Hello, I'm trying CodeXL 1.5. I like it very much.
There's a textbox in the GCN analysis panel (wow!) called "Dynamic LDS usage".
The help reads:
The LDS is constructed from the static & dynamic values. The dynamic value can be defined by the user to and its possible effect on the constraint can be immediately viewed. LDS is also affected by local workgroups size, so the values can be changed in order to see the impact on the performance of the kernel.
I always considered LDS very static in nature. I allocated it in blocks and managed it very carefully.