Root How to enable JIT?

[shadowdude777]

Hey guys, can anyone who has used JIT before give me a link to how I should enable it(I know Fabolous uses it but I don't know who else)?

I tried searching for JIT in this forum and got nothing. Alldroid didn't seem to help much more. It seems like there's really little to no documentation on how to get this running. Can anyone point me in the right direction?

Also, I assume that it's still not too stable, so I should probably take a Nandroid backup first, right?

 

[Redflea]

There's a JIT thread on Alldroid in the Droid development forum, IRRC.

The files are available in that thread, maybe in the OP as well as in another post on page 7 or so?

Instructions posted in that thread...basically you're moving three files to the lib and bin directories and adding a line to the bottom of the build.prop file to enable it all.

JIT Enable:

abd pull /system/build.prop build.prop
Open in WordPad and add
Add as the last line:
dalvik.vm.execution-mode=int:jit
SAVE

adb shell mount -o remount,rw /dev/mtd/mtdblock4 /system
adb push dalvikvm /system/bin/
adb push libdvm.so /system/lib/
adb push libnativehelper.so /system/lib/
adb shell chmod 755 /system/bin/dalvikvm
adb push build.prop /system/
adb shell reboot

JIT Disable:

Change:

dalvik.vm.execution-mode=int:jit

To:

dalvik.vm.execution-mode=int:fast

 

[alostpacket]

I thought most everyone who has tried it ended up disabling it for it causing deal breaking bugs.

Curious, is it more stable now?

 

[OMJ]

I thought most everyone who has tried it ended up disabling it for it causing deal breaking bugs.

Curious, is it more stable now?

With the new ere25 builds its running way better. I have been running it for 2 days with no issues.

If you don't wanna mess in adb try this

JIT for NOOBS - Droid Forum - Verizon Droid & the Motorola Droid Forum

 

[shadowdude777]

I couldn't find the three files that were necessary, so I took them out of the .zip in Chevy's post that OMJ linked to. And then I did it through ADB as RedFlea said to do.

As for JIT... I really can't even tell that I have it installed. Maybe things feel a LITTLE snappier? I don't really notice much. But on the other hand, things don't seem to be FCing yet like everyone says JIT causes. Let's see how this plays out.

Thanks for the help, RedFlea and OMJ!

EDIT: I guess I spoke too soon! The FCs have started!

 

[OMJ]

I couldn't find the three files that were necessary, so I took them out of the .zip in Chevy's post that OMJ linked to. And then I did it through ADB as RedFlea said to do.

As for JIT... I really can't even tell that I have it installed. Maybe things feel a LITTLE snappier? I don't really notice much. But on the other hand, things don't seem to be FCing yet like everyone says JIT causes. Let's see how this plays out.

Thanks for the help, RedFlea and OMJ!

EDIT: I guess I spoke too soon! The FCs have started!

If you aren't using on of the newer ere 25 roms jit probably won't work well

 

[xvenom89]

JIT isn't necessary. At all. Don't bother with it. The 2.1 ROMs (Bugless Beast, in particular) are incredibly fast.

 

[shadowdude777]

If you aren't using on of the newer ere 25 roms jit probably won't work well

I am. I get random reboots regardless.

 

[Fabolous]

Seems like all the new ESE53 ROMs are coming with JIT preenabled. I haven't had any issues with JIT and Pete's BB ERE25 ROM.

Gonna give his ESE53 ROM a try now...

 

[discohornet]

Seems like all the new ESE53 ROMs are coming with JIT preenabled. I haven't had any issues with JIT and Pete's BB ERE25 ROM.

Gonna give his ESE53 ROM a try now...

where is his ese53 rom? dont see it at alldroid

 

[Fabolous]

where is his ese53 rom? dont see it at alldroid

Sorry, I was too excited installing it I forgot to post the link. I made a thread here:

http://androidforums.com/all-things-root-droid/51165-rom-2-1-bugless-beast-v0-5-ese53-base.html

 

[Redflea]

I've tried JIT with several 2.01 ROMs, and with ERE25 ROMs and it has never been stable for me for some reason. So I've abandoned it for now. When I upgrade to an ESE53 or later ROM I may give it a try again, but as noted, the current ROMs are so fast (I'm using Chevy's ERE25 Beta ROM) that I rarely find myself wishing things would be faster...

 

[njn]

Hi, I tried to enable JIT in android emulator but failed. I can 'pull' things from the device but cannot 'push'. For example, I pulled build.prop, and then added the line to enable JIT and then when I try to push it back to /system/build.prop I get this error:

failed to copy 'build.prop' to '/system//build.prop': Out of memory

Is there any way to make the emulator JIT enabled ? Thanks in advance for help.

 

[bp328i]

Hi, I tried to enable JIT in android emulator but failed. I can 'pull' things from the device but cannot 'push'. For example, I pulled build.prop, and then added the line to enable JIT and then when I try to push it back to /system/build.prop I get this error:

failed to copy 'build.prop' to '/system//build.prop': Out of memory

Is there any way to make the emulator JIT enabled ? Thanks in advance for help.

If your on CyanogenMod 5.0.5.7 you can go to the market and search for JIT and there is a free app that does it for you.

Or you can copy your build.prop to your sd card and then use your PC and open it with Notepad++ (google it and you can download it free) and add "dalvik.vm.execution-mode=int:jit" no quotes to the last line save and put back on your sd card then use emulator.
su
mount -o remount,rw -t yaffs2 /dev/block/mtdblock4 /system
busybox cp /sdcard/build.prop /system
mount -o remount,ro -t yaffs2 /dev/block/mtdblock4 /system
sync
reboot

 

[shadowdude777]

Hi, I tried to enable JIT in android emulator but failed. I can 'pull' things from the device but cannot 'push'. For example, I pulled build.prop, and then added the line to enable JIT and then when I try to push it back to /system/build.prop I get this error:

failed to copy 'build.prop' to '/system//build.prop': Out of memory

Is there any way to make the emulator JIT enabled ? Thanks in advance for help.

Can you push it to any other directory? If you can, do that and then go into Terminal Emulator on the phone and do:

su
cat [location you pushed to] > /system/build.prop

EDIT: Make sure you mount system as r/w first, of course.

 

[DroidSuks]

Jitter from the market.


or


(4-07) Jrummy's Remix V0.5 - Cyanmod 5.0.5.7 ** 3 Themes And Many Extras ** - CyanogenMod Forum


Download the "goodies" package and install it via update.zip . Should work on any ROM and includes the enable / disable script that allows you to turn it off... or on depending on what your preference is via term. emu.