P4 to Git Change 1202323 by xcui@merged_opencl_jxcwin on 2015/10/21 17:01:58

SWDEV-79347 - added a env variable to change the size of the minimum system memory requirement to avoid downgrade OCL support. The default is 2, which means 2GB

	code review:
	http://ocltc.amd.com/reviews/r/8754/

	precheckin:
	http://ocltc.amd.com:8111/viewModification.html?modId=60516&personal=true&buildTypeId=&tab=vcsModificationBuilds&show_all_builds=true

Affected files ...

... //depot/stg/opencl/drivers/opencl/runtime/device/cpu/cpudevice.cpp#278 edit
... //depot/stg/opencl/drivers/opencl/runtime/device/gpu/gpudevice.cpp#532 edit
... //depot/stg/opencl/drivers/opencl/runtime/utils/flags.hpp#243 edit


[ROCm/clr commit: 0bb91b89ba]

projects/clr/rocclr/runtime/device/cpu/cpudevice.cpp

@@ -5,6 +5,7 @@
 #include "device/cpu/cpudevice.hpp"
 #include "device/cpu/cpuprogram.hpp"
 #include "utils/versions.hpp"
+#include "utils/flags.hpp"
 
 #include "amdocl/cl_common.hpp"
 
@@ -236,7 +237,7 @@ Device::init()
         (uintptr_t) std::min(statex.ullTotalPageFile, statex.ullTotalVirtual);
 #endif
     //disable CPU device if system memory is equal to or less than 2GB
-    if (info.globalMemSize_ <= 2 * Gi) {
+    if (info.globalMemSize_ <= OCL_SYSMEM_REQUIREMENT * Gi) {
         return true;
     }
 

projects/clr/rocclr/runtime/device/gpu/gpudevice.cpp

@@ -763,7 +763,7 @@ Device::create(CALuint ordinal, CALuint numOfDevices)
     appProfile_.init();
 
     bool smallMemSystem = false;
-    if (amd::Os::hostTotalPhysicalMemory() < 2 * Gi) {
+    if (amd::Os::hostTotalPhysicalMemory() < OCL_SYSMEM_REQUIREMENT * Gi) {
         smallMemSystem = true;
     }
 

projects/clr/rocclr/runtime/utils/flags.hpp

@@ -166,6 +166,8 @@ release(int, AMD_GPU_FORCE_SINGLE_FP_DENORM, -1,                              \
         "Force denorm for single precision: -1 - don't force, 0 - disable, 1 - enable")                \
 debug(bool, OCL_FORCE_CPU_SVM, false,                                         \
         "force svm support for CPU")                                          \
+debug(uint, OCL_SYSMEM_REQUIREMENT, 2,                                        \
+        "Use flag to change the minimum requirement of system memory not to downgrade")        \
 debug(bool, GPU_ENABLE_HW_DEBUG, false,                                       \
         "Enable HW DEBUG for GPU")                                            \
 release(uint, GPU_WAVES_PER_SIMD, 0,                                          \