News Intel Core Ultra 7 155H and AMD Ryzen 7 7840U have an iGPU-bound benchmarking rematch in Linux

[Admin]

The Intel Core Ultra 7 155H gets benchmarked under Linux against the Ryzen 7 7840U and the Core i7 1280P, revealing significant improvements over past-generation iGPU architecture.

Intel Core Ultra 7 155H and AMD Ryzen 7 7840U have an iGPU-bound benchmarking rematch in Linux : Read more

 

[-Fran-]

Wait, worse CPU but better iGPU?

You know what that reminds me of? Trinity and all Pilediver based APUs.

"But no, that's DIFFERENT!". Ok, sure.

Regards.

 

[bit_user]

Wait, worse CPU but better iGPU?

Yes, though I think the Windows benchmarks might be a little more balanced between the Ryzen 7840U and the Core Ultra 7 155H:

https://www.notebookcheck.net/Acer-...ra-7-impresses-with-its-AI-core.783349.0.html
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The first few benchmarks all seem to favor Meteor Lake. It's not until you hit LibreOffice, R, and the AIDA64 synthetic benchmarks that the tide turns in favor of Ryzen.

 

[cyrusfox]

Linux is missing the thread director, and I believe that is likely torpedoing the cpu benchmark comparison on the Linux system, I still fully expect Intel to lose to AMD on mobile, but not by the margins the first test showed. A lot of those losses may be from linux loading up the SOC e-cores when they have no business running high priority threads. As the linux Kernel adapts to this tiered computing hierarchy, the discrepancy chasm will close.

 

[bit_user]

Linux is missing the thread director,

No, I'm pretty sure they added support for it in early 2022. It did lag the launch of Alder Lake, but not by a whole lot.

I believe that is likely torpedoing the cpu benchmark comparison on the Linux system,

Phoronix just posted a performance comparison of the same Meteor Lake laptop on Linux and Windows. I wish it also included the Ryzen 7840U, but alas it did not. Meteor Lake performed significantly better on Linux. In the conclusion, the author states:

"This lead isn't as wide as we've seen on some higher core count systems but overall Linux had a strong showing in the CPU tests for the most part. This was good to see as there was some curiosity on whether the Linux kernel is behaving optimally yet for Meteor Lake CPUs but even with the single-threaded tests I didn't run into any awkward situations yet. Though with Linux results proving competitive, it does for the most part rule out Linux being to blame for the poor CPU performance benchmarks on Meteor Lake."

Source: https://www.phoronix.com/review/intel-meteorlake-windows-linux
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I still fully expect Intel to lose to AMD on mobile, but not by the margins the first test showed. A lot of those losses may be from linux loading up the SOC e-cores when they have no business running high priority threads.

Agreed. I had similar thoughts. I also wondered if Meteor Lake's enhanced Thread Director might not be fully supported, although Intel is usually pretty good about getting all the necessary patches merged well in advance of new product launches.

Still, I would not be surprised if some future patches make Meteor Lake a lot more competitive in Linux. We'll see.

As the linux Kernel adapts to this tiered computing hierarchy, the discrepancy chasm will close.

ARM has been doing big.Little for over a decade. Linux is the kernel Android uses. Alder Lake launched over 2 years ago. So, I think the kernel is most of the way up that learning curve.