Implement batch scheduling bridge call; fixes DMOJ#1318

judge/admin/contest.py

@@ -14,7 +14,7 @@
 from reversion.admin import VersionAdmin
 
 from django_ace import AceWidget
-from judge.models import Class, Contest, ContestProblem, ContestSubmission, Profile, Rating, Submission
+from judge.models import Class, Contest, ContestProblem, Profile, Rating, Submission
 from judge.ratings import rate_contest
 from judge.utils.views import NoBatchDeleteMixin
 from judge.widgets import AdminHeavySelect2MultipleWidget, AdminHeavySelect2Widget, AdminMartorWidget, \
@@ -274,13 +274,13 @@ def get_urls(self):
         ] + super(ContestAdmin, self).get_urls()
 
     def rejudge_view(self, request, contest_id, problem_id):
-        queryset = ContestSubmission.objects.filter(problem_id=problem_id).select_related('submission')
-        for model in queryset:
-            model.submission.judge(rejudge=True, rejudge_user=request.user)
+        judged = sum(Submission.batch_judge(
+            Submission.objects.filter(contest__problem_id=problem_id), rejudge=True, rejudge_user=request.user,
+        ))
 
         self.message_user(request, ngettext('%d submission was successfully scheduled for rejudging.',
                                             '%d submissions were successfully scheduled for rejudging.',
-                                            len(queryset)) % len(queryset))
+                                            judged) % judged)
         return HttpResponseRedirect(reverse('admin:judge_contest_change', args=(contest_id,)))
 
     def rate_all_view(self, request):

judge/admin/submission.py

@@ -160,7 +160,6 @@ def judge(self, request, queryset):
             self.message_user(request, gettext('You do not have the permission to rejudge submissions.'),
                               level=messages.ERROR)
             return
-        queryset = queryset.order_by('id')
         if not request.user.has_perm('judge.rejudge_submission_lot') and \
                 queryset.count() > settings.DMOJ_SUBMISSIONS_REJUDGE_LIMIT:
             self.message_user(request, gettext('You do not have the permission to rejudge THAT many submissions.'),
@@ -169,9 +168,8 @@ def judge(self, request, queryset):
         if not request.user.has_perm('judge.edit_all_problem'):
             id = request.profile.id
             queryset = queryset.filter(Q(problem__authors__id=id) | Q(problem__curators__id=id))
-        judged = len(queryset)
-        for model in queryset:
-            model.judge(rejudge=True, batch_rejudge=True, rejudge_user=request.user)
+
+        judged = sum(Submission.batch_judge(queryset, rejudge=True, rejudge_user=request.user))
         self.message_user(request, ngettext('%d submission was successfully scheduled for rejudging.',
                                             '%d submissions were successfully scheduled for rejudging.',
                                             judged) % judged)

judge/bridge/django_handler.py

@@ -14,6 +14,7 @@ def __init__(self, request, client_address, server, judges):
 
         self.handlers = {
             'submission-request': self.on_submission,
+            'batch-submission-request': self.on_batch_submission,
             'terminate-submission': self.on_termination,
             'disconnect-judge': self.on_disconnect_request,
         }
@@ -44,6 +45,23 @@ def on_submission(self, data):
         self.judges.judge(id, problem, language, source, judge_id, priority)
         return {'name': 'submission-received', 'submission-id': id}
 
+    def on_batch_submission(self, data):
+        ids = []
+        judge_id = data['judge-id']
+        priority = data['priority']
+        if not self.judges.check_priority(priority):
+            return {'name': 'bad-request'}
+
+        for submission in data['submissions']:
+            id = submission['submission-id']
+            problem = submission['problem-id']
+            language = submission['language']
+            source = submission['source']
+            self.judges.judge(id, problem, language, source, judge_id, priority)
+            ids.append(id)
+
+        return {'name': 'submissions-received', 'submission-ids': ids}
+
     def on_termination(self, data):
         return {'name': 'submission-received', 'judge-aborted': self.judges.abort(data['submission-id'])}
 

judge/judgeapi.py

@@ -3,8 +3,12 @@
 import socket
 import struct
 import zlib
+from operator import attrgetter
 
 from django.conf import settings
+from django.db import transaction
+from django.db.models import BooleanField, F, OuterRef, Subquery
+from django.db.models.functions import Coalesce
 from django.utils import timezone
 
 from judge import event_poster as event
@@ -50,11 +54,11 @@ def judge_request(packet, reply=True):
         return result
 
