Fps counters pipeline. (when they measure)

[1988fido]

Hi

 

what is the best FPS counter or lets say  bare metal , without overheads or as early as possible in the pipeline.

Short version:

1. I want to know where does msi afterburner/rivatuner measure the fps at what time in the pipeline.
2. when does the Fraps measure it.
3. when does in-game engine measure it
4. when does the display OSD measure it (like that asus image)
5. Nvidia frame View  T_Present is at api ?

Long version:

I got this picture from the net so i can understand how the order of things work : 

so it is like

1. Game Engine

2. Api (DX12, open GL, vulkan) all the same position right?

3. Gpu Drivers

4. Render completed sent to Display

5.  **Displayed frame** 
(display finished processing etc.. and all the input lag bla bla so the frame is displayed )

something like that right?

.
.

A-
So I heard that Fraps measure fps or show the fps on driver level
( dont know where i got that info from, something like after drivers finish)
But I dont think it is true , is it?

Anyway i heard it doesn't work with dx12 stuff.
so not a great choice for me.

B-
then the most common I see these days is
 **Msi afterburner + Riva tuner** combo.
so where does that sit in the pipeline ? is it after rendering complete before display ?

C-
Nvidia frame viewer
This picture confuses me it measures it 3 times 
So first one ( T_Present) it is on api level ?
2nd time (T_Render) it is after Rendering complete so maybe same as [msi + riva] ?

D-
the in-game Fps counters work as built in the game game engine so maybe they are the earliest ? but maybe not always because some will have it work differently , will depends on the game engine right?

3rd time it is (T_Display) Same as displays built in overlay FPS counters?

 

sry for the bad English.

 

[Mephi00]

I guess to get the most exact reading you should go with the osd reading, because that shows you how many fps you have while using the screen...

[1988fido]

28 minutes ago, Mephi00 said:

I guess to get the most exact reading you should go with the osd reading, because that shows you how many fps you have while using the screen...

make sense but I still want to know where the others measure it

[Mephi00]

4 minutes ago, 1988fido said:

make sense but I still want to know where the others measure it

I guess you'll need to find an actual engeneer/programmer who is familiar with how the drivers and fps counters work. That's not a lot of people and I think the awnser is wayy more complicated that you might expect.