Actualizar 'Performance Analysis setup'

Performance-Analysis-setup.md

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 # Performance with Vtune:
 
+## Use Vtunes for Hotspot profiling:
+
+1. With GUI:
+    
+    From terminal open with vtune-gui and open your project for analysis.
+    At first this will generate a flat profile where you can choose the hotspot options.
+    
+2. In Terminal:
+
+    from terminal use the command:
+    
+        vtunne -collect hotspots ./<source-excecutable>
+        
+        
+# Performance with Gprof:
+
+## Use Gprof for Flat and Function Call Graph profiling:
+
+###     SETUP
+
+        Compile and build the project in terminal with this line of code before make:
+        
+
+            cmake -DCMAKE_CXX_FLAGS=-pg -DCMAKE_EXE_LINKER_FLAGS=-pg -DCMAKE_SHARED_LINKER_FLAGS=-pg <SOURCE_DIR>
+            
+
+            The directory should be where you have the Cmake file for the project.
+
+###     ANALYSIS
+
+        After this, this will generate a gmon.out file:
+
+            Go to the directory where gmon.out file is located and analyse with:
+            
+
+                gprof -p ./<excecutable>   >[outputfilename with directory] 
+                
+
+            for a flat profiling of times.
+
+            And for a call graph:
+            
+
+                gprof -q ./<excecutable>   >[outputfilename with directory]
+                
+                
+### Visualisation:
+
+        The output files can be opened with any text editor.
+                
+                
+# Performance with Valgrind:
+
+## Use Gprof for Cache and Call Graph analysis:
+
+###     SETUP
+
+
+        Build with RelWithDebInfo option so that SIGILL does not appear (illegal opcode)
+        
+        
+###     ANALYSIS
+
+
+        Go to the build you want to analyse with cd <source-of-build>
+
+
+        Cache Analysis:
+        
+
+            valgrind --tool=cachegrind ./bin/<excecutable>
+            
+
+            this will generate a cachegrind.out.<id> file in the directory where you analysed, which you can annotate using.
+            
+
+        Cache Analysis Presentation:
+        
+
+            cg_annotate cachegrind.out.<id>
+            
+
+        Function Call Analysis:
+        
+
+            valgrind --tool=callgrind ./bin/<excecutable>
+            
+
+            this will generate a cachegrind.out.<id> file in the directory where you analysed, which you can annotate using.
+            
+
+        Cache Analysis Presentation:
+        
+
+            cg_annotate cachegrind.out.<id>
+            
+### GUI Presentation:
+
+
+        All the .out files can be presented through KCachegrind. Open it from the GUI. Errors may appear if you want to open them directly from terminal.
+
+  
+
+
+