Amazon Reflects On The Great Year For DAMON In The Linux Kernel

[coder]

I only tested this on my laptop with Haswell based intel 4710MQ cpu (4 cores 8 threads) and with mitigations off. As said, the kernel team evaluation of DAMON has the following line in it:
DAMON is lightweight. It increases system memory usage by 0.39% and slows target workloads down by 1.16%.

and in the design documents it says:
The monitoring overhead of this mechanism will arbitrarily increase as the size of the target workload grows.

The phrase "target workload" jumps right out at me. This implies it shouldn't cause a 1.16% across-the-board slowdown.

So it is not unexpected that on relatively simple hardware such as laptops, running DAMON does indeed lead to noticeable effects. However, as it is developed by Amazon for their use on large datacenters and cloud services ...

You're jumping to conclusions, here. You might be right, but that's a pretty huge leap. Good data or a proper understanding is needed to close that gap.