For those on a quest for low-latency:

Configure and optimize you computer for Audio.
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By the way, I just got off of GamePreLauncher's forum, and I think there is still an argument to dual-boot (in some situations).

My laptop is dual purpose. It is my main on-the-go device, and as such, it uses the internet, has an antivirus program, etc.

In my current setup, I have a parallel installation of two Win XP OSes (One for my regular use, and one for my audio use). The one for my audio use has all internet stuff disabled/turned off, and has no antivirus program installed. The one for regular use has all of these things on and running.

According to my research, some antivirus programs that use low level drivers are not able to be disabled by GamePreLauncher, and can only be disabled if the antivirus software itself has a a way to turn itself off temporarily (ie turning off the Self Defense mode). See copy of note below:

"This is normal situation if any antivirus installed.
Some antivirus services or firewalls can not be disabled by conventional methods, even manually, since their services are controlled by low-level drivers from the antivirus developers. So antivirus works in a game mode.
If you want to disable it (in a game mode only) , you can try to turn off self-defense function (but not all antivirus programs have this feature - some of them you could not stop until uninstall), and then GP can turn off antivirus service in the game mode and restore it back in user mode.

* If you turn off your antivirus program and network is enabled in GP - do not open internet browser (or use only trusted sites) and do not use somebody else's flash sticks in game mode."

In my case, I think I would benefit the most from having one of my installations not have any antivirus software installed (my audio OS). Then, using GamePreLauncher, I could get the maximum benefit.

In this way, I have a full-use regular OS, and a hyper-tuned audio OS, all on the same computer.

I'm going to have to download this program and check it out. My computer is old and I don't have money to buy a new one, so I'll need to squeeze every last drop of RAM and CPU out of my system for audio use. :-)

--Sean

Note: Edited for spelling and clarity corrections. :-)

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Along the theoretical physics, can you guys post us your exact results as benchmarks? Thanks!

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When I restart in game mode my DPC latency is all over the place vs when I load up windows in it's normal config on Win 7 x64. No idea why, it is fine under the normal config.

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davidka wrote:Along the theoretical physics, can you guys post us your exact results as benchmarks? Thanks!
I haven't actually tried it yet. It's still in that theoretical stage for me. ;-)

--Sean

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monkeymanx wrote:When I restart in game mode my DPC latency is all over the place vs when I load up windows in it's normal config on Win 7 x64. No idea why, it is fine under the normal config.
Interesting. I'd be interested in learning why. What tool are you using to measure your DPC? Is it freely available?

--Sean

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audiojunkie wrote:
monkeymanx wrote:When I restart in game mode my DPC latency is all over the place vs when I load up windows in it's normal config on Win 7 x64. No idea why, it is fine under the normal config.
Interesting. I'd be interested in learning why. What tool are you using to measure your DPC? Is it freely available?

--Sean
Just search for "DPC Latency Checker". That is the program, I have version 1.3.0. I have no idea why it is worse in the "game" mode but it just is.

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Monkeymanx,
(a) do you have a virus scanner installed?
(b) did you reboot before doing the "before" DPC check as well as before doing the "game" DPC check?
(c) did you disable networking, explorer & wifi for your DPCcheck profile in gameprelauncher?
(d) did you wait for a couple of minutes after you rebooted before doing the DPC checks?

If any of the above, you might want to (a) uninstall the virus scanner (as it may be doing updates/scans on the reboot) (b) reboot for both (c) disable those and (d) wait a few minutes.

Otherwise I'm stumped.

On my machine (xp sp3 nlite'd 32bit, no wifi, HEAVILY optimised) dpc latency went from 4 av 9 max to 2.5av 6max in "game" mode.

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@ MonkeyManx: Please let us know what you find after trying these things. I'm very curious why you would have more problems, rather than less problems from this optimization.

--Sean

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metamorphosis wrote:Monkeymanx,
(a) do you have a virus scanner installed?
(b) did you reboot before doing the "before" DPC check as well as before doing the "game" DPC check?
(c) did you disable networking, explorer & wifi for your DPCcheck profile in gameprelauncher?
(d) did you wait for a couple of minutes after you rebooted before doing the DPC checks?

If any of the above, you might want to (a) uninstall the virus scanner (as it may be doing updates/scans on the reboot) (b) reboot for both (c) disable those and (d) wait a few minutes.

Otherwise I'm stumped.

On my machine (xp sp3 nlite'd 32bit, no wifi, HEAVILY optimised) dpc latency went from 4 av 9 max to 2.5av 6max in "game" mode.
I have MSE for a virus scanner. That shouldn't matter though as it doesn't get started in game mode.

I'm not sure what you mean in your question b. When I boot regular my DPC is low, when I boot using the gameprelauncher it is all over the place. Only 22 services are running at that point. Maybe something that controls latency doesn't get started in Win 7 x64.

No wifi. I have all my stuff enabled in my regular start up and latency is fine.

And yes to d.

