[CPU] Reorganize development documentation (#16708)

src/plugins/intel_cpu/docs/selective_build.md

@@ -0,0 +1,103 @@
+# Selective Build
+## Introduction
+Selective build or conditional compilation can significantly reduce OpenVINO™ binaries size by excluding unnecessary components for particular model's inference.
+
+## Workflow
+
+Onednn path in OpenVINO:
+
+    ./src/plugins/intel_cpu/thirdparty/onednn/
+
+The selective build carries on under the instruction of:
+
+    ./src/common/conditional_compilation/CMakeLists.txt
+
+### **First build**
+
+The first build collects the information and generate a CSV file indicating which components are going to be included and which are going to be excluded in the selected build.
+
+*   For the first build, config cmake with option "-DENABLE_PROFILING_ITT=ON -DSELECTIVE_BUILD=COLLECT"
+```
+cd ./build
+
+cmake .. \
+-DCMAKE_BUILD_TYPE=Release \
+-DCMAKE_BUILD_TYPE=Release \
+-DENABLE_CPU_DEBUG_CAPS=ON \
+-DENABLE_PROFILING_ITT=ON \
+-DSELECTIVE_BUILD=COLLECT \
+-DCMAKE_INSTALL_PREFIX=`pwd`/install \
+-DCMAKE_INSTALL_RPATH=`pwd`/install/runtime/3rdparty/tbb/lib:`pwd`/install/runtime/lib/intel64
+
+cmake --build . --config Release -j 8
+```
+
+
+Generate statistics file (CSV): 
+*   Need to build manually to get libIntelSEAPI.so with the following step first.
+```
+# in ./build
+cd ./thirdparty/itt_collector && make
+```
+*   Then generate statistics file (in .csv format).
+```
+cd ../../../bin/intel64/Release/
+
+python ../../../thirdparty/itt_collector/runtool/sea_runtool.py \
+--bindir ./lib -o models_statistics_dir ! \
+./benchmark_app -niter 1 -nireq 1 \
+-m <model_path>
+```
+
+
+### **Second build**
+
+The second build takes in the information in the statistics file and only build the components mentioned in the CSV file.
+
+The generated CSV file could be found in folder:
+
+    openvino/bin/intel64/Release/
+
+This time, config cmake with option "-DSELECTIVE_BUILD=ON"
+
+```
+cd ../../../build
+
+cmake .. \
+-DCMAKE_BUILD_TYPE=Release \
+-DENABLE_CPU_DEBUG_CAPS=ON \
+-DENABLE_DEBUG_CAPS=ON \
+-DSELECTIVE_BUILD=ON \
+-DSELECTIVE_BUILD_STAT=<CSV_PATH> \
+-DPYTHON_EXECUTABLE=/usr/bin/python3.7 \
+-DCMAKE_INSTALL_PREFIX=`pwd`/install \
+-DCMAKE_INSTALL_RPATH=`pwd`/install/runtime/3rdparty/tbb/lib:`pwd`/install/runtime/lib/intel64
+
+cmake --build . --config Release -j 8
+```
+As shown in 
+
+    ./src/common/conditional_compilation/CMakeLists.txt
+    
+CSV file works as a SELECTIVE_BUILD_STAT and is first interpreted into a c++ head file:
+
+    ./build/src/common/conditional_compilation/conditional_compilation_gen.h
+
+It is generated by 'ccheader.py' and can indicate if selective build analyze process (first build) works correctly.
+
+
+### **Test selective compile with benchmark**
+```
+cd ./bin/intel64/Release
+
+./benchmark_app -niter 1 -nireq 1 \
+-m <model_path> -d CPU 
+```
+
+## Reference 
+https://github.com/openvinotoolkit/openvino/blob/master/docs/dev/conditional_compilation.md
+
+https://github.com/openvinotoolkit/openvino/commit/ec48fcb29bef94cca480573110a598afc3515019#
+
+https://github.com/openvinotoolkit/openvino/commit/1f96ddfbf9030e765aa0ca0a6aafb1ae2b8c3e98#diff-de6f7126342889fe9d0b505b0ac391db2275400488d5bab9194c2542a4f4d1fe
+