Glibc sysdeps: dl_platform detection effectively performs “cripple AMD”

Re:Glibc sysdeps: dl_platform detection effectively performs... by TomVDB on Sunday September 08, 2019 @08:10PM (#20914197)

How many AMD CPU configurations exist? Does a minimal effort require regression testing all of them? On how many benchmarks? How do you know that there aren’t untested potholes in AMD CPUs that you may not be aware of?

In the end, the result of this feature is a performance improvement for some and status quo (no perf regression) for everybody else. It’s a net benefit with no downside in absolute terms.

In addition, it provides a free roadmap for AMD or its users on how to get the same benefit as well.

The potential backlash of enabling this for AMD as well by somebody of Intel (“active sabotage!!!”) is much larger than this tempest in a teacup where AMD is currently missing out on something.

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Re:Glibc sysdeps: dl_platform detection effectively performs... by Dylan16807 on Sunday September 08, 2019 @09:56PM (#20914606)

The same benchmarks you used to justify adding it in the first place, on their current model and ideally a slightly older one, would be sufficient.

> The potential backlash of enabling this for AMD as well by somebody of Intel (“active sabotage!!!”) is much larger than this tempest in a teacup where AMD is currently missing out on something.

I disagree.

[ Parent | on HN ]