OS Configuration

This section describes how to optimize the page size of the Linux kernel on the OpenEuler OS.

openEuler 22.03 LTS SP4 uses a 4 KB page table by default. Change the page table size to 64 KB and test the inference performance of common NLP models before and after the size change.

Run the following command to query the size of the Linux kernel page table:

getconf PAGESIZE

You can change the size of the Linux kernel page table in either of the following ways:

rpm -ivh --nodeps --force *.rpm 

Method 2: Perform compilation and installation using the source code.

1. Install the required dependencies.

   yum install -y ncurses-devel bc openssl-devel rpm-build bison flex rsync dwarves elfutils-libelf-devel 

2. Obtain the kernel source code.

   yum -y install kernel-source 

   The downloaded kernel source code is saved in the /usr/src directory.

   

3. Compile the kernel.
   1. Run the following command to open the .config file:

      cd /usr/src/linux-5.10.0-254.0.0.158.oe2203sp4.aarch64
      vim .config

      In the .config file, change the value of CONFIG_LOCALVERSION to 64k. This parameter is used to display the new kernel version number. This is to distinguish the default kernel from the kernel of 64 KB.

   2. Apply the configuration file and modify the kernel parameters.

      make menuconfig

   3. On the GUI, choose Kernel Features > Page Size, set Page Size to 64KB, save the settings, and exit.

      

   4. Perform the compilation.

      make rpm-pkg -j 

      After the compilation is complete, the generated kernel RPM installation package is saved in the /root/rpmbuild/RPMS/aarch64 directory.

      

4. Install the kernel package.

   cd /root/rpmbuild/RPMS/aarch64
   rpm -ivh --nodeps --force *.rpm 

5. Restart the server.

   reboot 

6. After the restart, check the kernel and page size.

   uname -a

   The result shows that the page size has been changed to 64 KB.