Cortex A15: Kraken

While SunSpider wasn't a great performance target for Exynos 5250, Kraken is a different story entirely. The Cortex A15s complete the task significantly quicker than the competition, and as a result achieve competitive energy usage although at significantly higher peak power consumption.

 

 

Task Energy - Kraken - Total Platform

Despite the high peak power consumption of the Nexus 10 and its Cortex A15s, total energy usage is the lowest out of any of the contenders here since the Exynos 5250 is able to complete the benchmark so quickly. Intel is up next, followed by Qualcomm.

Once again we're seeing peak CPU power usage of ~3W, compared to < 1.5W for the competition. The performance advantage is enough to justify the added power, however in devices that simply can't dissipate this much heat (e.g. smartphones) I wonder what will happen.

Task Energy - Kraken - CPU Only

Isolate the CPU cores themselves and the race is much closer, this time with Qualcomm taking the lead.

Task Energy - Kraken - GPU Only

When mostly idle, the Mali-T604 on Samsung's 32nm LP (HK+MG) process barely sips power.

Kraken - Max, Avg, Min Power

Max Power Draw - Kraken - Total Platform

Max Power Draw - Kraken - GPU Only

Max Power Draw - Kraken - CPU Only

Average Power Draw

Average Power Draw - Kraken - Total Platform

Average Power Draw - Kraken - GPU Only

Average Power Draw - Kraken - CPU Only

Minimum Power Draw

Min Power Draw - Kraken - Total Platform

Min Power Draw - Kraken - GPU Only

Min Power Draw - Kraken - CPU Only

Cortex A15: SunSpider Cortex A15: RIABench
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  • StrangerGuy - Sunday, March 24, 2013 - link

    You really think having a slightly better chip would make Samsung risk everything to get locked into a chip with an ISA owned, designed and manufactured by one single sole supplier? And when that supplier in question historically has shown all sorts of monopolistic abuses?

    And when a quad A7 could already scroll desktop sites in Android capped at 60 fps additional performance provides very little real world advantage for most users. I'll even say most users would be annoyed by I/O bottlenecks like LTE speeds long before saying 2012+ class ARM CPUs are too slow.
    Reply
  • duploxxx - Monday, January 07, 2013 - link

    Now it is clear that when Intel provides that much material and resources that they know they are at least ok in the comapere against ARM on cpu and power... else they wouldn't make such a fuss...,

    but what about GPU? any decent benchmark or testing available on GPU performance.

    I played in december with HP envy2 and after some questioning they installed a few light games which were "ok" but i wonder how well the gpu in the atom really is, power consumption looks ok, but i preffer a performing gpu @ a bit higher power then a none performing one.
    Reply
  • memosk - Tuesday, January 08, 2013 - link

    It looks like old problem with PowerPc v.s. PC .
    PowerPC have had a faster Risc procesor and PC have had slower x86 like procesor .

    The end result was that clasical PC has won this Battle . Because of tradition and what is more important , you need knowledge about platform over users, producers, programers ...

    And you should think about economical thinks like mortage and whole enviroment named as Logistik.

    The same problem was Tesla vs. Edison. Tesla have had better ideas and Edison was Bussines-man. Who has won ? :)
    Reply
  • memosk - Tuesday, January 08, 2013 - link

    Nokia tryed seriosly sell windows 8 phones without SD cards And they said because of microsoft .

    How can you then compete again android with SD cards. But if you copy an Apple you think it has logic.

    You need generaly: complete and logic and OWN and CONSISTENT and ORIGINAL strategy.

    If you copy something it is dangerous that you strategy will be incostintent , leaky , "two way" , vague also with tragical errors like incompatibility or like legendary siemens phones: 1 crash per day . :D
    Reply
  • apozean - Friday, January 11, 2013 - link

    I studied the setup and it appears and Intel just wants to take on Nvidia's Tegra 3. Here are a couple of differences that I think are not highlighted appropriately:

    1. They used an Android tablet for Atom, Android tablet for Krait, but a Win RT (Surface) for Tegra 3. It must have been very difficult to fund a Google Nexus 7. Keeping the same OS across the devices would have controlled for a lot of other variables. Wouldn't it?

    2. Tegra 3 is the only quad core chip among chips being compared. Atom and Krait are dual-core. If all four cores are running, wouldn't it make a different to the idle power?

    3. Tegra 3 is built on 40nm and is one of the first A9 SoCs. In contrast, Atom is 32nm and Krait is 28nm.

    How does Tegra 3 fits in this setup?
    Reply
  • apozean - Friday, January 11, 2013 - link

    Fixing typos..

    I studied the setup and it appears that Intel just wants to take on Nvidia's Tegra 3. Here are a couple of differences that I think are not highlighted appropriately:

    1. They used an Android tablet for Atom, Android tablet for Krait, but a Win RT (Surface) for Tegra 3. It must have been very difficult to fund a Google Nexus 7. Keeping the same OS across the devices would have controlled for a lot of other system variables. Wouldn't it?

    2. Tegra 3 is the only quad core chip among chips being compared. Atom and Krait are dual-core. If all four cores are running, wouldn't it make a difference to the idle power?

    3. Tegra 3 is built on 40nm and is one of the first A9 SoCs. In contrast, Atom is 32nm and Krait is 28nm.

    How does Tegra 3 fit in this setup?
    Reply
  • some_guy - Wednesday, January 16, 2013 - link

    I thinking this may be the beginning of Intel being commoditied and the end of the juicy margins for most of their sales.

    I was just reading an article about how hedge funds love Intel. I don't see it, but that doesn't mean that the hedge funds would make money. Perhaps they know the earning report that is coming out soon, maybe tomorrow, will be good. http://www.insidermonkey.com/blog/top-semiconducto...
    Reply
  • some_guy - Wednesday, January 16, 2013 - link

    I meant to say "but that doesn't mean that the hedge funds won't make money." Reply
  • raptorious - Wednesday, February 20, 2013 - link

    but Anand has no clue what the rails might actually be powering. How do we know that the "GPU Rail" is in fact just powering the GPU and not the entire uncore of the SOC? This article is completely biased towards Intel and lacks true engineering rigor. Reply
  • EtTch - Tuesday, April 02, 2013 - link

    My take in all of this is that ARM and x86 is in comparable at this point when it comes to comparing the different instruction set architectures due to different the lithography size and the new 3d transistors. When ARM based SOC has finally all the physical features of the x86 then it's only truly comparable. Right now x86 is most likely to have a lower power consumption than ARM based processors that has a higher lithographic size than itself. (I really don't know what it's called but I'll go out on a limb and call it lithography size even though I know that I am most likely wrong) Reply

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