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

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camwinnn

Senior Member
Jul 23, 2009
131
22
EDIT: So, this is really wierd. Using the CM settings, 1190Mhz instantly locks my system up. HOWEVER, if i use SetCPU, it runs just fine, and makes several complete benches at 1190...... I can't explain this one, but it is something to try (and i will update the first post with this).

What nightly? Been using your 1.2ghz kernel for about a day only using the cm performance settings an haven't had a problem yet.

Thank you btw ;P

Sent from my NookColor using Tapatalk
 

l0m31n

Member
Aug 8, 2009
31
3
using nightly 31.

1190mhz doesnt run for me in either setcpu or cyanogensettings.

locks up and reboots with cyanogensettings. hangs with setcpu.

1100mhz is stable.
 

newellj79

Senior Member
Jan 2, 2011
2,370
296
1190 not working for me with setcpu or cyanogenmod settings either. 1100 froze up twice on me last night. Never had this problem with the 3/16 kernel. Went back to 3/16 for awhile. Flashing 3/25 again now to test. As I stated a few posts back, for sure there is a volume increase with 3/25 so I really want it to work!
 

JeremyNT

Senior Member
Jul 22, 2010
383
25
using nightly 31.

1190mhz doesnt run for me in either setcpu or cyanogensettings.

locks up and reboots with cyanogensettings. hangs with setcpu.

1100mhz is stable.

Same here. I guess 1.1 ghz is the max for most devices, only a lucky few can hang at 1.2.

Sent from my NookColor using Tapatalk
 

FL5

Senior Member
Nov 28, 2009
306
17
Dallas, TX
Just wanted to pop in and say that 1190mhz works incredibly well with mine. Even if it doesn't work for some, it is greatly appreciated by those of us that it does work for.

BTW, 2146 in quadrant. =P
 

ADude

Senior Member
Mar 5, 2011
528
59
Same here. I guess 1.1 ghz is the max for most devices, only a lucky few can hang at 1.2.
To clarify for those not familiar with wafer fab:

The chip company is delivering CPUs to B&N to run at 800.

So, the wafers are only tested for that speed, but often the exact same wafers are used for higher speed CPUs, with the only difference being how well the fabrication came out.

There can also be variations from chip to chip on a wafer, and certainly there are variations amongst the various chips provided to B&N.

So, some CPUs may run fine at 1.2ghz, and others struggle to run at 1000.

This is obviously clear to most posters, but might not be to a few reading this.
 

poofyhairguy

Senior Member
Feb 19, 2011
501
101
Seems like though everyone can run 1.1GHz fine. That means there is still room to move for most. Honestly from most issues it just seems like at 1.2GHz we need a little more juice...
 

Divine_Madcat

Retired Forum Moderator
Sep 9, 2005
2,940
2,613
USA
Seems like though everyone can run 1.1GHz fine. That means there is still room to move for most. Honestly from most issues it just seems like at 1.2GHz we need a little more juice...

I agree, more juice might help, but i am very learn of doing that; i really dont know how much is too much for these devices.....
 

camwinnn

Senior Member
Jul 23, 2009
131
22
What nightly? Been using your 1.2ghz kernel for about a day only using the cm performance settings an haven't had a problem yet.

Damn can't say that now, froze up on me last night a couple times, gonna use setcpu to see if that will help.

Sent from my NookColor using Tapatalk
 

dalingrin

Inactive Recognized Developer
Nov 6, 2007
1,433
2,756
There is a reason I've only released a 1.19ghz kernel. 1200mhz+ isn't stable no matter what voltage you push it to. 1.19ghz is really about the max you can get out of our CPU right now. Even 1.19ghz has sketchy stability. I think ~1.19ghz is the ceiling unless we increase the base dpll clock.
 
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paleh0rse

Senior Member
Jan 4, 2011
1,942
627
CM7 on Class10 SD, n31, 1190mhz "ondemand".

Best score: 2018
Average: mid-1800's

Nice work!!! and THANK YOU!

Now, if only one of the Gods would figure out the audio-processing issue that's causing the video problems, we'd be all set! :)
 

chisleu

Senior Member
Mar 7, 2011
1,042
105
Myrtle Beach SC
CM7 on Class10 SD, n31, 1190mhz "ondemand".

Best score: 2018
Average: mid-1800's

Nice work!!! and THANK YOU!

Now, if only one of the Gods would figure out the audio-processing issue that's causing the video problems, we'd be all set! :)

Yes I am very excited for this as well. Mr Dalingrin said he will be on that when he gets back from his spring break. I've been looking at it, but to say I'm ill prepared is an understatement.
 

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  • 20
    [KERNEL][CM7][Froyo] Dalingrin's OC kernel w/fixed IO perf (quadrant) & 1.2Ghz test

    Disclaimer: As always, flash at your own risk.

    Background
    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. (http://forum.xda-developers.com/showthread.php?t=1002504) 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 2.6.29.6 update: https://github.com/dalingrin/nook_kernel/commits/gingerbread-exp

    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?

    Information
    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):
    Regular
    http://www.mediafire.com/?k00ruvyulf01y64

    Extra network features (PPP, etc)
    http://www.mediafire.com/?i9h76wn483tk16v

    OC kernel (up to 1190Mhz, Interactive gov, BT and DSP):
    http://www.mediafire.com/?v6d2jpzaynvchde
    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.


    Feedback
    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...
    4
    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.
    1
    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!!
    1
    I tried both of these from SD card. The non-net features version boots but posted some terrible #s for me (<700 Quadrant and ~6-7 Linpack); the net features version doesn't boot. Is there something special I need to do with the first kernel to see the benefits? I checked and was clocked to 1.1GHz in CM settings.


    Mine on SD Card, CM7 #30

    @1100 GHz got 1918 Quadrant; 14.01 Linpack
    @800 MHz got 1347 Quadrant; 10.709 Linpack

    uSD 2GB no name, no class :)
    1
    Awesome! 2193 is just insane; i am glad to hear its working for you, since....(

    Well that was fun while it lasted. Picked up the NC after an hour of "sleep" and got past lock screen no problem. Opened up QuickPic, at 1190MHz the folder thumbnails never flew by so quickly (I've got 11000 JPEG, about 250Kb each, spread across 94 folders in the eMMC mount). Next checked eMail, it's been syncing with Exchange server OK (wireless set to never sleep). But then fired up Opera Mobile 11, and touchscreen response started acting wonky. Force killed Opera a few times, same touchscreen behavior and pages never finished loading.

    Nothing actually froze, so I rebooted. First two attempts locked up prior to lockscreen. Third attempt got past lock-screen but locked up again before I could get to Settings to dial back to 1100MHz. At that point I got out CWR 3.0.1.0 SD, booted into recovery, flashed back to madcat-032511, after which NC booted up no problem. Went into Setting/CyanogenMod/Performance and found clock speed defaulted back to 800MHz, promptly overclocked it back to 1100 MHz, and just now ran Quadrant SE three times and got best score 1966.

    I guess 1100MHz is best stable overclock for my NC :(.