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Map/Unmap constant buffers instead of using UpdateSubResource

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(XB1) Drops GPU Busy % on spiral from 65% to 20%

(PC) Drops bgfx::d3d11::RendererContextD3D11::commitShaderConstants
CPU usage by 95% (11.21%->0.66%)

(PC) Overall decreases bgfx::d3d11::RenderContextD3D11::submit CPU
usage by another 34% (27.18%->17.90%)
This commit is contained in:
Matthew Endsley 2015-01-06 11:23:50 +00:00
parent 9e8652f661
commit b124334343
1 changed files with 84 additions and 2 deletions
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86
src/renderer_d3d11.cpp
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@ -8,6 +8,10 @@
#if BGFX_CONFIG_RENDERER_DIRECT3D11 #if BGFX_CONFIG_RENDERER_DIRECT3D11
# include "renderer_d3d11.h" # include "renderer_d3d11.h"
# if !defined(BGFX_D3D11_MAP_CONSTANT_BUFFERS)
# define BGFX_D3D11_MAP_CONSTANT_BUFFERS 0
# endif
namespace bgfx { namespace d3d11 namespace bgfx { namespace d3d11
{ {
static wchar_t s_viewNameW[BGFX_CONFIG_MAX_VIEWS][BGFX_CONFIG_MAX_VIEW_NAME]; static wchar_t s_viewNameW[BGFX_CONFIG_MAX_VIEWS][BGFX_CONFIG_MAX_VIEW_NAME];
@ -462,8 +466,13 @@ namespace bgfx { namespace d3d11
, m_flags(BGFX_RESET_NONE) , m_flags(BGFX_RESET_NONE)
, m_maxAnisotropy(1) , m_maxAnisotropy(1)
, m_currentProgram(NULL) , m_currentProgram(NULL)
#if BGFX_D3D11_MAP_CONSTANT_BUFFERS
, m_vsScratch(NULL)
, m_fsScratch(NULL)
#else
, m_vsChanges(0) , m_vsChanges(0)
, m_fsChanges(0) , m_fsChanges(0)
#endif // BGFX_D3D11_MAP_CONSTANT_BUFFERS
, m_rtMsaa(false) , m_rtMsaa(false)
, m_ovrRtv(NULL) , m_ovrRtv(NULL)
, m_ovrDsv(NULL) , m_ovrDsv(NULL)
@ -1440,6 +1449,8 @@ BX_PRAGMA_DIAGNOSTIC_POP();
float proj[16]; float proj[16];
bx::mtxOrtho(proj, 0.0f, (float)width, (float)height, 0.0f, 0.0f, 1000.0f); bx::mtxOrtho(proj, 0.0f, (float)width, (float)height, 0.0f, 0.0f, 1000.0f);
prepareShaderConstants();
PredefinedUniform& predefined = program.m_predefined[0]; PredefinedUniform& predefined = program.m_predefined[0];
uint8_t flags = predefined.m_type; uint8_t flags = predefined.m_type;
setShaderUniform(flags, predefined.m_loc, proj, 4); setShaderUniform(flags, predefined.m_loc, proj, 4);
@ -1736,12 +1747,16 @@ BX_PRAGMA_DIAGNOSTIC_POP();
if (_flags&BGFX_UNIFORM_FRAGMENTBIT) if (_flags&BGFX_UNIFORM_FRAGMENTBIT)
{ {
memcpy(&m_fsScratch[_regIndex], _val, _numRegs*16); memcpy(&m_fsScratch[_regIndex], _val, _numRegs*16);
#if !BGFX_D3D11_MAP_CONSTANT_BUFFERS
m_fsChanges += _numRegs; m_fsChanges += _numRegs;
#endif
} }
else else
{ {
