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How to use parallel_on_machines method in autotest

Best Python code snippet using autotest_python

site_server_job.py

Source:site_server_job.py

1# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.2# Use of this source code is governed by a BSD-style license that can be3# found in the LICENSE file.4"""Site extensions to server_job.  Adds distribute_across_machines()."""5import os, logging, multiprocessing6from autotest_lib.server import site_gtest_runner, site_server_job_utils7from autotest_lib.server import subcommand8from autotest_lib.server.server_job import base_server_job9import utils10def get_site_job_data(job):11    """Add custom data to the job keyval info.12    When multiple machines are used in a job, change the hostname to13    the platform of the first machine instead of machine1,machine2,...  This14    makes the job reports easier to read and keeps the tko_machines table from15    growing too large.16    Args:17        job: instance of server_job.18    Returns:19        keyval dictionary with new hostname value, or empty dictionary.20    """21    site_job_data = {}22    # Only modify hostname on multimachine jobs. Assume all host have the same23    # platform.24    if len(job.machines) > 1:25        # Search through machines for first machine with a platform.26        for host in job.machines:27            keyval_path = os.path.join(job.resultdir, 'host_keyvals', host)28            keyvals = utils.read_keyval(keyval_path)29            host_plat = keyvals.get('platform', None)30            if not host_plat:31                continue32            site_job_data['hostname'] = host_plat33            break34    return site_job_data35class site_server_job(base_server_job):36    """Extend server_job adding distribute_across_machines."""37    def __init__(self, *args, **dargs):38        super(site_server_job, self).__init__(*args, **dargs)39    def run(self, *args, **dargs):40        """Extend server_job.run adding gtest_runner to the namespace."""41        gtest_run = {'gtest_runner': site_gtest_runner.gtest_runner()}42        # Namespace is the 5th parameter to run().  If args has 5 or more43        # entries in it then we need to fix-up this namespace entry.44        if len(args) >= 5:45            args[4].update(gtest_run)46        # Else, if present, namespace must be in dargs.47        else:48            dargs.setdefault('namespace', gtest_run).update(gtest_run)49        # Now call the original run() with the modified namespace containing a50        # gtest_runner51        super(site_server_job, self).run(*args, **dargs)52    def distribute_across_machines(self, tests, machines,53                                   continuous_parsing=False):54        """Run each test in tests once using machines.55        Instead of running each test on each machine like parallel_on_machines,56        run each test once across all machines. Put another way, the total57        number of tests run by parallel_on_machines is len(tests) *58        len(machines). The number of tests run by distribute_across_machines is59        len(tests).60        Args:61            tests: List of tests to run.62            machines: List of machines to use.63            continuous_parsing: Bool, if true parse job while running.64        """65        # The Queue is thread safe, but since a machine may have to search66        # through the queue to find a valid test the lock provides exclusive67        # queue access for more than just the get call.68        test_queue = multiprocessing.JoinableQueue()69        test_queue_lock = multiprocessing.Lock()70        unique_machine_attributes = []71        sub_commands = []72        work_dir = self.resultdir73        for machine in machines:74            if 'group' in self.resultdir:75                work_dir = os.path.join(self.resultdir, machine)76            mw = site_server_job_utils.machine_worker(self,77                                                      machine,78                                                      work_dir,79                                                      test_queue,80                                                      test_queue_lock,81                                                      continuous_parsing)82            # Create the subcommand instance to run this machine worker.83            sub_commands.append(subcommand.subcommand(mw.run,84                                                      [],85                                                      work_dir))86            # To (potentially) speed up searching for valid tests create a list87            # of unique attribute sets present in the machines for this job. If88            # sets were hashable we could just use a dictionary for fast89            # verification. This at least reduces the search space from the90            # number of machines to the number of unique machines.91            if not mw.attribute_set in unique_machine_attributes:92                unique_machine_attributes.append(mw.attribute_set)93        # Only queue tests which are valid on at least one machine.  Record94        # skipped tests in the status.log file using record_skipped_test().95        for test_entry in tests:96            # Check if it's an old style test entry.97            if len(test_entry) > 2 and not isinstance(test_entry[2], dict):98                test_attribs = {'include': test_entry[2]}99                if len(test_entry) > 3:100                    test_attribs['exclude'] = test_entry[3]101                if len(test_entry) > 4:102                    test_attribs['attributes'] = test_entry[4]103                test_entry = list(test_entry[:2])104                test_entry.append(test_attribs)105            ti = site_server_job_utils.test_item(*test_entry)106            machine_found = False107            for ma in unique_machine_attributes:108                if ti.validate(ma):109                    test_queue.put(ti)110                    machine_found = True111                    break112            if not machine_found:113                self.record_skipped_test(ti)114        # Run valid tests and wait for completion.115        subcommand.parallel(sub_commands)116    def record_skipped_test(self, skipped_test, message=None):117        """Insert a failure record into status.log for this test."""118        msg = message119        if msg is None:120            msg = 'No valid machines found for test %s.' % skipped_test121        logging.info(msg)122        self.record('START', None, skipped_test.test_name)123        self.record('INFO', None, skipped_test.test_name, msg)...

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