JIT enabled by default?

[dishe]

I've seen some posts where people ask about enabling JIT on the Optimus. I'll admit, I don't know that much about JIT or what it does (I was under the impression it was for debugging, but apparently people are under the impression it speeds everything up??), but whatever it is I was also under the impression Froyo had it by default enabled.

So... is JIT something we already have enabled on our Optimus with Froyo? Or is this a pursuit worth doing?

 

[KSmithInNY]

I've seen some posts where people ask about enabling JIT on the Optimus. I'll admit, I don't know that much about JIT or what it does (I was under the impression it was for debugging, but apparently people are under the impression it speeds everything up??), but whatever it is I was also under the impression Froyo had it by default enabled.

So... is JIT something we already have enabled on our Optimus with Froyo? Or is this a pursuit worth doing?

JIT

JIT was bypassed with a workaround on the optimus but froyo has it by default. This simply enables it. You'll go from 4(ish) mflops to 8(ish) mflops.

 

[smccloud]

How do we enable JIT in the Optimus S?

 

[KSmithInNY]

How do we enable JIT in the Optimus S?

you flash the ROM that's coming out soon

 

[smccloud]

you flash the ROM that's coming out soon

Provided I can get my recovery working better by then?

 

[dishe]

JIT

JIT was bypassed with a workaround on the optimus but froyo has it by default. This simply enables it. You'll go from 4(ish) mflops to 8(ish) mflops.

Ok, so basically, its part of Froyo, but disabled on our devices right now.

What is the purpose for them to disable it? Keep benchmarks lower on cheap hardware or something?

As a previous contributing member of the XDA/PPCG rom cooking community, news of a custom rom forthcoming is excellent indeed!

I suppose there's an IRC channel somewhere I should be monitoring.

 

[drellisdee]

you flash the ROM that's coming out soon

Provided I can get my recovery working better by then?

Why wait when I have already done both for you guys?

Jit zip
Enable Jit on LG Optimus S, One, Vortex - Android Forums

Recovery
Custom Recovery Optimus S/ Thunderc-sprint - Android Forums

 

[smccloud]

Why wait when I have already done both for you guys?

Jit zip
Enable Jit on LG Optimus S, One, Vortex - Android Forums

Recovery
Custom Recovery Optimus S/ Thunderc-sprint - Android Forums

Did the JIT one. What is your recovery based on? I'm working on ClockworkMod and then hopefully CyanogenMod.

 

[drellisdee]

Did the JIT one. What is your recovery based on? I'm working on ClockworkMod and then hopefully CyanogenMod.

Is a heavily modded Amon_Ra with many new features added.

Just a heads up you will need to use code aurora froyo almond sources to build froyo system img not aosp.

 

[smccloud]

Is a heavily modded Amon_Ra with many new features added.

Just a heads up you will need to use code aurora froyo almond sources to build froyo system img not aosp.

kk.

 

[dishe]

Why wait when I have already done both for you guys?

Jit zip
Enable Jit on LG Optimus S, One, Vortex - Android Forums

Recovery
Custom Recovery Optimus S/ Thunderc-sprint - Android Forums

I'd love to do the JIT one... totally new to the Android world, are there instructions to do just that one or are we expected to have read up on the custom recovery system first?

 

[ericizzy1]

can any developer confirm this?

found this on another place:

"Even though froyo comes with a very stable jit, for some reason they decided to disable it on this phone, to re-enable it, edit your build.prop, search for
dalvik.vm.execution-mode=int:fast
change it to
dalvik.vm.execution-mode=jit

Took my linpack to 7.4 and my quadrant to 480

While you're editing, if you have the optimus t or your optimus s didn't update, change:
dalvik.vm.heapsize=24
to
dalvik.vm.heapsize=32

This will make your phone a little more stable."


can anyone confirm this is legit? thanks

 

[dishe]

So, maybe this is a more generic Android/Froyo question, but it seems that native JIT support was one of the big selling points of Froyo initially.

Why are handsets like ours being sold with JIT disabled?

Is there a reason manufacturers don't want us to use it?