AMD Ryzen 5000 Series (Zen 3) Linux Expectations - Should Be Good But No "Znver3" Compiler Yet

[scjet]

Judging by past experience of the way AMD devs (remember opensource ?!), and Linux devs incorporate (good drivers, features, ...) for Linux into this AMD Ryzen 5000 series cpu's, the "average" user is looking at maybe November 2021 or later for Linux to incorporate full performance advantage of these 5000 series ryzen cpu's, ..., whereas MS Windows users will have all these issues sorted out 8 months earlier.

But, of course by then, Zen 4 will be upon us, ...., and Linux will be adivised to rinse n repeat n wait, again.
But that's ok, 'cause when it happens again, and again, and ..., Linux will always blame the private-corporate, patent-pending, copyright, ..., world for letting Linux users down, blah blah ..., and they'll BOTH be correct.

[Drago]

Can't znver3 be added to a minor release of GCC if it's not too much of a change? That way it shouldn't take that long to go.

For us Slavics, it would be better if they called it "zver3", where "zver" means a Beast in Slavic languages.

[geearf]

Can't znver3 be added to a minor release of GCC if it's not too much of a change? That way it shouldn't take that long to go.

[skeevy420]

-march=XYZ will imply -mtune=XYZ

Unless you're using -march=native on an unknown architecture where it'll enable what optimizations it can detect, set -mtune=generic, and leave you with binary that should run everywhere and use optimizations if they're available.

[oleid]

If I understand compiler's optimization flags correctly, -march=native would use all instructions supported by the current processor, and -mtune=... will use micro-arch specific instruction scheduler.
-march doesn't need any change, but -mtune=, maybe?

-march=XYZ will imply -mtune=XYZ

[zxy_thf]

iirc -mtune is implied by -march, which makes sense.

Yeah you're right. I checked the manual and it seems there is no easy way to enable all extensions without micro-arch specific scheduler. (One can surely pass tons of -mxxxx, but I won't call that "easy way")

[AsuMagic]

If I understand compiler's optimization flags correctly, -march=native would use all instructions supported by the current processor, and -mtune=... will use micro-arch specific instruction scheduler.
-march doesn't need any change, but -mtune=, maybe?

iirc -mtune is implied by -march, which makes sense.

[shmerl]

Who came up with names like znver2, znver3 instead of using zen2, zen3 etc.?

[zxy_thf]

Probably znver2 will do just fine. I'm wondering, though, what -march=native would do.

If I understand compiler's optimization flags correctly, -march=native would use all instructions supported by the current processor, and -mtune=... will use micro-arch specific instruction scheduler.
-march doesn't need any change, but -mtune=, maybe?

[CochainComplex]

znver2 might be really sufficent up to now - it seems that zen 3 is a highly opzimized and almost completly restructured zen 2 so afaik instructionset etc is the same.
sry german:
https://www.computerbase.de/2020-10/...-ankuendigung/