M17x DPC Latency

[granyte]

You also have to wonder what the hell they were thinking since this is not a new problem for them. It was in the M17 as well as various other past models (maybe it is actually a Flextronics problem as they would be the ones that actually make the BIOS)

the m17 was even worst it didnot even figured when it was going over it's own limitation and ran overthem not caring causing the stutering story we saw

and yes the q9000 can go far down i could run mine down to 1.00v

[Mitchell2.24v]

Actually, what I saw was just having TS open and running in monitor only mode produces latency spikes. Setting it to 12.5% is supposed to force modulation as I understand it - doing so will produce higher spikes and level out.

On my R2 having TS open will not cause more spikes than without TS. I am also unable to confirm the spikes when enabling 12.5% in TS.

[scook9]

I think the monitoring itself is what is triggering the spikes. My desktop does that too whenever AI Suite is open (the asus motherboard software). Setting to 12.5% does not trigger the modulation, it is the result. High laptop power draw is what triggers it. The changes from 100% down to 12.5% are when the DPC spikes occur.

[BatBoy]

On my R2 having TS open will not cause more spikes than without TS. I am also unable to confirm the spikes when enabling 12.5% in TS.

If you have an R2 this is a non-issue. Don't worry about it.

[unclewebb]

Here's how things look on a Dell Core 2 Duo T8100 without ThrottleStop running.




Here's how things look with ThrottleStop running and Clock Modulation at 100%. No significant difference.




And here's what happens to DPC Latency when Clock Modulation drops down to 12.5%




On this CPU, there is a direct connection between the two so if a CPU is being throttled with clock modulation then that can lead to increased DPC Latency and will show much larger spikes up into the red zone. If you have DPC Latency issues to begin with, my thought was that if you had clock modulation issues as well, this could make the DPC issues a lot worse like I was seeing. Maybe this doesn't apply to quad core processors but I think it does.

[Alek123]

Alek, which Wireless driver do you have installed? Be sure you have the dell wireless driver installed and not the Win7 native wireless adapter driver. The Win7 wireless will produce latency spikes.

I am using the latest broadcom driver from Dell Support.

[Blue_Wolf]

Hi guys, I hope someone can help with with a latency issue I'm currently getting:

So I booted my machine up today and noticed it was acting kind of laggy. I ran latency checker and sat and watched it do this:

http://img.photobucket.com/albums/v2.../latency-3.jpg

This issue comes up on my laptop occasionally but it's never triggered so many red spikes before. Usually a reboot fixes it but that's hardly a solution.

I then went into device manager and disabled my GPU's, wireless etc etc the usual suspects but nothing changed. I'm using the P06 Dell GPU drivers and they've run great for me so I doubt it's them. I also have the Dell wireless drivers and no sign of CPU throttling.

Then I noticed this:

http://img.photobucket.com/albums/v2...controller.jpg

My system is set up with Raid 0, and I'm wondering if the Nvidia RAID software is interfering with the microsoft one.
Is the Nvidia one safe to remove? is it even safe to temp disable it to see if the spikes go away? I don't want to mess up my hard drive.


Right now the red spikes aren't appearing but I get the ocassional yellow one, the green ones are the same but my laptop feels like it's doing a million and one tasks because it's so slow. I don't understand why this only happens sometimes...

Thanks for any help.

[cameronmc88]

I'm using the g60JX-rbbx05 laptop and I also have bad DPC latency.. do you know if the i5-430m CPU throttles much? I have the power settings on high performance.