what kind of speed could arm jit produce ?

[stodag]

hi i was wondering what kind of speed boost could we expect when jit is introduced, compared to current andriod builds ? thx

[drgci]

(01-03-2013 04:17 PM)stodag Wrote:  hi i was wondering what kind of speed boost could we expect when jit is introduced, compared to current andriod builds ? thx

10x maybe?!

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(01-03-2013 04:17 PM)stodag Wrote:  hi i was wondering what kind of speed boost could we expect when jit is introduced, compared to current andriod builds ? thx

10x maybe?!

[stodag]

wow if thats true i woukdbt be far off full speed on my galaxy scl. im curently getting about 5 fps so times that by say 10 hey presto 50 to 60 fps.i hopd we see it this year as i know it takes a lot if hard work so wouldnt be expecting it anytime soon.

[Nixola]

I read somewhere that v0.5 will bring a ~2x speed improvement, without JIT...

[stodag]

yep to be honest iv seen a slight noticable improvement from the first of jan apk to the 3rd of jan apk. i posted it yesterday so thats good, im hopin for 70 to 80% full speed on my mobile maybe 100% with frameskip.

[tiktakt0w]

Well it seems to be running good on my gt-i9300.
Let's wait for multi - threading support and it will just get better.
Hoping the next build will come soon! And oh! that "android jit" seems to be good.

[cloud1250000]

I have more hope in dynarec (jit) for arm then multi-threading

[tiktakt0w]

(01-04-2013 05:09 AM)cloud1250000 Wrote:  I have more hope in dynarec (jit) for arm then multi-threading

Yup. I would also like to see the implementation of "jit" first before multi threading as more users will benefit from it as most of them does not have multi-core devices. Multi threading should be implemented after all sorts of things have been ironed out.

[GuilhermeGS2]

This speed increase with JIT also increases compatibility or are things different?

[Carter07]

(01-04-2013 06:40 PM)GuilhermeGS2 Wrote:  This speed increase with JIT also increases compatibility or are things different?

no "only" speed.

[cloud1250000]

jit may even break some game ahah this is why there is the choice between jit and interpreter

but jit will provide a good speed boost

[hacker3220]

Jit ?-I am new just wondering

[cloud1250000]

Dynarec, another way to interpret cpu

[hackf0rce]

I think they need to get some better compatibility with the interpreter first before building any form of a dynarec.

BTW, the Dreamcast emulator that DrkIIRaziel is finishing off for Android has a decent dynarec and is showing off full speeds on dual-core @ 1ghz Android devices. With the PSP having about 2x more power than the Dreamcast, with good optimization into the future, there's no reason why we can't get full speeds with PPSSPP.
Just check out these two videos: http://www.youtube.com/watch?v=BBbqo9AXjU8
and: http://www.youtube.com/watch?v=IzzTFLv8zv8

[drgci]

i am wondering if higher cpu frequency will help for better performance when arm jit will ready(i am not talking about multi core cpu but only the higher frequency of cpu)