memcpy(&m_vsScratch[_regIndex], _val, _numRegs*16); memcpy(&m_vsScratch[_regIndex], _val, _numRegs*16);
#if !BGFX_D3D11_MAP_CONSTANT_BUFFERS
m_vsChanges += _numRegs; m_vsChanges += _numRegs;
#endif
} }
} }
@ -1755,8 +1770,37 @@ BX_PRAGMA_DIAGNOSTIC_POP();
setShaderUniform(_flags, _regIndex, _val, _numRegs); setShaderUniform(_flags, _regIndex, _val, _numRegs);
} }
void prepareShaderConstants()
{
#if BGFX_D3D11_MAP_CONSTANT_BUFFERS
if (NULL != m_currentProgram->m_vsh->m_buffer)
{
D3D11_MAPPED_SUBRESOURCE mapped;
DX_CHECK(m_deviceCtx->Map(m_currentProgram->m_vsh->m_buffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mapped));
m_vsScratch = (uint8_t*)mapped.pData;
}
if (NULL != m_currentProgram->m_fsh->m_buffer)
{
D3D11_MAPPED_SUBRESOURCE mapped;
DX_CHECK(m_deviceCtx->Map(m_currentProgram->m_fsh->m_buffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mapped));
m_fsScratch = (uint8_t*)mapped.pData;
}
#endif // BGFX_D3D11_MAP_CONSTANT_BUFFERS
}
void commitShaderConstants() void commitShaderConstants()
{ {
#if BGFX_D3D11_MAP_CONSTANT_BUFFERS
if (NULL != m_vsScratch)
{
m_deviceCtx->Unmap(m_currentProgram->m_vsh->m_buffer, 0);
}
if (NULL != m_fsScratch)
{
m_deviceCtx->Unmap(m_currentProgram->m_fsh->m_buffer, 0);
}
m_vsScratch = m_fsScratch = 0;
#else
if (0 < m_vsChanges) if (0 < m_vsChanges)
{ {
if (NULL != m_currentProgram->m_vsh->m_buffer) if (NULL != m_currentProgram->m_vsh->m_buffer)
@ -1776,6 +1820,7 @@ BX_PRAGMA_DIAGNOSTIC_POP();
m_fsChanges = 0; m_fsChanges = 0;
} }
#endif // BGFX_D3D11_MAP_CONSTANT_BUFFERS
} }
void setFrameBuffer(FrameBufferHandle _fbh, bool _msaa = true) void setFrameBuffer(FrameBufferHandle _fbh, bool _msaa = true)
@ -2518,6 +2563,12 @@ BX_PRAGMA_DIAGNOSTIC_POP();
deviceCtx->PSSetShader(fsh->m_pixelShader, NULL, 0); deviceCtx->PSSetShader(fsh->m_pixelShader, NULL, 0);
deviceCtx->PSSetConstantBuffers(0, 1, &fsh->m_buffer); deviceCtx->PSSetConstantBuffers(0, 1, &fsh->m_buffer);
#if BGFX_D3D11_MAP_CONSTANT_BUFFERS
D3D11_MAPPED_SUBRESOURCE mapped;
DX_CHECK(deviceCtx->Map(fsh->m_buffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mapped));
void* fsScratch = mapped.pData;
#endif // BGFX_D3D11_MAP_CONSTANT_BUFFERS
if (BGFX_CLEAR_COLOR_USE_PALETTE & _clear.m_flags) if (BGFX_CLEAR_COLOR_USE_PALETTE & _clear.m_flags)
{ {
float mrtClear[BGFX_CONFIG_MAX_FRAME_BUFFER_ATTACHMENTS][4]; float mrtClear[BGFX_CONFIG_MAX_FRAME_BUFFER_ATTACHMENTS][4];
@ -2527,7 +2578,11 @@ BX_PRAGMA_DIAGNOSTIC_POP();
memcpy(mrtClear[ii], _palette[index], 16); memcpy(mrtClear[ii], _palette[index], 16);
} }
#if BGFX_D3D11_MAP_CONSTANT_BUFFERS
memcpy(fsScratch, mrtClear, sizeof(mrtClear));
#else
