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dpdk-hugepages.cpython-310.pyc
o -�h� � @ s� d Z ddlZddlZddlZddlZddlZddlmZ dZdZ dd� Z dd � Z d d � Z d d � Z dd� Zdd� Zdd� Zdd� Zdd� Zdd� Zdd� Zd-d d �Zd d � Zd-d d!�Zd"d#� Zd$d%� Zd&d'� Zd(d)� Zd*d+� Z e d,krwe � dS dS ).z;Script to query and setup huge pages for DPDK applications.� N)�log2�KMGz/dev/hugepagesc C s8 t t| �d �}t| }d|d }d�t | | �|�S )z1Format memory size in kB into conventional format� � z{}{}b)�intr � BINARY_PREFIX�format)�kb�logk�suffix�unit� r �/usr/bin/dpdk-hugepages.py� fmt_memsize s r c C sz t �dt d | �� �}|du rt�d�| �� t|�d��}|�d�}|dkr.t |d �S t� |�}t |d|d �S ) z%Convert memory size with suffix to kBz(\d+)([z]?)$Nz{} is not a valid size� r � � r ) �re�matchr �upper�sys�exitr �float�groupr �find)�argr �numr �idxr r r � get_memsize s r c C s t j�d�S )z(Test if NUMA is necessary on this systemz/sys/devices/system/node)�os�path�existsr r r r �is_numa) s r" c C s* t j�| �}dd� t �|�D �}d�|�S )z Extract valid hugepage sizesc s s � | ] }|� d �d V qdS )�-r N)�split)�.0�dr r r � <genexpr>1 s � z'get_valid_page_sizes.<locals>.<genexpr>� )r r �dirname�listdir�join)r �dir�pg_sizesr r r �get_valid_page_sizes. s r. c C s< t | d ��}t|�� �W d � S 1 sw Y dS )z Read number of reserved pages� /nr_hugepagesNr )�openr �read)r � nr_hugepagesr r r � get_hugepages5 s �r3 c C s� | d }z t |d��}|�d�|�� W d � n1 s w Y W n ty1 t�d� Y n tyC t�d�t| ��� Y nw t| �}||krXt�d�|||�� dS dS )z'Write the number of reserved huge pagesr/ �wz{} Nz#Permission denied: need to be root!z'Invalid page size. Valid page sizes: {}z-Unable to set pages ({} instead of {} in {}).) r0 �writer �PermissionErrorr r �FileNotFoundErrorr. r3 )r �reqpages�filenamer2 �gotpagesr r r � set_hugepages< s& �� �� ��r; c C s� t d� t�d�D ]?} | dd� }| d }tj�|�s q t�|�D ]&}t|d | �}|dkrGt|dd � �}t d �||t |�t || ��� q!q dS ) z*Show huge page reservations on Numa systemzNode Pages Size Totalz /sys/devices/system/node/node*� Nz /hugepages�/r r ���z{:<4} {:<5} {:<6} {}) �print�globr r r! r* r3 r r r )� numa_path�noder �hdir�pagesr r r r �show_numa_pagesM s" ����rE c C sf t d� d} t�| �D ]%}t| d | �}|dkr0t|dd� �}t d�|t|�t|| ��� q dS ) z.Show huge page reservations on non Numa systemzPages Size Totalz/sys/kernel/mm/hugepagesr= r r r> z{:<5} {:<6} {}N)r? r r* r3 r r r )r rC rD r r r r �show_non_numa_pages^ s ���rF c C s t � rt� dS t� dS )z Show existing huge page settingsN)r" rE rF r r r r � show_pagesj s rG c C s4 t � r t�d�} nt�d�} | D ]}t|d� qdS )z%Clear all existing huge page mappingsz4/sys/devices/system/node/node*/hugepages/hugepages-*z$/sys/kernel/mm/hugepages/hugepages-*r N)r" r@ r; )�dirsr r r r � clear_pagesr s � �rI c C sd t d��$} | D ]}|�d�r t|�� d � W d � S qW d � dS 1 s+w Y dS )z-Get default huge page size from /proc/meminfoz /proc/meminfoz Hugepagesize:r N)r0 � startswithr r$ )�meminfo�liner r r �default_pagesize~ s �� ��rM c C s@ |r d� |�g}nt�d�}|D ] }d� ||�}t|| � qdS )z(Set huge page reservation on Numa systemz)/sys/devices/system/node/node{}/hugepagesz(/sys/devices/system/node/node*/hugepagesz{}/hugepages-{}kBN)r r@ r; )rD �hugepgszrB �nodes� node_path� huge_pathr r r �set_numa_pages� s �rR c C s d� |�}t|| � dS )z,Set huge page reservation on non Numa systemz'/sys/kernel/mm/hugepages/hugepages-{}kBN)r r; )rD rN r r r r �set_non_numa_pages� s rS c C s* |st � rt| ||d� dS t| |� dS )z+Set the number of huge pages to be reserved�rB N)r" rR rS )rD rN rB r r r � reserve_pages� s rU c C s` g } t d�� }|D ]}|�� }|d dkrq | �|d � q W d � | S 1 s)w Y | S )z0Get list of where hugepage filesystem is mountedz /proc/mountsr � hugetlbfsr N)r0 r$ �append)�mounted�mountsrL �fieldsr r r �get_mountpoints� s � ��r[ c C sL |t � v r t|d� dS d}| r|d�| d �7 }|d| 7 }t�|� dS )z Mount the huge TLB file systemzalready mountedNzmount -t hugetlbfsz -o pagesize={}r z nodev )r[ r? r r �system)�pagesize� mountpoint�cmdr r r � mount_huge� s r` c C s | t � v rt�d| � dS dS )z-Unmount the huge TLB file system (if mounted)zumount N)r[ r r\ )r^ r r r � umount_huge� s �ra c C s* t � } | rtdg| �R � dS td� dS )z*Show where huge page filesystem is mountedzHugepages mounted onzHugepages not mountedN)r[ r? )rX r r r � show_mount� s rb c C s� t jt jddd�} | jddddd� | jd d dd d� | jd d ddd� | jddddd� | jdddd� | jddddd� | jdd dd d� | jd dd d� | �� }|jrcd |_d |_|j|_d |_ |j rlt |j �}nt � }|syt �d!�|�� |jrt� |jr�tt� |jr�t |j�}|| d"kr�t �d#�||�� tt|| �||jd$� |j r�t|t� |jr�t� t� t� d%S d%S )&z7Process the command line arguments and setup huge pageszSetup huge pagesz� Examples: To display current huge page settings: %(prog)s -s To a complete setup of with 2 Gigabyte of 1G huge pages: %(prog)s -p 1G --setup 2G )�formatter_class� description�epilogz--showz-s� store_truez)print the current huge page configuration)�action�helpz--clearz-czclear existing huge pagesz--mountz-mz mount the huge page filesystemz --unmountz-uz&unmount the system huge page directoryz--nodez-nz$select numa node to reserve pages on)rh z --pagesizez-p�SIZEz choose huge page size to use)�metavarrh z --reservez-rz;reserve huge pages. Size is in bytes with K, M, or G suffixz--setupz;setup huge pages by doing clear, unmount, reserve and mountTzInvalid page size: {}kBr z9Huge reservation {}kB is not a multiple of page size {}kBrT N)�argparse�ArgumentParser�RawDescriptionHelpFormatter� add_argument� parse_args�setup�clear�unmount�reserve�mountr] r rM r r r rI ra � HUGE_MOUNTrU r rB r` �showrG r? rb )�parser�args� pagesize_kb� reserve_kbr r r �main� s� � �������� �� �r{ �__main__)N) �__doc__rk r@ r r r �mathr r ru r r r" r. r3 r; rE rF rG rI rM rR rS rU r[ r` ra rb r{ �__name__r r r r �<module> s> S �
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