How to use set_hugepages method in avocado

Best Python code snippet using avocado_python

dpdk-hugepages.py

Source:dpdk-hugepages.py

...36    '''Read number of reserved pages'''37    with open(path + '/nr_hugepages') as nr_hugepages:38        return int(nr_hugepages.read())39    return 040def set_hugepages(path, pages):41    '''Write the number of reserved huge pages'''42    filename = path + '/nr_hugepages'43    try:44        with open(filename, 'w') as nr_hugepages:45            nr_hugepages.write('{}\n'.format(pages))46    except PermissionError:47        sys.exit('Permission denied: need to be root!')48    except FileNotFoundError:49        filename = os.path.basename(path)50        size = filename[10:]51        sys.exit('{} is not a valid system huge page size'.format(size))52def show_numa_pages():53    '''Show huge page reservations on Numa system'''54    print('Node Pages Size Total')55    for numa_path in glob.glob('/sys/devices/system/node/node*'):56        node = numa_path[29:]  # slice after /sys/devices/system/node/node57        path = numa_path + '/hugepages'58        for hdir in os.listdir(path):59            pages = get_hugepages(path + '/' + hdir)60            if pages > 0:61                kb = int(hdir[10:-2])  # slice out of hugepages-NNNkB62                print('{:<4} {:<5} {:<6} {}'.format(node, pages,63                                                    fmt_memsize(kb),64                                                    fmt_memsize(pages * kb)))65def show_non_numa_pages():66    '''Show huge page reservations on non Numa system'''67    print('Pages Size Total')68    path = '/sys/kernel/mm/hugepages'69    for hdir in os.listdir(path):70        pages = get_hugepages(path + '/' + hdir)71        if pages > 0:72            kb = int(hdir[10:-2])73            print('{:<5} {:<6} {}'.format(pages, fmt_memsize(kb),74                                          fmt_memsize(pages * kb)))75def show_pages():76    '''Show existing huge page settings'''77    if is_numa():78        show_numa_pages()79    else:80        show_non_numa_pages()81def clear_pages():82    '''Clear all existing huge page mappings'''83    if is_numa():84        dirs = glob.glob(85            '/sys/devices/system/node/node*/hugepages/hugepages-*')86    else:87        dirs = glob.glob('/sys/kernel/mm/hugepages/hugepages-*')88    for path in dirs:89        set_hugepages(path, 0)90def default_pagesize():91    '''Get default huge page size from /proc/meminfo'''92    with open('/proc/meminfo') as meminfo:93        for line in meminfo:94            if line.startswith('Hugepagesize:'):95                return int(line.split()[1])96    return None97def set_numa_pages(pages, hugepgsz, node=None):98    '''Set huge page reservation on Numa system'''99    if node:100        nodes = ['/sys/devices/system/node/node{}/hugepages'.format(node)]101    else:102        nodes = glob.glob('/sys/devices/system/node/node*/hugepages')103    for node_path in nodes:104        huge_path = '{}/hugepages-{}kB'.format(node_path, hugepgsz)105        set_hugepages(huge_path, pages)106def set_non_numa_pages(pages, hugepgsz):107    '''Set huge page reservation on non Numa system'''108    path = '/sys/kernel/mm/hugepages/hugepages-{}kB'.format(hugepgsz)109    set_hugepages(path, pages)110def reserve_pages(pages, hugepgsz, node=None):111    '''Set the number of huge pages to be reserved'''112    if node or is_numa():113        set_numa_pages(pages, hugepgsz, node=node)114    else:115        set_non_numa_pages(pages, hugepgsz)116def get_mountpoints():117    '''Get list of where hugepage filesystem is mounted'''118    mounted = []119    with open('/proc/mounts') as mounts:120        for line in mounts:121            fields = line.split()122            if fields[2] != 'hugetlbfs':123                continue...

startvm

Source:startvm

...3import libvirt4import sys,os5import dbus6from subprocess import call,Popen7def set_hugepages(hugepages=8600):8    with open('/proc/sys/vm/nr_hugepages','w') as f:9        f.write(str(hugepages))10    time.sleep(1)11    with open('/proc/sys/vm/nr_hugepages','r') as f:12        return hugepages<=int(f.readline(1).rstrip())13def demote():14    os.setgid(1000)15    os.setuid(1000)16def startvm():17    conn=libvirt.open('qemu:///system')18    if (not 'default' in conn.listNetworks()):19        conn.networkLookupByName('default').create()20    if (not 'win10' in [conn.lookupByID(id).name() for id in conn.listDomainsID()]):21        conn.lookupByName('win10').create()22    call("systemctl stop usbserver.socket usbserver.service".split())23    time.sleep(0.5)24    call("systemctl start usbserver.socket usbserver.service".split())25    call("systemctl start sshd".split())26    #demote to user27    os.environ["LIBASOUND_DEBUG"]="1"28    os.environ["HOME"]="/home/jknedlik"29    os.chdir("/home/jknedlik/")30    #close_fds detaches the subprocess31    Popen("scream -o pulseaudio -i virbr0 -v -u -p 4011".split(),close_fds=True,preexec_fn=demote)32    lg=input("Do you want to open a looking class client? [y/N]")33    #if(lg=="y" or lg=="Y"):34    #Popen("scream -o pulseaudio -i virbr0 -v -u -p 4011".split(),close_fds=True,preexec_fn=()35set_hugepages()36os.chown("/dev/nvme0n1",0,992)#root:kvm...

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