# WRF Installation
> [name=盛爾葳]

[toc]

# Compile WRF
## module load GCC ==(5%)==
- 說明作業環境
- Check `module list`


## Install HDF5 + NetCDF ==(15%)==
- Check `which ncdump`


- Report (Why use this flag?)

使用 `which ncdump` 來確認 NetCDF 有正確安裝

HDF5:

CC=mpicc CXX=mpicxx \
./configure --enable-parallel --enable-fortran \
--with-zlib=$APPROOT/opt/zlib-1.2.11 \
--prefix=$APPROOT/opt/hdf5-1.8.21 \
--enable-shared --enable-hl

NetCDF:

CC=mpicc CXX=mpicxx \
CPPFLAGS="-I$APPROOT/opt/hdf5-1.8.21/include -I$APPROOT/opt/pnetcdf-1.12.0/include -I$APPROOT/zlib-1.2.11/include" \
LDFLAGS="-L$APPROOT/opt/hdf5-1.8.21/lib -L$APPROOT/opt/pnetcdf-1.12.0/lib -L$APPROOT/opt/zlib-1.2.11/lib"  \
./configure --enable-pnetcdf \
--enable-parallel-tests \
--disable-dap --disable-shared \
--enable-netcdf4 \
--prefix=$APPROOT/opt/netcdf-c-4.7.3 

## Get WRF.exe ==(20%)==
- Check `tail -15 build_wrf.log`


# Run WRF:
## Just run on headnode ==(5%)==
- Check Screenshot


## Single Node with Slurm ==(15%)==
- Check `./validate.csh ./VALIDATION ./VALIDATE`




:::spoiler 原有資料




:::

## Optimization(Multiple Node, AVX512...) ==(20% ⬆️)==
- Check `./timing.csh TIMING/rsl.out.0000`

在 ctest 上測試
- 1 node


- 2 nodes


- 4 nodes


- Report (What do you do?)
- 使用 `-march=cascadelake` 和 `-mtune=native` 啟用 AVX512

---

# Others
## Profile WRF ==(15%)==:
- Check Vtune Screenshot




- Report (Based on the results, What are your assumptions?)

- Low CPU Utilization:
- Both logical and physical core utilization is very low (0.3%), suggesting the application is not effectively leveraging the available parallelism on the CPU.

## Display output ==(5%)==:
- Check Screenshot

另外下載 ncview 套件來呈現原圖!

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