Re: [RFC PATCH v2 00/30] 1GB PUD THP support on x86_64

[David Hildenbrand]

>> I think gigantic pages are a sparse resource. Only selected applications
>> *really* depend on them and benefit from them. Let these special
>> applications handle it explicitly.
>>
>> Can we have a summary of use cases that would really benefit from this
>> change?
> 
> For large machine learning applications, 1GB pages give good performance boost[2].
> NVIDIA DGX A100 box now has 1TB memory, which means 1GB pages are not
> that sparse in GPU-equipped infrastructure[3].

Well, they *are* sparse and there are absolutely no grantees until you
reserve them via CMA, which is just plain ugly IMHO.

In the same setup, you can most probably use hugetlbfs and achieve a
similar result. Not saying it is very user-friendly.

-- 
Thanks,

David / dhildenb