Linux Power Efficiency Of Skylake, Broadwell, Haswell & Kaveri Compared

[przemoli]

Fedora 22 use LLVM 3.6.2 right now...

RadeonSI and up will have subpar performance compared to both Catalyst and LLVM 3.7.

Not saying that results are invalid, just that for someone who wants more there is more to be had

PS Michael do post LLVM version alongside Mesa version!

[utack]

For us who has grown up, compute/energy density is nigh on the only thing that matters.

Your country charges so much for power that you care about ~20% more energy efficiency in a _desktop_. Really?
Personally I am fine with a i5-2500k that is a older fab tech, but with solder so it can be cooled to sane temperatures without a $150 water cooler.

[Michael]

Fedora 22 use LLVM 3.6.2 right now...

RadeonSI and up will have subpar performance compared to both Catalyst and LLVM 3.7.

Not saying that results are invalid, just that for someone who wants more there is more to be had

PS Michael do post LLVM version alongside Mesa version!

Is Mesa exposing the built against LLVM version somehow yet?

[r1348]

Is Mesa exposing the built against LLVM version somehow yet?

Is Fedora's mesa built against different LLVM versions than what is shippped? Because otherwise F22 is still at 3.5.0.

[Jabberwocky]

I would love to see how ivy bridge compares to these tests, specifically the i7-3770S and i7-3770T variants with emphasis on CPU not GPU.

Thanks for this review Michael.

[przemoli]

Is Mesa exposing the built against LLVM version somehow yet?

Looking into it. Though if only single LLVM is installed then:

ls /usr/bin | grep lli-child-target | grep -oh [[:digit:]].[[:digit:]]

will give You that number. Hope it helps.
(It use file from llvm-runtime from Ubuntu so I think that file is safe bet)

[przemoli]

OK. Who have some RadeonSI hw and is brave enough to run:

ldconfig -p | grep ll

[dungeon]

Is Mesa exposing the built against LLVM version somehow yet?

Yoo have it in glxinfo with recent mesa.

[milkylainen]

Your country charges so much for power that you care about ~20% more energy efficiency in a _desktop_. Really?
Personally I am fine with a i5-2500k that is a older fab tech, but with solder so it can be cooled to sane temperatures without a $150 water cooler.

You can ask Michael what he thinks about runaway electrical bills and cooling etc.
These desktop CPU's are indicative for their respective architectures. While you are right for a single CPU desktop, most of us who have real jobs deal with large quantities of servers, clusters etc. Compute/Power efficiency is damn near everything in the equation.

[bug77]

I'm still hoping AMD will respond with an enthusiast APU.

I'm not sure what you mean by that. In my mind an enthusiast is someone who has to have performance. And an integrated GPU just doesn't deliver on that front.

I'd love a fat APU with 14/16 nm fab processing + HBM and no additional ddr3/4 ram for a compact pc.

And what use would you have for a computer without RAM?