Julian BoyBaykiller

Diffs are based on 29,389 contexts (14 MinOpts, 29,375 FullOpts).

Overall (-120 bytes)

Collection	Base size (bytes)	Diff size (bytes)	PerfScore in Diffs
realworld.run.windows.x64.checked.mch	11,555,829	-120	-0.41%

Diffs are based on 2,490,528 contexts (966,403 MinOpts, 1,524,125 FullOpts).

MISSED contexts: 3 (0.00%)

Overall (-6,312 bytes)

|Collection|Base size (bytes)|Diff size (bytes)|PerfScore in Diffs

Diffs are based on 2,490,528 contexts (966,403 MinOpts, 1,524,125 FullOpts).

MISSED contexts: 3 (0.00%)

Overall (-7,470 bytes)

|Collection|Base size (bytes)|Diff size (bytes)|PerfScore in Diffs

Diffs are based on 2,542,063 contexts (973,272 MinOpts, 1,568,791 FullOpts).

Overall (+9,918 bytes)

Collection	Base size (bytes)	Diff size (bytes)	PerfScore in Diffs
aspnet2.run.windows.x64.checked.mch	18,909,649	+119	+0.11%

First, I want to thank you for making the effort of implementing Mesh Shaders in OpenGL!

When compiling a mesh or task shader that enables GL_ARB_bindless_texture I get this compiler output:

ERROR: 0:3: 'GL_ARB_bindless_texture' : not allowed when using generating SPIR-V codes
ERROR: 0:3: '#extension' : extra tokens -- expected newline
ERROR: 0:3: '' : compilation terminated
ERROR: 3 compilation errors.  No code generated.

Reproducible:

Currently, having many bindless resident textures can cause a big performance overhead in the OpenGL driver. Just to give you a rough idea of scale, these are the numbers I am getting in my renderer:

Count	Time
0	0.5ms
1_000	0.56ms
2_000	7.8ms
4_000	16.6ms
8_000	58.8ms

I've noticed that buffers allocated with GL_MAP_WRITE_BIT or GL_MAP_READ_BIT end up in HOST memory. Example:

uint32_t size = 1 << 22; // 4MiB
uint32_t buf;
glCreateBuffers(1, &buf);
glNamedBufferStorage(buf, size, nullptr, GL_MAP_PERSISTENT_BIT | GL_MAP_WRITE_BIT);
//glMapNamedBufferRange(buf, 0, size, GL_MAP_PERSISTENT_BIT | GL_MAP_WRITE_BIT); // not needed to reproduce

It happens with any other additional combination of flags too. What's interersting is that the memory report of a RX 5700 XT

Running the following code throws an exception (when creating the 1536th texture) from inside the driver: Exception thrown at 0x00007FFC07BFDB20 (atio6axx.dll) in MyProgram.exe: 0xC0000005: Access violation reading location 0x0000000000000008.

I am simply creating a texture making it bindless and deleting it again. If the texture is not made bindless it runs fine. Also putting glfwSwapBuffers always makes it run fine.

for (int i = 0; i < 1600; i++) {
    uint32_t test;
    glCreateTextures(GL_TEXTURE_2D, 1, &test);

	****** START compiling IDKEngine.Application:Unoptimized(int,int):int (MethodHash=a4b702e1)
	Generating code for Windows x64

	*************** JitOptRepeat enabled; repetition count: 3

	OPTIONS: compCodeOpt = BLENDED_CODE
	OPTIONS: compDbgCode = false
	OPTIONS: compDbgInfo = true
	OPTIONS: compDbgEnC = false
	OPTIONS: compProcedureSplitting = false

	****** START compiling Program.EntryPoint:GetTest(Program.EntryPoint+Vector2,int):float (MethodHash=2b4c0cab)
	Generating code for Windows x64
	OPTIONS: Tier-0 compilation (set DOTNET_TieredCompilation=0 to disable)
	OPTIONS: compCodeOpt = BLENDED_CODE
	OPTIONS: compDbgCode = false
	OPTIONS: compDbgInfo = true
	OPTIONS: compDbgEnC = false
	OPTIONS: compProcedureSplitting = false
	OPTIONS: compProcedureSplittingEH = false
	IL to import: