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core(ocl): options to control buffer access flags

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- control using of clEnqueueMapBuffer or clEnqueueReadBuffer[Rect]
- added benchmarks with OpenCL buffer access use cases
This commit is contained in:
Alexander Alekhin
2020-04-02 10:10:57 +00:00
parent f15e885baf
commit 54063c40de
2 changed files with 155 additions and 1 deletions
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modules/core/src/ocl.cpp
+20 -1
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@@ -4607,6 +4607,17 @@ public:
return u;
}
static bool isOpenCLMapForced() // force clEnqueueMapBuffer / clEnqueueUnmapMemObject OpenCL API
{
static bool value = cv::utils::getConfigurationParameterBool("OPENCV_OPENCL_BUFFER_FORCE_MAPPING", false);
return value;
}
static bool isOpenCLCopyingForced() // force clEnqueueReadBuffer[Rect] / clEnqueueWriteBuffer[Rect] OpenCL API
{
static bool value = cv::utils::getConfigurationParameterBool("OPENCV_OPENCL_BUFFER_FORCE_COPYING", false);
return value;
}
void getBestFlags(const Context& ctx, int /*flags*/, UMatUsageFlags usageFlags, int& createFlags, int& flags0) const
{
const Device& dev = ctx.device(0);
@@ -4614,7 +4625,15 @@ public:
if ((usageFlags & USAGE_ALLOCATE_HOST_MEMORY) != 0)
createFlags |= CL_MEM_ALLOC_HOST_PTR;
if( dev.hostUnifiedMemory() )
if (!isOpenCLCopyingForced() &&
(isOpenCLMapForced() ||
(dev.hostUnifiedMemory()
#ifndef __APPLE__
|| dev.isIntel()
#endif
)
)
)
flags0 = 0;
else
flags0 = UMatData::COPY_ON_MAP;