It's been a while since my last set, so I am happy to present to you the most advanced kernels for Droid to date. This set is built from the latest source, I did not build upon someone else's, I started from scratch. Changes from my last version include updating the Interactive governor to the version found in the .38 kernels. No other kernels out have this governor
yet, it has two tuneables rather than just one. I also updated the compcache module to the new zram.ko, meaning these kernels will be fully compatible with CyanogenMod and others. Thanks to cvpcs, the new .35 kernel USB switches have also been added, fixing USB tethering in Gingerbread. SDCard throughput has also been increased, for faster read/write speeds.
I did not include the "new" governors that are floating around (SmartAss, SmartMod, BumbleBee, etc). All of these are hacked versions of the old Interactive governor (not the new .38 kernel one), meaning they are outdated. All of these governors are modifications of eachother. I will not be adding any of these governors so do not ask. I assure you, using the Interactive governor built into my kernels will yield better results anyways. Here is a quote straight from the .38 kernel source, "Use the CPUFreq governor 'interactive' as default. This allows you to get a full dynamic cpu frequency capable system by simply loading your cpufreq low-level hardware driver, using the 'interactive' governor for latency-sensitive workloads." This would explain why manufacturers have chosen it to be the default governor on most of the new devices, including the Motorola Xoom.
I also kept the default compression method of the kernel. After conducting a bit of research, LZMA compression and others seen in some kernels take longer to decompress. To put this in other words, the phone will take longer to boot by not using the default compression method.
Features:
- Available in low, standard, or increased voltages
- Interactive governor ported from .38 kernel
- New compcache module: zram.ko
- USB switches from .35 kernel
- Increased sdcard throughput
- Bug fixes from newer kernels
- Built in OMAP temperature sensor
- All of the official governors
- Lightweight, stripped of unneeded features
- Added most popular, requested modules and features
Downloads:
Increased voltage (IV)
Low voltage (LV)
Standard voltage (SV)
Note: You will need to use an app or script to have these kernels overclock themselves. If not they will default to whatever the ROM developer has in the ramdisk (most likely 600MHz). To overclock any GPA build, flash
AutoOverClock.zip
Update: I just wanted to give you guys/gals more info about the Interactive governor. I have seen some users on a variety of ROMs saying that the phone takes a while to wake up after pressing the battery button. It all depends on the governor and settings the ROM dev has made in the ramdisk or elsewhere (init.d). You can make a fast kernel, and have the ramdisk or other files slow it to a crawl. On my GPA builds, using the interactive governor there is no wake up delay. That being said, on other ROMs I would suggest switching to, if not already using, the interactive governor. From there if you still see a wake up delay lower this tuneable:
/sys/devices/system/cpu/cpufreq/interactive/go_maxspeed_load
The default is 85, a good number for battery saving, but not for performance. For example, you may lower this number to 80 so the governor will ramp up to max speed (highest slot) faster. You may also want to note that the Motorola Xoom uses the value of 80 by default, maybe you will be happy with this value as well.
Just FYI there is yet another tuneable in this governor:
/sys/devices/system/cpu/cpufreq/interactive/min_sample_time
This tuneable represents the minimum amount of time to spend at the current frequency before ramping down. This is to ensure that the governor has seen enough historic CPU load data to determine the appropriate workload. Default is 80000 uS.
Unfortunately, SetCPU and possibly other applications have yet to put these tuneables to use via a GUI. So one must have a script or command change them. As you can see, this governor will allow you to save battery or crank out the performance so adjust it to your liking.
