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2012-02-05
, 07:28
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Posts: 313 |
Thanked: 247 times |
Joined on Jan 2010
@ USA
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#22
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Originally Posted by Kangal
For 720p playback bottleneck is not the 2D/3D graphics (GPU) but rather the decoding on DSP/CPU. The display has to just render at 480p resolution and it should be capable to handle frame rates much higher than 30 fps
Overclocking the gpu should make the processing of graphics faster...basically can push out more polygons/triangles faster.
So if you are playing a 720p video at a max frequency of 20fps, overclocking the gpu *may* make it run faster example 30fps.
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2012-02-05
, 12:17
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Posts: 1,789 |
Thanked: 1,699 times |
Joined on Mar 2010
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#23
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Originally Posted by dsawhney
That's true. But what about animated videos like from a game/app ?
For 720p playback bottleneck is not the 2D/3D graphics (GPU) but rather the decoding on DSP/CPU. The display has to just render at 480p resolution and it should be capable to handle frame rates much higher than 30 fps
It should make something speedier.
Anyways on ARM processors, everything is linked; hence SystemOnChip.
Increasing the voltage overclocks the SoC, hence the cpu overclocks, as well as the bus, and consequently the gpu aswell. But it all depends on the actual driver's behaviour ofcourse, which is usually made to work acceptably and never improved after sale (at least on mobile devices). I have yet to hear any gpu overclock without cpu overclock.
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2012-02-05
, 12:25
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Posts: 1,225 |
Thanked: 1,905 times |
Joined on Feb 2011
@ Quezon City, Philippines
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#24
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Originally Posted by Kangal
That would probably use the DSP to decode the video.
That's true. But what about animated videos like from a game.
WRT the frequency, it should be around 200MHz.
I don't think we're getting much by OCing the SGX: the only thing that actively uses the GLES on the N900 is Hildon to animate the pretty effects.
It's not like you're going to play id Tech 5 games on it or anything.
__________________
N9 PR 1.3 Open Mode + kernel-plus for Harmattan
@kenweknot, working on Glacier for Nemo.
N9 PR 1.3 Open Mode + kernel-plus for Harmattan
@kenweknot, working on Glacier for Nemo.
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2012-02-05
, 12:34
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Posts: 1,789 |
Thanked: 1,699 times |
Joined on Mar 2010
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#25
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^but id Tech 4 is out. Surely we can OC that high enough to enjoy Quake4 and boil some eggs 
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2012-02-05
, 12:59
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Posts: 470 |
Thanked: 399 times |
Joined on Jul 2011
@ Croatia
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#26
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Originally Posted by Kangal
oveclocking TI OMAP cpu does NOT overclock the sgx core, only gpu that gets overclocked together with cpu is the one in qualcom crap
That's true. But what about animated videos like from a game/app ?
It should make something speedier.
Anyways on ARM processors, everything is linked; hence SystemOnChip.
Increasing the voltage overclocks the SoC, hence the cpu overclocks, as well as the bus, and consequently the gpu aswell. But it all depends on the actual driver's behaviour ofcourse, which is usually made to work acceptably and never improved after sale (at least on mobile devices). I have yet to hear any gpu overclock without cpu overclock.
raising voltage also doesnt overclock anything cpu, gpu or dsp, you raise voltage only to get a stable overclock
unfortunately i think the way for sgx overclocking is yet to be found....
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2012-02-05
, 14:45
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Posts: 1,789 |
Thanked: 1,699 times |
Joined on Mar 2010
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#27
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Originally Posted by GrimyHR
Here's a kernel for the SGS i9000 (Exynos 3110/Hummingbird S5PC110):
oveclocking TI OMAP cpu does NOT overclock the sgx core, only gpu that gets overclocked together with cpu is the one in qualcom crap
raising voltage also doesnt overclock anything cpu, gpu or dsp, you raise voltage only to get a stable overclock
unfortunately i think the way for sgx overclocking is yet to be found....
http://forum.xda-developers.com/show....php?t=1041532
It still has the outdated drivers for the SGX, despite this raising the voltage increases the cycle speed of both the cpu and gpu concurrently (in varied frequencies of course).
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2012-02-05
, 15:55
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Posts: 470 |
Thanked: 399 times |
Joined on Jul 2011
@ Croatia
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#28
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Originally Posted by Kangal
yes bu if im not mistaken we lack the added bus/gpu overclock they have there, maybe if somebody implements it in our kernel...and again raising the voltage does not overclock anything, my cpu is 3.3GHz stock on 1.4v, curently it is on 3.8GHz on 1.4v, if i raise my voltage my freq will remain 3.8GHz
Here's a kernel for the SGS i9000 (Exynos 3110/Hummingbird S5PC110):
http://forum.xda-developers.com/show....php?t=1041532
It still has the outdated drivers for the SGX, despite this raising the voltage increases the cycle speed of both the cpu and gpu concurrently (in varied frequencies of course).
Last edited by GrimyHR; 2012-02-05 at 16:00.
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2012-02-07
, 01:46
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Posts: 1,746 |
Thanked: 1,832 times |
Joined on Dec 2010
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#29
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it'll eat battery stupidly, if you want generally faster animation overclock the DSP and its so damn fast, but for me the battery was drained so fast cause i kept it on the max constantly.
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2012-08-31
, 02:32
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Posts: 204 |
Thanked: 754 times |
Joined on Jan 2012
@ Finland
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#30
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grep -2 fclock arch/arm/mach-omap2/board-rx51-video.c
static struct sgx_platform_data rx51_sgx_data = {
.fclock_max = 110666666,
};
I don't know if it is capped on chip or not. Without fclock_max it defaults to 87MHz if memory serves. How it affects battery life I can't say, there is power management though.
Last edited by Skry; 2012-08-31 at 02:48.
static struct sgx_platform_data rx51_sgx_data = {
.fclock_max = 110666666,
};
I don't know if it is capped on chip or not. Without fclock_max it defaults to 87MHz if memory serves. How it affects battery life I can't say, there is power management though.
Last edited by Skry; 2012-08-31 at 02:48.
So if you are playing a 720p video at a max frequency of 20fps, overclocking the gpu *may* make it run faster example 30fps.