scene but this is a screen shot of ma setup, 3 full HD sceen, one vertical, 3 windows, I instantly get almost 60 fps when I close the two side windows, other wise it seems to be lower than 10

I canno't share the scene but this is a screen shot of ma setup, 3 full HD sceen, one vertical, 3 windows, I instantly get almost 60 fps when I close the two side windows, other wise it seems to be lower than 10 ![000243.jpg](https://archive.blender.org/developer/F303863/000243.jpg)

NikoLeopold commented

2016-04-15 10:19:06 +02:00

So basically all i can guess is that it might just be too much to ask from your GPU.
At least it does not appear to be Blender specific.

So basically all i can guess is that it might just be too much to ask from your GPU. At least it does not appear to be Blender specific.

kevin deguisne commented

2016-04-15 14:20:04 +02:00

Well, to me it's a bug ... when I minimize the two side windows, it's still slow and fast if I close them
Also there is no difference in CPU usage

Well, to me it's a bug ... when I minimize the two side windows, it's still slow and fast if I close them Also there is no difference in CPU usage

NikoLeopold commented

2016-04-15 16:03:20 +02:00

Does this only happen with Blender?
I must admit i have no experience with multiple monitors maybe someone might have an idea.

Does this only happen with Blender? I must admit i have no experience with multiple monitors maybe someone might have an idea.

Bastien Montagne commented

2016-04-22 19:52:08 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2016-04-22 19:52:08 +02:00

In any case, we cannot do anything here really, this is specific to your hardware and software setup, plus the scene you are working on! Yes, having three HD OpenGL contexts is much more heavy than one - would not expect a gtx970 to be a limit here, though.

Other points to check/try:

Does it happen with default startup blender (i.e. very light scene)?
Check if the bug is reproducible on another, similar computer (this horribly sounds like over-heating or so).
Give us your exact Blender, OS and GPU (including drivers) versions, as requested in the template!
Ensure both your OS and drivers are fully up-to-date.
Try the latest build from our buildbot.
Try to start Blender in factory settings (--factory-startup commandline option) (this will ensure whether this is a userpref or addon issue or not).
Try to tweak OGL settings in UserPreferences, System tab (window.draw methods, multisampling...).
Try to tweak your GPU driver settings (e.g. try different values between 'performance' and 'quality' if you have such slider, etc.).
Attach as text file here the report generated by Help -> System Info (do not paste it directly in comment).
Try to place this dll next to your blender.exe (software OGL, will be slow, but will show whether this is a driver issue or not).

In any case, we cannot do anything here really, this is specific to your hardware and software setup, plus the scene you are working on! Yes, having three HD OpenGL contexts is much more heavy than one - would not expect a gtx970 to be a limit here, though. Other points to check/try: * Does it happen with default startup blender (i.e. very light scene)? * Check if the bug is reproducible on another, similar computer (this horribly sounds like over-heating or so). * Give us your exact Blender, OS and GPU (including drivers) versions, as requested in the template! * Ensure both your OS and drivers are fully up-to-date. * Try the latest build from [our buildbot](https://builder.blender.org/download). * Try to start Blender in factory settings (`--factory-startup` commandline option) (this will ensure whether this is a userpref or addon issue or not). * Try to tweak OGL settings in UserPreferences, System tab (window.draw methods, multisampling...). * Try to tweak your GPU driver settings (e.g. try different values between 'performance' and 'quality' if you have such slider, etc.). * **Attach as text file** here the report generated by Help -> System Info (**do not** paste it directly in comment). * Try to place [this dll](http://download.blender.org/ftp/sergey/softwaregl/win64/opengl32.dll) next to your blender.exe (software OGL, will be slow, but will show whether this is a driver issue or not).

kevin deguisne commented

2016-04-29 10:35:56 +02:00

I don't think all those point are relevant.

My point is that blender seems to take some time to redraw all windows even when 2 of them are minimized

Other operation can be slow because, moving an object could affect an other object, a drived value in a node graph, change the curves in the graph editor etc...

But navigation only, should not, , it only affect the view where the mouse is. (except when camera is locked)

I don't think all those point are relevant. My point is that blender seems to take some time to redraw all windows even when 2 of them are minimized Other operation can be slow because, moving an object could affect an other object, a drived value in a node graph, change the curves in the graph editor etc... But navigation only, should not, , it only affect the view where the mouse is. (except when camera is locked)

Bastien Montagne commented

2016-04-29 11:57:49 +02:00

Changed status from 'Open' to: 'Archived'

Bastien Montagne closed this issue

2016-04-29 11:57:49 +02:00

Bastien Montagne self-assigned this 2016-04-29 11:57:49 +02:00

Bastien Montagne commented

2016-04-29 11:57:49 +02:00

I don't think all those point are relevant.

Seriously… You know Blender codebase that well?

Anyway, no point in keeping this open, if you do not want to do your share of the work. Tracking bug, especially that kind of config-specific ones (if multi-monitor/blender window was generally that slow, think we would have known since ages already, you are not the only user with three screens around), requires full cooperation from reporter, we cannot do anything otherwise (it’s hard enough to handle already).

> I don't think all those point are relevant. Seriously… You know Blender codebase that well? Anyway, no point in keeping this open, if you do not want to do your share of the work. Tracking bug, especially that kind of config-specific ones (if multi-monitor/blender window was generally that slow, think we would have known since ages already, you are not the only user with three screens around), requires full cooperation from reporter, we cannot do anything otherwise (it’s hard enough to handle already).

kevin deguisne commented

2016-05-02 18:28:07 +02:00

sorry... I was wrong, removing all my ad-don solved the "bug", I still have to find wich one.

Thank you

sorry... I was wrong, removing all my ad-don solved the "bug", I still have to find wich one. Thank you

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Multi windows performance drop #48144