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[KERNEL][CM7][Froyo] Dalingrin's OC kernel w/fixed IO perf (quadrant) & 1.2Ghz test

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By Divine_Madcat, Forum Moderator on 25th March 2011, 06:02 AM
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Disclaimer: As always, flash at your own risk.

So, recently there has been alot of debate over why quadrant (and to some extent, system performance) was lower with the OC kernel, as compared to the stock CM7 kernel. ( As part of my examining the problem, i went looking for a solution. Starting from the first OC CM7 kernel, i would run quadrant and see how the performance fared. I finally found the issue appeared in the 3-08a kernel; using that, i rolled back changes until i found the commit remove to fix the issue. Specifically, it seems to be somewhere in the update:

In short, using his source, i have compiled a kernel with fixed I/O performance, and all his other tweaks (interactive gov, etc).

So, I want to make this clear; this is still dalingrin's kernel; in no way do i wish to take credit for his work. But, while he is out, work must go on, right?

Who is this kernel for?
eMMC Froyo and CM7 users

Will this work on SD cards?
It may if you manually replace you uImage, but i cannot guarantee it (since i cannot test it)

Is everything working in this release?
everything like bluetooth and dsp should still be just fine (you may have to do a few hard shutdowns/reboots to kick on BT, like normal).

Kernel Links -3/25/10
OC kernels (up to 1100Mhz, Interactive gov, BT and DSP):

Extra network features (PPP, etc)

OC kernel (up to 1190Mhz, Interactive gov, BT and DSP):
[b] For those having problems setting this speed in the CM7 performance settings, give setCPU a try, but don't use profiles. Using set CPU, i am able to get my system stable at 1190, where the CM7 manager instantly locks up.

After flashing, please make note of OVERALL system response. The dip in quadrant scores prompted the fix, but i feel that the system is overall better; I would like some more input if others are seeing this as well.

Any and all feedback is welcome, and I will do what i can for support...
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25th March 2011, 06:42 AM |#2  
Nburnes's Avatar
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Great job man, you and dalingrin both!

Ran 3 quadrant tests on newest nightly (#30)
1. 1856
2. 1700 even
3. Whopping 2030!
25th March 2011, 07:30 AM |#3  
ADude's Avatar
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Can you be more specific about which network features are in the second choice ?

Thanks !!
25th March 2011, 08:00 AM |#4  
Divine_Madcat's Avatar
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Originally Posted by ADude

Can you be more specific about which network features are in the second choice ?

Thanks !!

Um....truth is, i am really not too familiar with it, but looking a the diff between the two configs:

# Core Netfilter Configuration
# IP: Netfilter Configuration

I am trying out the net kernel again, to see if it is better than the last time i tried it..
Edit: Its looking better than the last time i tried it. Launcher pro hangs for a but on startup, but so far so good after that.
25th March 2011, 09:15 AM |#5  
360Razir's Avatar
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Just started using CM7 last night (w/bottom keys mod, so the nightly is from a few revisions back), but just installed this kernel (the regular version, w/out the Net adds, which I don't need), wiped cache & Dalvik, rebooted, set OC to 1100 and "performance" in CyangenMod Settings and now getting 1918 Quad score...vs. 1372 on the stock kernel with no OC.

I can definitely live with that score...great work to you and dalingrin!!
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25th March 2011, 09:34 AM |#6  
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Thanks for taking care of this while I am gone. Much appreciated.
The update to *.6 is not necessary anyway.
When I get back I will revert the *.6 update and compile some of the netfilter/iptables and tun as modules as this seems to be more compatible than compiling them directly into the kernel.
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25th March 2011, 09:59 AM |#7  
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Madcat, kudos to you. This is perceptibly faster.
25th March 2011, 12:17 PM |#8  
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great work!
25th March 2011, 12:23 PM |#9  
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so is this a kernel then?
25th March 2011, 12:24 PM |#10  
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WOW, scrolling through XDA forum is much smoother than it used to be.
25th March 2011, 01:01 PM |#11  
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Tried on SDcard, installed by copying uImage to Boot. Reboots to EMMC when trying to load desktop. Back to CM7 stock. I guess I'll wait. Thanks though!

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