Zhaoxin Finally Adding "Lujiazui" x86_64 CPU Tuning To GCC

[phoronix]

Phoronix: Zhaoxin Finally Adding "Lujiazui" x86_64 CPU Tuning To GCC

Introduced back in 2019 by the VIA + Shanghai owned Zhaoxin was the ZX-E / KX-6000 series x86_64 processors. Finally in 2022 the proper GCC compiler tuning support has been published for these processors that are part of the "Lujiazui" microarchitecture...

https://www.phoronix.com/scan.php?pa...n-lujiazui-GCC

[arun54321]

Do these cpus include Chinese hw backdoor?

[Markospox]

Do these cpus include Chinese hw backdoor?

You bounce ping-pong ball off it few times and a Chinese guy comes out lol.

[ireri]

Do these cpus include Chinese hw backdoor?

Hard to say, until we can test them.

[tuxd3v]

Do these cpus include Chinese hw backdoor?

does those American cpus include hw backdoors?

[asriel]

does those American cpus include hw backdoors?

Yes - it is called intel management engine.

[Adarion]

Or AMD PSP for that matter.

Problem ist: You never really know unless things are a) documented b) you control the process of manufacture from Verilog schemes (or whatever people use) to tapeout and final installtion in your system.
But every "black box" is suspicious by design.

More on topic: I guess inital steps have to come from the manufacturers themselves. It's always good if you start sending documentation and code/patches. Especially in this case when GCC developers around the world can hardly pick up one of these machines as they seem to be very limited to a regional Asian market.

[IActuallyKnowItAll]

I hope GCC people enforced their code guidelines well here, for the sake of their sanity down the road. I've worked with enough Chinese written code that I can tell for sure I'd rather off myself than maintain a freely written Chinese code.

[coder]

I hope GCC people enforced their code guidelines well here, for the sake of their sanity down the road.

Agreed, but I think there's no need to single out Chinese. It's difficult for anyone to write good code in a human language of which they lack complete mastery.

Perhaps another big other issue you might be encountering is that they probably skew towards the lower-end of the experience scale.