Vsync without triple buffering and fps

[SteveW 1,792]

 

1 hour ago, mikeymike said:

I set my monitor 4K to 25hz

p3d vsync on tripple buffer on and unlimited FPS

its at 25 FPS in sim

 

Hi, That's right. As I said VSync=On in P3D makes the sim aim for 25 - your monitor refresh frequency.

[mikeymike 357]

2 hours ago, SteveW said:

 

Hi, That's right. As I said VSync=On in P3D makes the sim aim for 25 - your monitor refresh frequency.

Yes,

but why is it not aiming for 25 when disabling it via ncp?

they both need to be set?

im confused 

Edited October 10, 2018 by mikeymike

[SteveW 1,792]

Because it's not got the 25 to refer to.

[mikeymike 357]

1 hour ago, SteveW said:

Because it's not got the 25 to refer to.

I see.. 

thank you.

 

[Dirk98 354]

On 4/18/2018 at 10:28 AM, SteveW said:

Adding the Triple Buffer does not alter the fps it only enables the next frame drawn to be more accurate according to what the scene will be when it is finally displayed.

What is "the next frame drawn to be more accurate according to what the scene will be when it is finally displayed"? More accurate in what sense? Does it require any noticeable cpu overhead?

Thanks.

 

[GSalden 4,655]

5 minutes ago, Dirk98 said:

What is "the next frame drawn to be more accurate according to what the scene will be when it is finally displayed"? More accurate in what sense? Does it require any noticeable cpu overhead?

Thanks.

 

It adds a little more smootness at the cost of a little framerate.

But If you system cannot run the Vsync framerate it will cause extra jittering.

[Dirk98 354]

2 minutes ago, GSalden said:

It adds a little more smootness at the cost of a little framerate.

But If you system cannot run the Vsync framerate it will cause extra jittering.

Indeed, on AS EGLL approach (with ORBX FT England), FPS always sink somewhat below 25 FPS (mon. refresh set @25Hz), so I may see some extra jitters due to tripple buffering?

Thanks. 

[SteveW 1,792]

2 hours ago, Dirk98 said:

What is "the next frame drawn to be more accurate according to what the scene will be when it is finally displayed"? More accurate in what sense? Does it require any noticeable cpu overhead?

Thanks.

 

Yes since with TB there's more often a free buffer ready to update, less pauses, and there's less deferring of your inputs, sometimes known as antilag.

[Wanthuyr Filho 83]

On 10/10/2018 at 1:32 PM, B777ER said:

Problem with this is the autogen issue on arrival. I used to have this setup but now set 30fps (29 actually based on @SteveW findings) internally to allow the autogen to load properly at arrival. Still smooth as well. 

True, I also noticed that reducing the internal FPS lock setting to 40 would eliminate the autogen loading issues (but keeping the NVI set to 30 still). Now the CPU usage is much higher, yet with some headroom for most of the time.

[gianluk81 3]

I guys...i have this issue after numerous test with p3d v4.3.

Have a monitor with 30hz or 60hz possibility and use a gtx 1080 gpu on 7700k@5.0ghz with 16 ram on win10 x64 pro.

30hz+lock in sim at 30+tb on and vsync on in sim (no tweak on inspector), and use FFTF at 0.01=FPS stable at 30fps, autogen and ground textures load very very well also with 320fslabs (very impact on performance) but, have a constant microstutter. Same situation, only change fps lock from 30 to 31...sim ultra smooth, but lost autogen during flight. Why this? Have a same problems if set 60hz with 1/2vsync and 30 or 31fps lock...if 30 autogen ok, but costant microstutter, with 31 smooth but lost autogen. Please help!

[SteveW 1,792]

Leave out the low FFTF setting since you want a higher FFTF at some stages. Keeping a low FFTF constantly means something's going to be catching up at some stage and maybe in small chunks.

[joepoway 241]

On 10/10/2018 at 9:37 AM, mikeymike said:

Hi Steve 

thanks for the reply,

i am a little confused , lol I’m. Not sharpest tool in the shed.

when I set my monitor 4K to 25hz and the vertical sync is on in ncp

p3d vsync on tripple buffer on and unlimited FPS

its at 25 FPS in sim

when I switch off vertical sync in 

ncp and with same setting in P3d 

my frames are way up to 50

shouldnt P3d vsync work 

sorry if it is a stupid question 

 

regards

mike

 

 

On 10/10/2018 at 2:18 PM, SteveW said:

Because it's not got the 25 to refer to.

Steve

I thought his sim should still be attempting to average around 25 fps since he has Vsync still enabled in P3D using a 25Hz monitor setting, why would it climb to 50 fps?

I don't use NCP to enable Vsync, only P3D and my monitor is 30 Hz and my frames bounce around 30 fps.

What am I missing regarding Vsync?

Thanks in advance

Joe

[SteveW 1,792]

Hi Joe, What's happening is that the 25 doesn't get recognised so the same as if VSync=Off in P3D Display Settings. Apologies if i'm not interpreting you right.

[SteveW 1,792]

1 hour ago, joepoway said:

 

I don't use NCP to enable Vsync, only P3D and my monitor is 30 Hz and my frames bounce around 30 fps.

What am I missing regarding Vsync?

Certainly you have it sorted out there OK. That's precisely what it is designed to do. You effectively limit the fps down to the monitor refresh frequency. However you notice I always say 'steer' the fps output and so it's not actually a limit and you see the fps wobble around the monitor frequency.

[joepoway 241]

8 minutes ago, SteveW said:

Hi Joe, What's happening is that the 25 doesn't get recognised so the same as if VSync=Off in P3D Display Settings. Apologies if i'm not interpreting you right.

Hi Steve

I'm still confused as to why Mike's system ran up to 50 fps when he had Vsync enabled in P3D with a 25Hz monitor setting, can it actually bounce that high?

Also if NCP was set to Vsync On would it clip at 30 FPS instead of bouncing higher?

Joe

Edited November 25, 2018 by joepoway