Honestly, I really don't need optimization it would seem as with standard win 7 everything is fine. I do have an i7 2600 @ 4.5ghz though and 16GB Ram.

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audiojunkie wrote:@ MonkeyManx: Please let us know what you find after trying these things. I'm very curious why you would have more problems, rather than less problems from this optimization.

--Sean
I'm thinking that a service that is needed in Win 7 x64 as far as scheduling doesn't get started or something like that.

I already uninstalled the gameprelauncher as I don't really need it.

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monkeymanx wrote:
metamorphosis wrote:Monkeymanx,
(a) do you have a virus scanner installed?
(b) did you reboot before doing the "before" DPC check as well as before doing the "game" DPC check?
(c) did you disable networking, explorer & wifi for your DPCcheck profile in gameprelauncher?
(d) did you wait for a couple of minutes after you rebooted before doing the DPC checks?

If any of the above, you might want to (a) uninstall the virus scanner (as it may be doing updates/scans on the reboot) (b) reboot for both (c) disable those and (d) wait a few minutes.

Otherwise I'm stumped.

On my machine (xp sp3 nlite'd 32bit, no wifi, HEAVILY optimised) dpc latency went from 4 av 9 max to 2.5av 6max in "game" mode.
I have MSE for a virus scanner. That shouldn't matter though as it doesn't get started in game mode.

I'm not sure what you mean in your question b. When I boot regular my DPC is low, when I boot using the gameprelauncher it is all over the place. Only 22 services are running at that point. Maybe something that controls latency doesn't get started in Win 7 x64.

No wifi. I have all my stuff enabled in my regular start up and latency is fine.

And yes to d.

Honestly, I really don't need optimization it would seem as with standard win 7 everything is fine. I do have an i7 2600 @ 4.5ghz though and 16GB Ram.
You've missed the point.
If you don't reboot for both, you're not getting an accurate reading.
In the first 5 minutes of booting up, windows does a lot of housekeeping, loading services, establishing the network etc. Also, virus scanners often do housekeeping such as autoupdating and memory scanning, and as mentioned, many of them don't get blocked by gameprelauncher as they run at a kernel level.
So no, you don't have an accurate reading.

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metamorphosis wrote:
monkeymanx wrote:
metamorphosis wrote:Monkeymanx,
(a) do you have a virus scanner installed?
(b) did you reboot before doing the "before" DPC check as well as before doing the "game" DPC check?
(c) did you disable networking, explorer & wifi for your DPCcheck profile in gameprelauncher?
(d) did you wait for a couple of minutes after you rebooted before doing the DPC checks?

If any of the above, you might want to (a) uninstall the virus scanner (as it may be doing updates/scans on the reboot) (b) reboot for both (c) disable those and (d) wait a few minutes.

Otherwise I'm stumped.

On my machine (xp sp3 nlite'd 32bit, no wifi, HEAVILY optimised) dpc latency went from 4 av 9 max to 2.5av 6max in "game" mode.
I have MSE for a virus scanner. That shouldn't matter though as it doesn't get started in game mode.

I'm not sure what you mean in your question b. When I boot regular my DPC is low, when I boot using the gameprelauncher it is all over the place. Only 22 services are running at that point. Maybe something that controls latency doesn't get started in Win 7 x64.

No wifi. I have all my stuff enabled in my regular start up and latency is fine.

And yes to d.

Honestly, I really don't need optimization it would seem as with standard win 7 everything is fine. I do have an i7 2600 @ 4.5ghz though and 16GB Ram.
You've missed the point.
If you don't reboot for both, you're not getting an accurate reading.
In the first 5 minutes of booting up, windows does a lot of housekeeping, loading services, establishing the network etc. Also, virus scanners often do housekeeping such as autoupdating and memory scanning, and as mentioned, many of them don't get blocked by gameprelauncher as they run at a kernel level.
So no, you don't have an accurate reading.
Well, I let it sit for awhile so I think I do have an accurate reading. Could it just be that this thing sucks for audio under win 7 x64?

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Again... If you didn't reboot for the non-"game" test, or disable explorer, networking and wifi for the "game" test, you didn't get an accurate reading - bye.

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metamorphosis wrote:Again... If you didn't reboot for the non-"game" test, or disable explorer, networking and wifi for the "game" test, you didn't get an accurate reading - bye.
It did reboot in that mode is what I'm saying. Obviously, it looked like a crappy terminal. So yes, I did. You are using XP 32 bit which is a different animal. It may work for you, great, I'm not sure why it is sucking in 7.

Why would I lie about this or report something that is incorrect? I have nothing to gain or lose. By all means, somebody else with Win 7 x64, give it a try and see what you get. It doesn't matter what you got in XP because that is not what I'm using. Again, completely different animal. Your OS is almost a decade old, it is going to be different than Win 7.

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This worked great for me(pregamelauncher). Does anyone else who use it have a bit of trouble once you switch from pregame launcher back to normal mode again? My computer has some trouble starting back up. Then again, my computer is nothing more than garbage.

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