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nvqanh_1111
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re: Renesas drives eight-core 'big-little' into automotive
nvqanh_1111   4/5/2013 5:53:41 AM
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Several my past colleagues in Vietnam contributed to the development of this chip, so excited. Image recognition Engine with SH is the greatest advantage of this chip over other ARM-based chips, i think.

sranje
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re: Renesas drives eight-core 'big-little' into automotive
sranje   3/31/2013 7:08:16 AM
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Maybe it is an act of desperation... No sockets in smartphones

help.fulguy
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re: Renesas drives eight-core 'big-little' into automotive
help.fulguy   3/27/2013 6:19:48 PM
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Cortex-A15 sucks too much power. Almost 6W at 2GHz for a Dual Core version (Just CPU). ARM has lost power advantage with A15 and so, now all these b.L BS to cover up.

selinz
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re: Renesas drives eight-core 'big-little' into automotive
selinz   3/27/2013 5:59:48 PM
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I think a comparison of power used by an infotainment system versus power used by the drive train is in order here. I suspect that it's like expecting your electric bill to change because you unplug your cell phone charger when not charging your phone...

tangey
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re: Renesas drives eight-core 'big-little' into automotive
tangey   3/27/2013 5:27:05 PM
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I think it is a power dissipation issue rather than power consumption.

Peter Clarke
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re: Renesas drives eight-core 'big-little' into automotive
Peter Clarke   3/27/2013 3:56:22 PM
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I think the expectation the automobile makers have is that the infotainment systems they provide need to be at least as good as consumers are used on mobile devices. As to power saving, the existence of runtime electricity generation and batteries does not reduce the power saving from big-little. I am sure the argument runs that if big-little was not used those infotainment systems would consume more power, run hotter in seat backs and the dashboard, and be an unnecessary drag on the primary fuel system.

eewiz
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re: Renesas drives eight-core 'big-little' into automotive
eewiz   3/27/2013 2:03:55 PM
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The power savings from "big little" may not be significant in case if automobiles, where you have a runtime power generation and a huge battery. My question is do automotive apps even need an 8 core app processor? Seems like an overkill to me.

Peter Clarke
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re: Renesas drives eight-core 'big-little' into automotive
Peter Clarke   3/27/2013 11:13:36 AM
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@neel210 We are not told this explicitly by Renesas, but big-little will have the same advantage that it does in hand-held devices - more power efficient execution of functions compared with non big-little systems. This is because a lower processing load can be performed on a little core with the big partner switched off. The big core wakes up only when needed for a greater processing load, at which point the small core switches off.

neel210
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re: Renesas drives eight-core 'big-little' into automotive
neel210   3/27/2013 6:43:32 AM
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What's the advantage of having big little in automotive systems ?



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