| #!/usr/bin/env python |
| # Copyright 2017 The PDFium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| """Looks for performance regressions on all pushes since the last run. |
| |
| Run this nightly to have a periodical check for performance regressions. |
| |
| Stores the results for each run and last checkpoint in a results directory. |
| """ |
| |
| import argparse |
| import datetime |
| import json |
| import os |
| import sys |
| |
| from common import PrintWithTime |
| from common import RunCommandPropagateErr |
| from githelper import GitHelper |
| from safetynet_conclusions import PrintConclusionsDictHumanReadable |
| |
| |
| class JobContext(object): |
| """Context for a single run, including name and directory paths.""" |
| |
| def __init__(self, args): |
| self.datetime = datetime.datetime.now().strftime('%Y-%m-%d-%H-%M-%S') |
| self.results_dir = args.results_dir |
| self.last_revision_covered_file = os.path.join(self.results_dir, |
| 'last_revision_covered') |
| self.run_output_dir = os.path.join(self.results_dir, |
| 'profiles_%s' % self.datetime) |
| self.run_output_log_file = os.path.join(self.results_dir, |
| '%s.log' % self.datetime) |
| |
| |
| class JobRun(object): |
| """A single run looking for regressions since the last one.""" |
| |
| def __init__(self, args, context): |
| """Constructor. |
| |
| Args: |
| args: Namespace with arguments passed to the script. |
| context: JobContext for this run. |
| """ |
| self.git = GitHelper() |
| self.args = args |
| self.context = context |
| |
| def Run(self): |
| """Searches for regressions. |
| |
| Will only write a checkpoint when first run, and on all subsequent runs |
| a comparison is done against the last checkpoint. |
| |
| Returns: |
| Exit code for the script: 0 if no significant changes are found; 1 if |
| there was an error in the comparison; 3 if there was a regression; 4 if |
| there was an improvement and no regression. |
| """ |
| pdfium_src_dir = os.path.join( |
| os.path.dirname(__file__), |
| os.path.pardir, |
| os.path.pardir) |
| os.chdir(pdfium_src_dir) |
| |
| branch_to_restore = self.git.GetCurrentBranchName() |
| |
| if not self.args.no_checkout: |
| self.git.FetchOriginMaster() |
| self.git.Checkout('origin/master') |
| |
| # Make sure results dir exists |
| if not os.path.exists(self.context.results_dir): |
| os.makedirs(self.context.results_dir) |
| |
| if not os.path.exists(self.context.last_revision_covered_file): |
| result = self._InitialRun() |
| else: |
| with open(self.context.last_revision_covered_file) as f: |
| last_revision_covered = f.read().strip() |
| result = self._IncrementalRun(last_revision_covered) |
| |
| self.git.Checkout(branch_to_restore) |
| return result |
| |
| def _InitialRun(self): |
| """Initial run, just write a checkpoint. |
| |
| Returns: |
| Exit code for the script. |
| """ |
| current = self.git.GetCurrentBranchHash() |
| |
| PrintWithTime('Initial run, current is %s' % current) |
| |
| self._WriteCheckpoint(current) |
| |
| PrintWithTime('All set up, next runs will be incremental and perform ' |
| 'comparisons') |
| return 0 |
| |
| def _IncrementalRun(self, last_revision_covered): |
| """Incremental run, compare against last checkpoint and update it. |
| |
| Args: |
| last_revision_covered: String with hash for last checkpoint. |
| |
| Returns: |
| Exit code for the script. |
| """ |
| current = self.git.GetCurrentBranchHash() |
| |
| PrintWithTime('Incremental run, current is %s, last is %s' |
| % (current, last_revision_covered)) |
| |
| if not os.path.exists(self.context.run_output_dir): |
| os.makedirs(self.context.run_output_dir) |
| |
| if current == last_revision_covered: |
| PrintWithTime('No changes seen, finishing job') |
| output_info = { |
| 'metadata': self._BuildRunMetadata(last_revision_covered, |
| current, |
| False)} |
| self._WriteRawJson(output_info) |
| return 0 |
| |
| # Run compare |
| cmd = ['testing/tools/safetynet_compare.py', |
| '--this-repo', |
| '--machine-readable', |
| '--branch-before=%s' % last_revision_covered, |
| '--output-dir=%s' % self.context.run_output_dir] |
| cmd.extend(self.args.input_paths) |
| |
| json_output = RunCommandPropagateErr(cmd) |
| |
| if json_output is None: |
| return 1 |
| |
| output_info = json.loads(json_output) |
| |
| run_metadata = self._BuildRunMetadata(last_revision_covered, |
| current, |
| True) |
| output_info.setdefault('metadata', {}).update(run_metadata) |
| self._WriteRawJson(output_info) |
| |
| PrintConclusionsDictHumanReadable(output_info, |
| colored=(not self.args.output_to_log |
| and not self.args.no_color), |
| key='after') |
| |
| status = 0 |
| |
| if output_info['summary']['improvement']: |
| PrintWithTime('Improvement detected.') |
| status = 4 |
| |
| if output_info['summary']['regression']: |
| PrintWithTime('Regression detected.') |
| status = 3 |
| |
| if status == 0: |
| PrintWithTime('Nothing detected.') |
| |
| self._WriteCheckpoint(current) |
| |
| return status |
| |
| def _WriteRawJson(self, output_info): |
| json_output_file = os.path.join(self.context.run_output_dir, 'raw.json') |
| with open(json_output_file, 'w') as f: |
| json.dump(output_info, f) |
| |
| def _BuildRunMetadata(self, revision_before, revision_after, |
| comparison_performed): |
| return { |
| 'datetime': self.context.datetime, |
| 'revision_before': revision_before, |
| 'revision_after': revision_after, |
| 'comparison_performed': comparison_performed, |
| } |
| |
| def _WriteCheckpoint(self, checkpoint): |
| if not self.args.no_checkpoint: |
| with open(self.context.last_revision_covered_file, 'w') as f: |
| f.write(checkpoint + '\n') |
| |
| |
| def main(): |
| parser = argparse.ArgumentParser() |
| parser.add_argument('results_dir', |
| help='where to write the job results') |
| parser.add_argument('input_paths', nargs='+', |
| help='pdf files or directories to search for pdf files ' |
| 'to run as test cases') |
| parser.add_argument('--no-checkout', action='store_true', |
| help='whether to skip checking out origin/master. Use ' |
| 'for script debugging.') |
| parser.add_argument('--no-checkpoint', action='store_true', |
| help='whether to skip writing the new checkpoint. Use ' |
| 'for script debugging.') |
| parser.add_argument('--no-color', action='store_true', |
| help='whether to write output without color escape ' |
| 'codes.') |
| parser.add_argument('--output-to-log', action='store_true', |
| help='whether to write output to a log file') |
| args = parser.parse_args() |
| |
| job_context = JobContext(args) |
| |
| if args.output_to_log: |
| log_file = open(job_context.run_output_log_file, 'w') |
| sys.stdout = log_file |
| sys.stderr = log_file |
| |
| run = JobRun(args, job_context) |
| result = run.Run() |
| |
| if args.output_to_log: |
| log_file.close() |
| |
| return result |
| |
| |
| if __name__ == '__main__': |
| sys.exit(main()) |
| |
