Using SetCPU or GEM Settings

[wingdo]

SetCPU and the Gem settings do the same thing essentially, setcpu just gives you the option of having profiles. SetCPU will override Gem so there is no harm either way whether you turn it off in gem or not.

SetCPU also gives you the opportunity to overwrite the default "advanced" settings. These are the settings which determine how often the CPU is polled and at what load level the speeds will ramp up. Some kernels vary wildly in those numbers. Just in cvpcs's kernels I've seen some "on demands" revert to a 50% load before ramping up to a higher speed, and other on demands are set to 93%.

[dfabbeb]

If the LV is stable then use that - the only difference is that some processors can get away with reduced voltage and some cannot. If there are no stability issues then it will perform exactly the same, with the exception of reduced heat and increased battery life for the low voltage kernel.

That's the general jist, but not 100% accurate. You can also get into an "error correction" state due to too little voltage where the phone may heat up and/or have some lag, but is otherwise "stable" in terms of whether or not apps crash/FC.

That makes sense. Is there any way of determining that this is happening, though? Any particular stress test that would show it?

[vmspionage]

That makes sense. Is there any way of determining that this is happening, though? Any particular stress test that would show it?

SetCPU stress test will report errors

[SDraconis]

From the SkullOne's Overclocking 101 thread:

If the kernel has a voltage in one or more of the seven slots that is too low for your phone, you will get overheating from the OMAP3430's ECC module kicking in to fix data read/write errors.

Do we currently have a good way to determine if/when this is occurring, or is it just watching for high temps and lag together at unexpected times?

I, at present, have found no way to monitor the ECC kicking in. So lag and heat are currently our only signs.

[dberezin]

I switched back to the SV 250-800 (from the LV 250-800) after I started this thread. My personal, non-scientific observations has shown that my Droid seems to run cooler and be a little "snappier". I just unplugged from my wall charger this morning and SetCPU shows my battery at 73.4 degrees and OMAP3 Temp at 68 degrees.

My temperatures tend to stay down with the SV kernel.

I also begrudgingly switched from Launcher Pro Plus (I paid for the app) to ADW Launcher. For some reason, I was getting a LOT of home screen redraws and with ADW with System Persistent selected, this is not happening. But that's a topic for another thread...

[jrredho]

Hey All,

I'm almost totally ignorant on all things Droid, and I really hate it that I'm reviving an old topic, but here goes: I rooted my OG Droid several months ago with the sole purpose of overclocking it. I first flashed SPrecovery, then went the path of a installing couple of update.zip files, first for root, I believe, then an overclocked kernel. Finally, I installed and set up setcpu along with some profiles.

Eventually, I got the notion to get a bit more adventurous and just installed Sapphire 2.0.2 and worked my way up to installing the 125-1000MHz/7 slot/IV kernel. Naturally, I used Titanium Backup, so I re-installed setcpu with my same setcpu profile set. I also set the Gem Settings options for overclocking to on.

Okay, now for my question....

SetCPU and the Gem settings do the same thing essentially, setcpu just gives you the option of having profiles. SetCPU will override Gem so there is no harm either way whether you turn it off in gem or not.

...my very basic understanding is that this is now incorrect. I had my Droid plugged in to AC, and verified that it was charging and was at 80%. The only profile that should have been active among my list was the "Charging/AC" that I had set to be 125/400MHz. But, upon looking at the setcpu info page, the device was operating at 550MHz.

Do the setcpu profiles no longer supercede the Gem overclocking settings?

many thanks!

john