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How to use read_from_vmstat method in avocado

Best Python code snippet using avocado_python

transparent_hugepages.py

Source:transparent_hugepages.py

...44            "mem_size", default=memory.meminfo.MemFree.m)45        self.dd_timeout = self.params.get("dd_timeout", default=900)46        self.thp_split = None47        try:48            memory.read_from_vmstat("thp_split_page")49            self.thp_split = "thp_split_page"50        except IndexError:51            self.thp_split = "thp_split"52        # Set block size as hugepage size * 253        self.block_size = memory.meminfo.Hugepagesize.m * 254        self.count = free_mem // self.block_size55        # Mount device as per free memory size56        if not os.path.exists(self.mem_path):57            os.makedirs(self.mem_path)58        self.device = Partition(device="none", mountpoint=self.mem_path)59        self.device.mount(mountpoint=self.mem_path, fstype="tmpfs",60                          args='-o size=%dM' % free_mem, mnt_check=False)61    def test(self):62        '''63        Enables THP , Runs the dd workload and checks whether THP64        has been allocated.65        '''66        # Enables THP67        try:68            memory.set_thp_value("enabled", "always")69        except Exception as details:70            self.fail("Failed  %s" % details)71        # Read thp values before stressing the system72        thp_alloted_before = int(memory.read_from_vmstat("thp_fault_alloc"))73        thp_split_before = int(memory.read_from_vmstat(self.thp_split))74        thp_collapse_alloc_before = int(memory.read_from_vmstat75                                        ("thp_collapse_alloc"))76        # Start Stresssing the  System77        self.log.info('Stress testing using dd command')78        for iterator in range(self.count):79            stress_cmd = 'dd if=/dev/zero of=%s/%d bs=%dM count=1'\80                         % (self.mem_path, iterator, self.block_size)81            if(process.system(stress_cmd, timeout=self.dd_timeout,82                              verbose=False, ignore_status=True, shell=True)):83                self.fail('dd command failed  %s' % stress_cmd)84        # Read thp values after stressing the system85        thp_alloted_after = int(memory.read_from_vmstat("thp_fault_alloc"))86        thp_split_after = int(memory.read_from_vmstat(self.thp_split))87        thp_collapse_alloc_after = int(memory.read_from_vmstat88                                       ("thp_collapse_alloc"))89        # Check whether THP is Used or not90        if thp_alloted_after <= thp_alloted_before:91            e_msg = "Thp usage count has not increased\n"92            e_msg += "Before Stress:%d\nAfter stress:%d" % (thp_alloted_before,93                                                            thp_alloted_after)94            self.fail(e_msg)95        else:96            thp_fault_alloc = thp_alloted_after - thp_alloted_before97            thp_split = thp_split_after - thp_split_before98            thp_collapse_alloc = (thp_collapse_alloc_after -99                                  thp_collapse_alloc_before)100            self.log.info("\nTest statistics, changes during test run:")...

mlock_basic.py

Source:mlock_basic.py

...50        Start mlock basic test51        """52        error_context.context("Get nr_mlock and nr_unevictable in host"53                              " before VM start!", logging.info)54        self.mlock_pre = read_from_vmstat("nr_mlock")55        self.unevictable_pre = read_from_vmstat("nr_unevictable")56        logging.info("mlock_pre is %d and unevictable_pre is %d.",57                     self.mlock_pre, self.unevictable_pre)58        self.params["start_vm"] = "yes"59        error_context.context("Starting VM!", logging.info)60        env_process.preprocess_vm(self.test, self.params,61                                  self.env, self.params["main_vm"])62        self.vm = self.env.get_vm(self.params["main_vm"])63        self.vm.verify_alive()64        error_context.context("Get nr_mlock and nr_unevictable in host"65                              " after VM start!", logging.info)66        self.mlock_post = read_from_vmstat("nr_mlock")67        self.unevictable_post = read_from_vmstat("nr_unevictable")68        logging.info("mlock_post is %d and unevictable_post is %d.",69                     self.mlock_post, self.unevictable_post)70        self._check_mlock_unevictable()71@error_context.context_aware72def run(test, params, env):73    """74    [Mlock] Basic test, this case will:75    1) Get nr_mlock and nr_unevictable in host before VM start.76    2) Start the VM.77    3) Get nr_mlock and nr_unevictable in host after VM start.78    4) Check nr_mlock and nr_unevictable with VM memory.79    5) Check kernel crash80    :param test: QEMU test object81    :param params: Dictionary with the test parameters...

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