1 files changed, 19 insertions, 1 deletions
diff --git a/src/core/CL/CLKernelLibrary.cpp b/src/core/CL/CLKernelLibrary.cpp
index b5b331b1c1..019f3ea132 100644
--- a/src/core/CL/CLKernelLibrary.cpp
+++ b/src/core/CL/CLKernelLibrary.cpp
@@ -27,6 +27,7 @@
 #include "arm_compute/core/Error.h"
 #include "arm_compute/core/Utils.h"
 
+#include <algorithm>
 #include <fstream>
 #include <iostream>
 #include <utility>
@@ -524,7 +525,7 @@ const std::map<std::string, std::string> CLKernelLibrary::_program_source_map =
 };
 
 CLKernelLibrary::CLKernelLibrary()
-    : _context(), _device(), _kernel_path("."), _programs_map(), _built_programs_map()
+    : _context(), _device(), _kernel_path("."), _programs_map(), _built_programs_map(), _max_workgroup_size(0)
 {
 }
 
@@ -663,3 +664,20 @@ std::string CLKernelLibrary::get_program_source(const std::string &program_name)
 
     return program_source_it->second;
 }
+
+size_t CLKernelLibrary::max_local_workgroup_size()
+{
+    if(_max_workgroup_size == 0)
+    {
+        size_t err = clGetDeviceInfo(_device.get(), CL_DEVICE_MAX_WORK_GROUP_SIZE, sizeof(size_t), &_max_workgroup_size, nullptr);
+        ARM_COMPUTE_ERROR_ON_MSG(err != 0, "clGetDeviceInfo failed to return valid information");
+        ARM_COMPUTE_UNUSED(err);
+    }
+
+    return _max_workgroup_size;
+}
+
+cl::NDRange CLKernelLibrary::default_ndrange()
+{
+    return cl::NDRange(std::min<size_t>(_max_workgroup_size, 128u), 1);
+}