 
-def judge_submission(submission, rejudge=False, batch_rejudge=False, judge_id=None):
+def judge_submission(submission, rejudge=False, judge_id=None):
     from .models import ContestSubmission, Submission, SubmissionTestCase
 
     updates = {'time': None, 'memory': None, 'points': None, 'result': None, 'case_points': 0, 'case_total': 0,
-               'error': None, 'rejudged_date': timezone.now() if rejudge or batch_rejudge else None, 'status': 'QU'}
+               'error': None, 'rejudged_date': timezone.now() if rejudge else None, 'status': 'QU'}
     try:
         # This is set proactively; it might get unset in judgecallback's on_grading_begin if the problem doesn't
         # actually have pretests stored on the judge.
@@ -86,7 +90,7 @@ def judge_submission(submission, rejudge=False, batch_rejudge=False, judge_id=No
             'language': submission.language.key,
             'source': submission.source.source,
             'judge-id': judge_id,
-            'priority': BATCH_REJUDGE_PRIORITY if batch_rejudge else (REJUDGE_PRIORITY if rejudge else priority),
+            'priority': REJUDGE_PRIORITY if rejudge else priority,
         })
     except BaseException:
         logger.exception('Failed to send request to judge')
@@ -100,6 +104,65 @@ def judge_submission(submission, rejudge=False, batch_rejudge=False, judge_id=No
     return success
 
 
+def batch_judge_submission(submissions, rejudge=False, judge_id=None):
+    from .models import Submission, SubmissionTestCase
+    updates = {
+        'time': None, 'memory': None, 'points': None, 'result': None, 'case_points': 0, 'case_total': 0,
+        'error': None, 'rejudged_date': timezone.now() if rejudge else None, 'status': 'QU',
+        'is_pretested': Coalesce(
+            Subquery(
+                Submission.objects.filter(pk=OuterRef('pk'))
+                .annotate(pretested=F('contest_object__run_pretests_only').bitand(F('contest__problem__is_pretested')))
+                .values_list('pretested')[:1],
+                output_field=BooleanField(),
+            ),
+            False,
+        ),
+    }
+
+    with transaction.atomic():
+        submission_queryset = Submission.objects.filter(id__in=map(attrgetter('id'), submissions)) \
+                                                .exclude(status__in=('P', 'G'))
+        submission_queryset.update(**updates)
+
+        ids = set(submission_queryset.values_list('id', flat=True))
+        # Do the filtering using the new set of IDs rather than submission_queryset
+        # because submission_queryset itself takes a list of IDs anyways.
+        SubmissionTestCase.objects.filter(submission_id__in=ids).delete()
+
+    submissions = [submission for submission in submissions if submission.id in ids]
+
+    try:
+        response = judge_request({
+            'name': 'batch-submission-request',
+            'submissions': [{
+                'submission-id': submission.id,
+                'problem-id': submission.problem.code,
+                'language': submission.language.key,
+                'source': submission.source.source,
+            } for submission in submissions],
+            'judge-id': judge_id,
+            # This is technically incorrect when rejudge is False.
+            # Some submissions might be contest submissions and should have priority "CONTEST_SUBMISSION_PRIORITY".
+            # It's not worth further complicating this code by separating contest submissions and
+            # normal submissions as that case is not even being used.
+            # For the moment, let's just set all submissions to have "DEFAULT_PRIORITY" if we're not rejudging.
+            'priority': BATCH_REJUDGE_PRIORITY if rejudge else DEFAULT_PRIORITY,
+        })
+    except BaseException:
+        logger.exception('Failed to send request to judge')
+        processed_ids = set()
+    else:
+        processed_ids = set(response['submission-ids']) if 'submission-ids' in response else set()
+
+    if processed_ids != ids:
+        Submission.objects.filter(id__in=ids - processed_ids).update(status='IE', result='IE', error='')
+
+    for submission in submissions:
+        # If the submission is not in processed_ids, that means the submission IE'd and thus is "done" judging.
+        _post_update_submission(submission, done=submission.id not in processed_ids)
+
+
 def disconnect_judge(judge, force=False):
     judge_request({'name': 'disconnect-judge', 'judge-id': judge.name, 'force': force}, reply=False)
 

