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# 1. Introduction :
This document purpose is to build the DMM.
# 2. Build DPDK:
DPDK need to be built for DMM RTE dependency.
- Steps :
download dpdk-16.04.tar.xz from DPDK release, you can get it from [http://static.dpdk.org/rel](http://static.dpdk.org/rel)
```
#wget http://static.dpdk.org/rel/dpdk-16.04.tar.xz
#tar xvf dpdk-16.04.tar.xz
#vi dpdk-16.04/config/common_base #make CONFIG_RTE_BUILD_SHARED_LIB=y
#cd dpdk-16.04
#make install T=x86_64-native-linuxapp-gcc DESTDIR=/root/dpdk_build/tmp2
#cd x86_64-native-linuxapp-gcc
#make #to install the dpdk which will generate .so inside lib folder in the path.
```
Make sure the path same as list up
```
#mkdir -p /root/dpdk_build/tmp2/opt/uvp/evs/
#cp /root/dpdk/dpdk-16.04/x86_64-native-linuxapp-gcc/kmod/igb_uio.ko /root/dpdk_build/tmp2/opt/uvp/evs/
```
Note:
Environment:
Linux ubuntu 14.04 and above.
Make sure you have linux-headers-4.4.0-89 linux-headers-4.4.0-89-generic and check uname -a it should have 4.4.0-89-generic header
- Hugepage setting:
```
#vi /etc/default/grub
```
update GRUB\_CMDLINE\_LINUX\_DEFAULT="default\_hugepagesz=1G hugepagesz=1G hugepages=8"
```
#update-grub
#reboot
```
Check hugepage info HugePages_
```
#cat /proc/meminfo
```
- Mount hugepages:
```
#mount -t hugetlbfs -o pagesize=1G none /mnt/nstackhuge/
```
```
#mkdir /var/run/ip_module ##if not exist
#export LD_LIBRARY_PATH=/root/xxxx/DMM/release/lib64/
```
Note:
no need LD_PRELOAD, This macro is for the same purpose.
- Enable detail log of nstack
```
#export NSTACK_LOG_ON=DBG
```
# 3. Build DMM:
```
#cd DMM/build
#cmake -D DMM_DPDK_INSTALL_DIR=$DPDK_INSTALL_PATH ..
#Note: DPDK_INSTALL_PATH - the path in which DPDK has been installed
```
after cmake all the makefiles and dependent .sh files will be copied under build directory.
```
#make -j 8
```
Note:
Sometimes compilation fails due to GLOB lib dependency, to solve this problem by following steps.
```
#cd ../thirdparty/glog/glog-0.3.4
#sudo autoreconf -ivf
#cd
#make -j 8
#bash -x release_tar.sh
```
Note:
Update path of DPDK install with /root/dpdk_build/tmp2 in below file
```
#vim ./release/script/nstack_var.sh # you can change it
```
# 4. Bring up the nStackMain process:
```
#rm -rf /product
#mkdir /product/
#chmod 777 /product/
#mkdir /mnt/nstackhuge -p
#goto /DMM/
#tar zxvf nStackServer.tar.gz
#cd nStackServer
#./start_nstack.sh
#ps -ef | grep nStackMain
```
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