[Question]Can someone help me explain the GPU allocation algorithm under the besteffort strategy?

[gcx-17211270]

go-gpuallocator/gpuallocator/besteffort_policy.go

Line 33 in 12c3885

// Such a solution is necessary in the general case because of the

The Allocate method's comment describes: "it looks for a solution that maximizes the total score when dividing up all available GPUs on the node into sets of size 'size' and then summing their individual scores."

It further explains: "Such a solution is necessary in the general case because of the non-hierarchical nature of the various links that influence the score calculated for each pair of GPUs."

However, I still don't understand why this is necessary. Can someone provide a detailed explanation or give an example to illustrate why failing to do so would result in a suboptimal outcome?