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How to use freememtotal method in avocado

Best Python code snippet using avocado_python

numa_stress.py

Source:numa_stress.py

...81    memory_file = utils_misc.get_path(tmpfs_path, "test")82    dd_cmd = "dd if=/dev/urandom of=%s bs=1k count=%s" % (memory_file,83                                                          tmpfs_size)84    utils_memory.drop_caches()85    if utils_memory.freememtotal() < tmpfs_size:86        test.cancel("Host does not have enough free memory to run the test, "87                    "skipping test...")88    if not os.path.isdir(tmpfs_path):89        os.mkdir(tmpfs_path)90    test_mem = float(params.get("mem"))*float(params.get("mem_ratio", 0.8))91    stress_args = "--cpu 4 --io 4 --vm 2 --vm-bytes %sM" % int(test_mem / 2)92    most_used_node, memory_used = max_mem_map_node(host_numa_node, qemu_pid)93    for test_round in range(test_count):94        if os.path.exists(memory_file):95            os.remove(memory_file)96        utils_memory.drop_caches()97        if utils_memory.freememtotal() < tmpfs_size:98            test.error("Don't have enough memory to execute this "99                       "test after %s round" % test_round)100        error_context.context("Executing stress test round: %s" % test_round,101                              logging.info)102        numa_node_malloc = most_used_node103        numa_dd_cmd = "numactl -m %s %s" % (numa_node_malloc, dd_cmd)104        error_context.context("Try to allocate memory in node %s"105                              % numa_node_malloc, logging.info)106        try:107            utils_misc.mount("none", tmpfs_path, "tmpfs", perm=mount_fs_size)108            funcatexit.register(env, params.get("type"), utils_misc.umount,109                                "none", tmpfs_path, "tmpfs")110            process.system(numa_dd_cmd, timeout=dd_timeout, shell=True)111        except Exception as error_msg:...

hardware_SAT.py

Source:hardware_SAT.py

...47                 disk_thread=True):48        '''49        Args:50          free_memory_fraction: Fraction of free memory (as determined by51            utils.freememtotal()) to use.52          wait_secs: time to wait in seconds before executing stressapptest.53          disk_thread: also stress disk using -f argument of stressapptest.54        '''55        assert free_memory_fraction > 056        assert free_memory_fraction < 157        # Wait other parallel tests memory usage to settle to a stable value, so58        # stressapptest will not claim too much memory.59        if wait_secs:60            time.sleep(wait_secs)61        # Allow shmem access to all of memory. This is used for 32 bit62        # access to > 1.4G. Virtual address space limitation prevents63        # directly mapping the memory.64        utils.run('mount -o remount,size=100% /dev/shm')65        cpus = max(utils.count_cpus(), 1)66        mbytes = max(int(utils.freememtotal() * free_memory_fraction / 1024),67                     512)68        # Even though shared memory allows us to go past the 1.4G69        # limit, ftruncate still limits us to 2G max on 32 bit systems.70        if sys.maxsize < 2**32 and mbytes > 2047:71            mbytes = 204772        # SAT should use as much memory as possible, while still73        # avoiding OOMs and allowing the kernel to run, so that74        # the maximum amoun tof memory can be tested.75        args = ' -M %d' % mbytes  # megabytes to test76        # The number of seconds under test can be chosen to fit into77        # manufacturing or test flow. 60 seconds gives several78        # passes and several patterns over each memory location79        # and should catch clearly fautly memeory. 4 hours80        # is an effective runin test, to catch lower frequency errors....

ksm_ksmtuned.py

Source:ksm_ksmtuned.py

...45        qemu_used_page = utils_misc.normalize_data_size(process.getoutput(46            params['cmd_get_qemu_used_mem'] % qemu_pid, shell=True) + 'K', 'B')47        pagesize = utils_memory.getpagesize()48        qemu_used_mem = int(float(qemu_used_page)) * pagesize49        free_mem_host = utils_memory.freememtotal()50        ksm_status = process.getoutput(params['cmd_check_ksm_status'])51        vm.destroy()52        logging.info('The ksm threshold is %s, the memory allocated by qemu is'53                     ' %s, and the total free memory on host is %s.',54                     ksm_thres, qemu_used_mem, free_mem_host)55        if free_mem_host >= ksm_thres:56            if ksm_status != '0':57                test.fail('Ksm should not start.')58            if stress:59                test.error('The host resource is not consumed as expected.')60        elif ksm_status == '0':61            test.fail('Ksm should start but it does not.')62    total_mem_host = utils_memory.memtotal()63    utils_memory.drop_caches()64    free_mem_host = utils_memory.freememtotal()65    ksm_thres = process.getoutput(params['cmd_get_thres'], shell=True)66    ksm_thres = int(total_mem_host *67                    (int(re.findall('\\d+', ksm_thres)[0]) / 100))68    guest_mem = (free_mem_host - ksm_thres) // 269    if arch.ARCH in ('ppc64', 'ppc64le'):70        guest_mem = guest_mem - guest_mem % (256 * 1024)71    status_ksm_service = process.system(72        params['cmd_status_ksmtuned'], ignore_status=True)73    if status_ksm_service != 0:74        process.run(params['cmd_start_ksmtuned'])75    check_ksm(guest_mem)76    ksm_config_file = params['ksm_config_file']77    backup_file = ksm_config_file + '.backup'78    copyfile(ksm_config_file, backup_file)...

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