You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
143 lines
6.0 KiB
143 lines
6.0 KiB
# Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
|
|
# Use of this source code is governed by a BSD-style license that can be
|
|
# found in the LICENSE file.
|
|
"""The pipeline_worker functions of the build and test stage of the framework.
|
|
|
|
Part of the Chrome build flags optimization.
|
|
|
|
This module defines the helper and the worker. If there are duplicate tasks, for
|
|
example t1 and t2, needs to be built/tested, one of them, for example t1, will
|
|
be built/tested and the helper waits for the result of t1 and set the results of
|
|
the other task, t2 here, to be the same as that of t1. Setting the result of t2
|
|
to be the same as t1 is referred to as resolving the result of t2.
|
|
The worker invokes the work method of the tasks that are not duplicate.
|
|
"""
|
|
|
|
__author__ = 'yuhenglong@google.com (Yuheng Long)'
|
|
|
|
import pipeline_process
|
|
|
|
|
|
def Helper(stage, done_dict, helper_queue, completed_queue, result_queue):
|
|
"""Helper that filters duplicate tasks.
|
|
|
|
This method Continuously pulls duplicate tasks from the helper_queue. The
|
|
duplicate tasks need not be compiled/tested. This method also pulls completed
|
|
tasks from the worker queue and let the results of the duplicate tasks be the
|
|
same as their corresponding finished task.
|
|
|
|
Args:
|
|
stage: The current stage of the pipeline, for example, build stage or test
|
|
stage.
|
|
done_dict: A dictionary of tasks that are done. The key of the dictionary is
|
|
the identifier of the task. The value of the dictionary is the results of
|
|
performing the corresponding task.
|
|
helper_queue: A queue of duplicate tasks whose results need to be resolved.
|
|
This is a communication channel between the pipeline_process and this
|
|
helper process.
|
|
completed_queue: A queue of tasks that have been built/tested. The results
|
|
of these tasks are needed to resolve the results of the duplicate tasks.
|
|
This is the communication channel between the workers and this helper
|
|
process.
|
|
result_queue: After the results of the duplicate tasks have been resolved,
|
|
the duplicate tasks will be sent to the next stage via this queue.
|
|
"""
|
|
|
|
# The list of duplicate tasks, the results of which need to be resolved.
|
|
waiting_list = []
|
|
|
|
while True:
|
|
# Pull duplicate task from the helper queue.
|
|
if not helper_queue.empty():
|
|
task = helper_queue.get()
|
|
|
|
if task == pipeline_process.POISONPILL:
|
|
# Poison pill means no more duplicate task from the helper queue.
|
|
break
|
|
|
|
# The task has not been performed before.
|
|
assert not task.Done(stage)
|
|
|
|
# The identifier of this task.
|
|
identifier = task.GetIdentifier(stage)
|
|
|
|
# If a duplicate task comes before the corresponding resolved results from
|
|
# the completed_queue, it will be put in the waiting list. If the result
|
|
# arrives before the duplicate task, the duplicate task will be resolved
|
|
# right away.
|
|
if identifier in done_dict:
|
|
# This task has been encountered before and the result is available. The
|
|
# result can be resolved right away.
|
|
task.SetResult(stage, done_dict[identifier])
|
|
result_queue.put(task)
|
|
else:
|
|
waiting_list.append(task)
|
|
|
|
# Check and get completed tasks from completed_queue.
|
|
GetResultFromCompletedQueue(stage, completed_queue, done_dict, waiting_list,
|
|
result_queue)
|
|
|
|
# Wait to resolve the results of the remaining duplicate tasks.
|
|
while waiting_list:
|
|
GetResultFromCompletedQueue(stage, completed_queue, done_dict, waiting_list,
|
|
result_queue)
|
|
|
|
|
|
def GetResultFromCompletedQueue(stage, completed_queue, done_dict, waiting_list,
|
|
result_queue):
|
|
"""Pull results from the completed queue and resolves duplicate tasks.
|
|
|
|
Args:
|
|
stage: The current stage of the pipeline, for example, build stage or test
|
|
stage.
|
|
completed_queue: A queue of tasks that have been performed. The results of
|
|
these tasks are needed to resolve the results of the duplicate tasks. This
|
|
is the communication channel between the workers and this method.
|
|
done_dict: A dictionary of tasks that are done. The key of the dictionary is
|
|
the optimization flags of the task. The value of the dictionary is the
|
|
compilation results of the corresponding task.
|
|
waiting_list: The list of duplicate tasks, the results of which need to be
|
|
resolved.
|
|
result_queue: After the results of the duplicate tasks have been resolved,
|
|
the duplicate tasks will be sent to the next stage via this queue.
|
|
|
|
This helper method tries to pull a completed task from the completed queue.
|
|
If it gets a task from the queue, it resolves the results of all the relevant
|
|
duplicate tasks in the waiting list. Relevant tasks are the tasks that have
|
|
the same flags as the currently received results from the completed_queue.
|
|
"""
|
|
# Pull completed task from the worker queue.
|
|
if not completed_queue.empty():
|
|
(identifier, result) = completed_queue.get()
|
|
done_dict[identifier] = result
|
|
|
|
tasks = [t for t in waiting_list if t.GetIdentifier(stage) == identifier]
|
|
for duplicate_task in tasks:
|
|
duplicate_task.SetResult(stage, result)
|
|
result_queue.put(duplicate_task)
|
|
waiting_list.remove(duplicate_task)
|
|
|
|
|
|
def Worker(stage, task, helper_queue, result_queue):
|
|
"""Worker that performs the task.
|
|
|
|
This method calls the work method of the input task and distribute the result
|
|
to the helper and the next stage.
|
|
|
|
Args:
|
|
stage: The current stage of the pipeline, for example, build stage or test
|
|
stage.
|
|
task: Input task that needs to be performed.
|
|
helper_queue: Queue that holds the completed tasks and the results. This is
|
|
the communication channel between the worker and the helper.
|
|
result_queue: Queue that holds the completed tasks and the results. This is
|
|
the communication channel between the worker and the next stage.
|
|
"""
|
|
|
|
# The task has not been completed before.
|
|
assert not task.Done(stage)
|
|
|
|
task.Work(stage)
|
|
helper_queue.put((task.GetIdentifier(stage), task.GetResult(stage)))
|
|
result_queue.put(task)
|