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How to use read_from_meminfo method in avocado

Best Python code snippet using avocado_python

utils_memory.py

Source:utils_memory.py

...5import os6from autotest.client import utils7from autotest.client.shared import error8# Returns total memory in kb9def read_from_meminfo(key):10    cmd_result = utils.run('grep %s /proc/meminfo' % key, verbose=False)11    meminfo = cmd_result.stdout12    return int(re.search(r'\d+', meminfo).group(0))13def memtotal():14    return read_from_meminfo('MemTotal')15def freememtotal():16    return read_from_meminfo('MemFree')17def rounded_memtotal():18    # Get total of all physical mem, in kbytes19    usable_kbytes = memtotal()20    # usable_kbytes is system's usable DRAM in kbytes,21    #   as reported by memtotal() from device /proc/meminfo memtotal22    #   after Linux deducts 1.5% to 5.1% for system table overhead23    # Undo the unknown actual deduction by rounding up24    #   to next small multiple of a big power-of-two25    #   eg  12GB - 5.1% gets rounded back up to 12GB26    mindeduct = 0.015  # 1.5 percent27    maxdeduct = 0.055  # 5.5 percent28    # deduction range 1.5% .. 5.5% supports physical mem sizes29    #    6GB .. 12GB in steps of .5GB30    #   12GB .. 24GB in steps of 1 GB31    #   24GB .. 48GB in steps of 2 GB ...32    # Finer granularity in physical mem sizes would require33    #   tighter spread between min and max possible deductions34    # increase mem size by at least min deduction, without rounding35    min_kbytes = int(usable_kbytes / (1.0 - mindeduct))36    # increase mem size further by 2**n rounding, by 0..roundKb or more37    round_kbytes = int(usable_kbytes / (1.0 - maxdeduct)) - min_kbytes38    # find least binary roundup 2**n that covers worst-cast roundKb39    mod2n = 1 << int(math.ceil(math.log(round_kbytes, 2)))40    # have round_kbytes <= mod2n < round_kbytes*241    # round min_kbytes up to next multiple of mod2n42    phys_kbytes = min_kbytes + mod2n - 143    phys_kbytes = phys_kbytes - (phys_kbytes % mod2n)  # clear low bits44    return phys_kbytes45def numa_nodes():46    node_paths = glob.glob('/sys/devices/system/node/node*')47    nodes = [int(re.sub(r'.*node(\d+)', r'\1', x)) for x in node_paths]48    return (sorted(nodes))49def node_size():50    nodes = max(len(numa_nodes()), 1)51    return ((memtotal() * 1024) / nodes)52def get_huge_page_size():53    return read_from_meminfo('Hugepagesize')54def get_num_huge_pages():55    return read_from_meminfo('HugePages_Total')56def get_num_huge_pages_free():57    return read_from_meminfo('HugePages_Free')58def get_num_huge_pages_rsvd():59    return read_from_meminfo('HugePages_Rsvd')60def get_num_anon_huge_pages(pid=0):61    if int(pid) > 1:62        # get AnonHugePages usage of specified process63        return read_from_smaps(pid, 'AnonHugePages')64    else:65        # invalid pid, so return AnonHugePages of the host66        return read_from_meminfo('AnonHugePages')67def get_transparent_hugepage():68    UPSTREAM_THP_PATH = "/sys/kernel/mm/transparent_hugepage"69    RH_THP_PATH = "/sys/kernel/mm/redhat_transparent_hugepage"70    if os.path.isdir(UPSTREAM_THP_PATH):71        thp_path = UPSTREAM_THP_PATH72    elif os.path.isdir(RH_THP_PATH):73        thp_path = RH_THP_PATH74    else:75        raise error.TestFail("transparent hugepage Not supported")76    out = utils.system_output('cat %s/enabled' % thp_path)77    if out[0] == "[always]":78        return 'always'79    elif out[1] == "[madvise]":80        return 'madvise'...

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