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				@@ -232,7 +232,7 @@ 
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				    "outputs": [], 
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				    "source": [ 
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				     "#compile for Tesla GPU\n", 
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				-    "!cd ../../source_code/stdpar && nvc++ -std=c++17 -stdpar=gpu -o rdf rdf.cpp " 
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				+    "!cd ../../source_code/stdpar && nvc++ -std=c++17 -DUSE_COUNTING_ITERATIOR  -stdpar=gpu -o rdf rdf.cpp " 
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				    ] 
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				   }, 
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				   { 
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				@@ -284,7 +284,7 @@ 
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				     "\n", 
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				     "If you inspect the output of the profiler closer, you can see the usage of *Unified Memory* annotated with green rectangle which was explained in previous sections.\n", 
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				     "\n", 
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				-    "Moreover, if you compare the NVTX marker `Pair_Calculation` (from the NVTX row) in both multicore and GPU version, you can see how much improvement you achieved. In the *example screenshot*, we were able to reduce that range from 1.52 seconds to 225.8 mseconds.\n", 
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				+    "Moreover, if you compare the NVTX marker `Pair_Calculation` (from the NVTX row) in both multicore and GPU version, you can see how much improvement you achieved. In the *example screenshot*, we were able to reduce that range from 1.52 seconds to 188.4 mseconds.\n", 
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				     "\n", 
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				     "Feel free to checkout the [solution](../../source_code/stdpar/SOLUTION/rdf.cpp) to help you understand better or compare your implementation with the sample solution." 
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				    ] 
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