How to use read_from_meminfo method in avocado

Best Python code snippet using avocado_python Github


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...5import os6from autotest.client import utils7from autotest.client.shared import error8# Returns total memory in kb9def read_from_meminfo(key):10 cmd_result ='grep %s /proc/meminfo' % key, verbose=False)11 meminfo = cmd_result.stdout12 return int('\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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