CODEWITHSUNDEEP
vulkan
nikitablack
nikitablack

Reputation: 4663

What's the difference between local device memory and dedicated memory?

In the specification, I saw several extensions for work with a so-called dedicated memory. My understanding is that this is the on-chip memory. But how then it differs from local device memory?

Upvotes: 1

Views: 587

Answers (1)

Ekzuzy
Ekzuzy

Reputation: 3447

In the documentation of the VK_KHR_dedicated_allocation extension we can read:

This extension enables resources to be bound to a dedicated allocation, rather than suballocated. For any particular resource, applications can query whether a dedicated allocation is recommended, in which case using a dedicated allocation may improve the performance of access to that resource.

So I think the difference is not between dedicated memory and device-local memory but between dedicated allocation and normal/general suballocation. But where is this memory object allocated from that's another story. And extension allows to check if dedicated allocation is suggested or if given resource can use part of (can suballocate from) a larger memory.

Upvotes: 2

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