deviceCtx->UpdateSubresource(fsh->m_buffer, 0, 0, mrtClear, 0, 0); deviceCtx->UpdateSubresource(fsh->m_buffer, 0, 0, mrtClear, 0, 0);
#endif // BGFX_D3D11_MAP_CONSTANT_BUFFERS
} }
else else
{ {
@ -2538,8 +2593,20 @@ BX_PRAGMA_DIAGNOSTIC_POP();
_clear.m_index[2]*1.0f/255.0f, _clear.m_index[2]*1.0f/255.0f,
_clear.m_index[3]*1.0f/255.0f, _clear.m_index[3]*1.0f/255.0f,
}; };
#if BGFX_D3D11_MAP_CONSTANT_BUFFERS
memcpy(fsScratch, rgba, sizeof(rgba));
#else
deviceCtx->UpdateSubresource(fsh->m_buffer, 0, 0, rgba, 0, 0); deviceCtx->UpdateSubresource(fsh->m_buffer, 0, 0, rgba, 0, 0);
#endif // BGFX_D3D11_MAP_CONSTANT_BUFFERS
} }
#if BGFX_D3D11_MAP_CONSTANT_BUFFERS
if (NULL != fsScratch)
{
deviceCtx->Unmap(fsh->m_buffer, 0);
}
#endif // BGFX_D3D11_MAP_CONSTANT_BUFFERS
} }
else else
{ {
@ -2660,11 +2727,15 @@ BX_PRAGMA_DIAGNOSTIC_POP();
ProgramD3D11* m_currentProgram; ProgramD3D11* m_currentProgram;
#if BGFX_D3D11_MAP_CONSTANT_BUFFERS
uint8_t* m_vsScratch;
uint8_t* m_fsScratch;
#else
uint8_t m_vsScratch[64<<10]; uint8_t m_vsScratch[64<<10];
uint8_t m_fsScratch[64<<10]; uint8_t m_fsScratch[64<<10];
uint32_t m_vsChanges; uint32_t m_vsChanges;
uint32_t m_fsChanges; uint32_t m_fsChanges;
#endif // BGFX_D3D11_MAP_CONSTANT_BUFFERS
FrameBufferHandle m_fbh; FrameBufferHandle m_fbh;
bool m_rtMsaa; bool m_rtMsaa;
@ -3057,9 +3128,14 @@ BX_PRAGMA_DIAGNOSTIC_POP();
{ {
D3D11_BUFFER_DESC desc; D3D11_BUFFER_DESC desc;
desc.ByteWidth = (size + 0xf) & ~0xf; desc.ByteWidth = (size + 0xf) & ~0xf;
#if BGFX_D3D11_MAP_CONSTANT_BUFFERS
desc.Usage = D3D11_USAGE_DYNAMIC;
desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
#else
desc.Usage = D3D11_USAGE_DEFAULT; desc.Usage = D3D11_USAGE_DEFAULT;
desc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
desc.CPUAccessFlags = 0; desc.CPUAccessFlags = 0;
#endif // BGFX_D3D11_MAP_CONSTANT_BUFFERS
desc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
desc.MiscFlags = 0; desc.MiscFlags = 0;
desc.StructureByteStride = 0; desc.StructureByteStride = 0;
DX_CHECK(s_renderD3D11->m_device->CreateBuffer(&desc, NULL, &m_buffer) ); DX_CHECK(s_renderD3D11->m_device->CreateBuffer(&desc, NULL, &m_buffer) );
@ -4108,6 +4184,12 @@ BX_PRAGMA_DIAGNOSTIC_POP();
{ {
ProgramD3D11& program = m_program[programIdx]; ProgramD3D11& program = m_program[programIdx];
#if BGFX_D3D11_MAP_CONSTANT_BUFFERS
if (constantsChanged || 0 != program.m_numPredefined)
{
prepareShaderConstants();
}
#endif // BGFX_D3D11_MAP_CONSTANT_BUFFERS
if (constantsChanged) if (constantsChanged)
{ {
ConstantBuffer* vcb = program.m_vsh->m_constantBuffer; ConstantBuffer* vcb = program.m_vsh->m_constantBuffer;