AMD Posts New CPUFreq Driver For CPPC Support With Zen 2 CPUs

[amdtesterman]

Michael appears that you have not read me in the comments of your posts (year ago)about cppc AMD. There is no words about cppc first work to be only zen 2 ( in fact they said that it would be for 17h families at minimum and this is zen, zen +, zen 2...) and the comment for the lkml says that it would be for zen amd CPU in general being now only available in one CPU. Where did they say that it would be for zen 2 at minimum????

[cyring]

Since this patch, any better raw specifications of the performance registers have been published for family 17h ?
I will prefer going through MSR or PCI rather than ACPI.

[pal666]

Windows engineers are not writing AMD's linux drivers

welcome to real world, here they are

[Space Heater]

lol, you do exactly that when your windows engineers are writing linux driver because you have no money to double your headcount and write linux driver separately

Windows engineers are not writing AMD's linux drivers, and regardless raw software engineer bodycount has nothing to do with changing company culture.

[pal666]

No, you don't solve management and legal blocking or delaying upstreaming by throwing more software engineers at the problem.

lol, you do exactly that when your windows engineers are writing linux driver because you have no money to double your headcount and write linux driver separately

[Space Heater]

or maybe it is indeed something that can be simply solved by having more software engineers than total amd headcount including housecleaners

No, you don't solve management and legal blocking or delaying upstreaming by throwing more software engineers at the problem. That requires a shift in thinking and overall workflow.

[pal666]

To claim it's just money is being dishonest. Intel is more experienced contributing to open source projects and they have a better practice of allowing code to be upstreamed well before hardware is released. This isn't something that is simply solved by throwing money at it

or maybe it is indeed something that can be simply solved by having more software engineers than total amd headcount including housecleaners

[juno]

Phoronix: AMD Posts New CPUFreq Driver For CPPC Support With Zen 2 CPUs

@Michael: are you sure, it's only about Zen 2? The mailing list only mentions >=fam17h (Zen).

[brent]

Newer AGESA/BIOS versions should support CPPC2 on Zen 1 CPUs too, right? It would be interesting to see what kind of difference it makes.

[Space Heater]

Credit to Intel for what they do, but they have far more resources than AMD does.

To claim it's just money is being dishonest. Intel is more experienced contributing to open source projects and they have a better practice of allowing code to be upstreamed well before hardware is released. This isn't something that is simply solved by throwing money at it, it's a cultural change that has to take place, just look at the Navi code being held back by AMD's legal team. They simply aren't at the same level of maturity when it comes to contributing to linux and open source projects in general.