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[beta] Run your Hero at 660mhz!


Guest Lox-

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Guest grassiekuik
We have to assume that if it infact was an "overlcock" of the CPU such benchmarking tools as Linpack would show a significant increase in MFLOP/s throughput, as this is not the case(i haven't seen any) i believe you are correct in assuming that this infact does nothing to overclock the CPU.

It's a very small difference but the nr 1 on http://www.greenecomputing.com/apps/linpac...pack-by-device/ (search for hero) is me. Even though i don't think you'll notice the difference in every day use. Nice to see Paul's rom is the quickest

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Guest Trekster2000
It's a very small difference but the nr 1 on http://www.greenecomputing.com/apps/linpac...pack-by-device/ (search for hero) is me. Even though i don't think you'll notice the difference in every day use. Nice to see Paul's rom is the quickest

Did a quick test.

Before:

2.27 Mflops/s

Time: 2.39 seconds

After:

2.235 Mflop/s

Time: 2.42 seconds

Going back until there is hard evidence that this works.

As far as i can see this is based on Eugenes work for the G1. This has been confirmed as not working so this is not working for our Hero either.

Edited by Trekster2000
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First of all, the word "overclocking" has a specific meaninng, which to me is this one: http://en.wikipedia.org/wiki/Overclocking.

Second. if at any time a CPU clock changes, under Linux 2.6 kernel you'll see the new clock rate in /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq.

Third, the BogoMips (http://en.wikipedia.org/wiki/BogoMips) is calculated only once at the boot and then never again.

Fourth, it's normal when changing kernel (version) to get better (or worse) BogoMips scores, because of a number of reasons, among which I would number:

- quality of CPU tuning

- amount of cache available

- quality of code generated by the assembler/compiler used.

So what I'd say is that Lox's kernel can run (at least) the BogoMips loop faster (more efficiently) than the "normal" kernels.

If this kernel is faster in (almost) all other stuff, then Lox work is a great breakthrough, no question on this and kudos to him from all of us.

Otherwise is just a "false positive", which can happen to anyone of us.

So what?

Simply, run as many benchmark tools as possible before and after the Lox kernel is installed and booted.

Possibly in the same way (external power supply, no CPU frequency tool running, long screen blanking delays and so on).

Then compare the numbers.

Anything else looks to me worthless discussing.

This is my EUR 0.01 contribution.

Saddly all that is true. For those wondering what I did, everything has been committed to github before I released that kernel (master-oc branch)

http://github.com/loxK/android-msm-2.6.27-hero

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Saddly all that is true. For those wondering what I did, everything has been committed to github before I released that kernel (master-oc branch)

http://github.com/loxK/android-msm-2.6.27-hero

Sadly? I'll be happy if all this is true: more power for free!

Could you please point me to the code where the "overclocking" is done?

I'm quite curious as people is reporting that only the BogoMips are higher, not the CPU benchmarks ...

Edited by ippoP
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