OpenGL 无绑定纹理函数 glMakeTextureHandleNonResident 实际上做了什么？
What does OpenGL Bindless Texture function glMakeTextureHandleNonResident ACTUALLY do?
我有一个测试无绑定纹理的工作原型。我有一台相机可以平移超过 6 GB 的纹理，而我只有 2 GB 的 VRAM。我有一个内部平截头体，用于获取视口中的对象列表以进行渲染，还有一个外部平截头体，用于排队（使驻留）即将渲染的纹理，所有其他纹理，如果它们是常驻的, 使用函数 glMakeTextureHandleNonResident 使之非常驻。
程序运行，但 gpu 的 VRAM 表现得好像它有一个 GC 步骤，它以随机时间间隔清除 VRAM。当它执行此操作时，我的渲染完全冻结，但随后跳到正确的帧，最终恢复到 60 FPS。我很好奇 glMakeTextureHandleNonResident 实际上并没有将纹理从它调用的 VRAM "when" 中拉出来。有谁确切地知道 GPU 对该调用做了什么？
GPU：英伟达 750GT M
Bindless 纹理本质上在硬件上公开了一个转换 table，这样您就可以在着色器中使用任意整数（句柄）而不是 GL 的传统绑定到图像单元机制来引用纹理；它们不允许您直接控制 GPU 内存驻留。
Sparse textures 实际上听起来更像你想要的。请注意，这两个东西可以一起使用。
使 句柄 非常驻并不一定会从 VRAM 中逐出纹理内存，它只是从所述翻译中删除句柄 table。纹理内存的逐出可以推迟到将来某个时间，正如您所发现的那样。
您可以在 GL_ARB_bindless_texture 的扩展规范中阅读更多相关信息。
void glMakeImageHandleResidentARB（GLuint64 句柄，GLenum 访问）：
"When an image handle is resident, the texture it references is not necessarily considered resident for the purposes of the AreTexturesResident command."
问题：
(18) Texture and image handles may be made resident or non-resident. How
does handle residency interact with texture residency queries from
OpenGL 1.1 (glAreTexturesResident or GL_TEXTURE_RESIDENT)?
RESOLVED:
The residency state for texture and image handles in this
extension is completely independent from OpenGL 1.1's GL_TEXTURE_RESIDENT
query. Residency for texture handles is a function of whether the
glMakeTextureHandleResidentARB has been called for the handle. OpenGL 1.1
residency is typically a function of whether the texture data are
resident in GPU-accessible memory.
When a texture handle is not made resident, the texture that it refers
to may or may not be stored in GPU-accessible memory. The
GL_TEXTURE_RESIDENT query may return GL_TRUE in this case. However, it does
not guarantee that the texture handle may be used safely.
When a texture handle is made resident, the texture that it refers to is
also considered resident for the purposes of the old GL_TEXTURE_RESIDENT
query. When an image handle is resident, the texture that it refers to
may or may not be considered resident for the query -- the resident
image handle may refer only to a single layer of a single mipmap level
of the full texture.
我有一个测试无绑定纹理的工作原型。我有一台相机可以平移超过 6 GB 的纹理，而我只有 2 GB 的 VRAM。我有一个内部平截头体，用于获取视口中的对象列表以进行渲染，还有一个外部平截头体，用于排队（使驻留）即将渲染的纹理，所有其他纹理，如果它们是常驻的, 使用函数 glMakeTextureHandleNonResident 使之非常驻。
程序运行，但 gpu 的 VRAM 表现得好像它有一个 GC 步骤，它以随机时间间隔清除 VRAM。当它执行此操作时，我的渲染完全冻结，但随后跳到正确的帧，最终恢复到 60 FPS。我很好奇 glMakeTextureHandleNonResident 实际上并没有将纹理从它调用的 VRAM "when" 中拉出来。有谁确切地知道 GPU 对该调用做了什么？
GPU：英伟达 750GT M
Bindless 纹理本质上在硬件上公开了一个转换 table，这样您就可以在着色器中使用任意整数（句柄）而不是 GL 的传统绑定到图像单元机制来引用纹理；它们不允许您直接控制 GPU 内存驻留。
Sparse textures 实际上听起来更像你想要的。请注意，这两个东西可以一起使用。
使 句柄 非常驻并不一定会从 VRAM 中逐出纹理内存，它只是从所述翻译中删除句柄 table。纹理内存的逐出可以推迟到将来某个时间，正如您所发现的那样。
您可以在 GL_ARB_bindless_texture 的扩展规范中阅读更多相关信息。
void glMakeImageHandleResidentARB（GLuint64 句柄，GLenum 访问）：
"When an image handle is resident, the texture it references is not necessarily considered resident for the purposes of the AreTexturesResident command."
问题：
(18) Texture and image handles may be made resident or non-resident. How does handle residency interact with texture residency queries from OpenGL 1.1 (
glAreTexturesResidentorGL_TEXTURE_RESIDENT)?RESOLVED:
The residency state for texture and image handles in this extension is completely independent from OpenGL 1.1's
GL_TEXTURE_RESIDENTquery. Residency for texture handles is a function of whether theglMakeTextureHandleResidentARBhas been called for the handle. OpenGL 1.1 residency is typically a function of whether the texture data are resident in GPU-accessible memory.When a texture handle is not made resident, the texture that it refers to may or may not be stored in GPU-accessible memory. The
GL_TEXTURE_RESIDENTquery may returnGL_TRUEin this case. However, it does not guarantee that the texture handle may be used safely.When a texture handle is made resident, the texture that it refers to is also considered resident for the purposes of the old
GL_TEXTURE_RESIDENTquery. When an image handle is resident, the texture that it refers to may or may not be considered resident for the query -- the resident image handle may refer only to a single layer of a single mipmap level of the full texture.