For a single thread acc if the WorkDiv number of threads per block is…

… more than one, throw a runtime error
alpaka-group · Sep 24, 2024 · 1bff084 · 1bff084
1 parent 4301981
commit 1bff084
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diff --git a/include/alpaka/acc/AccCpuOmp2Blocks.hpp b/include/alpaka/acc/AccCpuOmp2Blocks.hpp
@@ -189,6 +189,13 @@ namespace alpaka
                 TKernelFnObj const& kernelFnObj,
                 TArgs&&... args)
             {
+                if(workDiv.m_blockThreadExtent.prod() != static_cast<TIdx>(1u))
+                {
+                    throw std::runtime_error(
+                        "The given work division is not valid for a single thread Acc: "
+                        + getAccName<AccCpuOmp2Blocks<TDim, TIdx>>() + ". Threads per block should be 1!");
+                }
+
                 return TaskKernelCpuOmp2Blocks<TDim, TIdx, TKernelFnObj, TArgs...>(
                     workDiv,
                     kernelFnObj,

diff --git a/include/alpaka/acc/AccCpuSerial.hpp b/include/alpaka/acc/AccCpuSerial.hpp
@@ -182,6 +182,13 @@ namespace alpaka
                 TKernelFnObj const& kernelFnObj,
                 TArgs&&... args)
             {
+                if(workDiv.m_blockThreadExtent.prod() != static_cast<TIdx>(1u))
+                {
+                    throw std::runtime_error(
+                        "The given work division is not valid for a single thread Acc: "
+                        + getAccName<AccCpuSerial<TDim, TIdx>>() + ". Threads per block should be 1!");
+                }
+
                 return TaskKernelCpuSerial<TDim, TIdx, TKernelFnObj, TArgs...>(
                     workDiv,
                     kernelFnObj,

diff --git a/include/alpaka/acc/AccCpuTbbBlocks.hpp b/include/alpaka/acc/AccCpuTbbBlocks.hpp
@@ -183,6 +183,13 @@ namespace alpaka
                 TKernelFnObj const& kernelFnObj,
                 TArgs&&... args)
             {
+                if(workDiv.m_blockThreadExtent.prod() != static_cast<TIdx>(1u))
+                {
+                    throw std::runtime_error(
+                        "The given work division is not valid for a single thread Acc: "
+                        + getAccName<AccCpuTbbBlocks<TDim, TIdx>>() + ". Threads per block should be 1!");
+                }
+
                 return TaskKernelCpuTbbBlocks<TDim, TIdx, TKernelFnObj, TArgs...>(
                     workDiv,
                     kernelFnObj,