judge/models/submission.py

@@ -3,17 +3,18 @@
 
 from django.conf import settings
 from django.core.exceptions import ObjectDoesNotExist
-from django.db import models
+from django.db import models, transaction
 from django.urls import reverse
 from django.utils import timezone
 from django.utils.functional import cached_property
 from django.utils.translation import gettext_lazy as _
 from reversion import revisions
 
-from judge.judgeapi import abort_submission, judge_submission
+from judge.judgeapi import abort_submission, batch_judge_submission, judge_submission
 from judge.models.problem import Problem, SubmissionSourceAccess, TranslatedProblemForeignKeyQuerySet
 from judge.models.profile import Profile
 from judge.models.runtime import Language
+from judge.utils.iterator import chunk
 from judge.utils.unicode import utf8bytes
 
 __all__ = ['SUBMISSION_RESULT', 'Submission', 'SubmissionSource', 'SubmissionTestCase']
@@ -121,18 +122,41 @@ def long_status(self):
     def is_locked(self):
         return self.locked_after is not None and self.locked_after < timezone.now()
 
-    def judge(self, *args, rejudge=False, force_judge=False, rejudge_user=None, **kwargs):
+    def judge(self, *, rejudge=False, force_judge=False, rejudge_user=None, **kwargs):
         if force_judge or not self.is_locked:
             if rejudge:
                 with revisions.create_revision(manage_manually=True):
                     if rejudge_user:
                         revisions.set_user(rejudge_user)
                     revisions.set_comment('Rejudged')
                     revisions.add_to_revision(self)
-            judge_submission(self, *args, rejudge=rejudge, **kwargs)
+            judge_submission(self, rejudge=rejudge, **kwargs)
 
     judge.alters_data = True
 
+    @classmethod
+    def batch_judge(cls, submissions, *, rejudge=False, force_judge=False, rejudge_user=None, chunk_size=100, **kwargs):
+        # Don't trust the caller to follow related objects that we need.
+        submissions = submissions.select_related('problem', 'language', 'source')
+
+        if not force_judge:
+            submissions = submissions.exclude(locked_after__lt=timezone.now())
+
+        for current_chunk in chunk(submissions.iterator(chunk_size=chunk_size), chunk_size):
+            if rejudge:
+                with transaction.atomic():
+                    for submission in current_chunk:
+                        with revisions.create_revision(manage_manually=True):
+                            if rejudge_user:
+                                revisions.set_user(rejudge_user)
+                            revisions.set_comment('Rejudged')
+                            revisions.add_to_revision(submission)
+
+            batch_judge_submission(current_chunk, rejudge=rejudge, **kwargs)
+            yield len(current_chunk)
+
+    batch_judge.alters_data = True
+
     def abort(self):
         abort_submission(self)
 

judge/tasks/submission.py

@@ -31,11 +31,9 @@ def rejudge_problem_filter(self, problem_id, id_range=None, languages=None, resu
 
     rejudged = 0
     with Progress(self, queryset.count()) as p:
-        for submission in queryset.iterator():
-            submission.judge(rejudge=True, batch_rejudge=True, rejudge_user=user)
-            rejudged += 1
-            if rejudged % 10 == 0:
-                p.done = rejudged
+        for completed in Submission.batch_judge(queryset, rejudge=True, rejudge_user=user):
+            p.did(completed)
+            rejudged += completed
     return rejudged