每次写入缓冲区时都应该调用 `vkMapMemory` 吗? [英] Should I call `vkMapMemory` each time I write to a buffer?

问题描述

使用单个 vkMapMemory、每次写入使用一个 memset 和单个 vkUnmapMemory 与使用单个 vkUnmapMemory 相比有什么好处吗?vkMapMemory、memset 和 vkUnmapMemory 用于每次写入缓冲区?

解决方案

是的，只映射一次是有益的.vkMapMemory 可能需要做一些系统调用，所以它不是免费的.

权威报价，例如https://developer.samsung.com/game/usage#buffermanagement::><块引用>

应避免频繁的 Map/Unmap 调用.

Are there any benefits to using a single vkMapMemory, a memsets for each write, and a single vkUnmapMemory as opposed to using a vkMapMemory, memset, and vkUnmapMemory for each write to a buffer?

解决方案

Yes, it is beneficial to map only once. vkMapMemory likely needs to do some system calls, so it is not free.

Authoritative quote, e.g. https://developer.samsung.com/game/usage#buffermanagement:

Frequent Map/Unmap calls should be avoided.

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