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https://github.com/QingdaoU/OnlineJudge.git
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尝试使用更细粒度的数据库锁
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virusdefender
parent
ca44e8b978
commit
04ec3e956e
@ -17,20 +17,6 @@ class JudgeServer(models.Model):
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status = models.BooleanField(default=True)
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create_time = models.DateTimeField(auto_now_add=True, blank=True, null=True)
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def use_judge_instance(self):
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# 因为use 和 release 中间是判题时间，可能这个 model 的数据已经被修改了，所以不能直接使用self.xxx，否则取到的是旧数据
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server = JudgeServer.objects.select_for_update().get(id=self.id)
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server.left_instance_number -= 1
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server.workload = 100 - int(float(server.left_instance_number) / server.max_instance_number * 100)
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server.save()
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def release_judge_instance(self):
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# 使用原子操作
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server = JudgeServer.objects.select_for_update().get(id=self.id)
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server.left_instance_number += 1
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server.workload = 100 - int(float(server.left_instance_number) / server.max_instance_number * 100)
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server.save()
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class Meta:
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db_table = "judge_server"
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@ -38,25 +38,35 @@ class JudgeDispatcher(object):
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self.spj_version = spj_version
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def choose_judge_server(self):
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servers = JudgeServer.objects.filter(workload__lt=100, lock=False, status=True).order_by("-workload")
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if servers.exists():
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return servers.first()
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with transaction.atomic():
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servers = JudgeServer.objects.select_for_update().filter(workload__lt=100, lock=False, status=True).order_by("-workload")
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if servers.exists():
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server = servers.first()
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server.left_instance_number -= 1
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server.workload = 100 - int(float(server.left_instance_number) / server.max_instance_number * 100)
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server.save()
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return server
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def release_judge_instance(self, judge_server_id):
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with transaction.atomic():
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# 使用原子操作, 同时因为use和release中间间隔了判题过程,需要重新查询一下
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server = JudgeServer.objects.select_for_update().get(id=judge_server_id)
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server.left_instance_number += 1
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server.workload = 100 - int(float(server.left_instance_number) / server.max_instance_number * 100)
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server.save()
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def judge(self):
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self.submission.judge_start_time = int(time.time() * 1000)
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with transaction.atomic():
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judge_server = self.choose_judge_server()
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judge_server = self.choose_judge_server()
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# 如果没有合适的判题服务器，就放入等待队列中等待判题
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if not judge_server:
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JudgeWaitingQueue.objects.create(submission_id=self.submission.id, time_limit=self.time_limit,
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memory_limit=self.memory_limit, test_case_id=self.test_case_id,
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spj=self.spj, spj_language=self.spj_language, spj_code=self.spj_code,
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spj_version=self.spj_version)
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return
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judge_server.use_judge_instance()
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# 如果没有合适的判题服务器，就放入等待队列中等待判题
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if not judge_server:
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JudgeWaitingQueue.objects.create(submission_id=self.submission.id, time_limit=self.time_limit,
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memory_limit=self.memory_limit, test_case_id=self.test_case_id,
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spj=self.spj, spj_language=self.spj_language, spj_code=self.spj_code,
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spj_version=self.spj_version)
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return
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try:
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s = TimeoutServerProxy("http://" + judge_server.ip + ":" + str(judge_server.port),
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@ -82,8 +92,7 @@ class JudgeDispatcher(object):
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self.submission.result = result["system_error"]
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self.submission.info = str(e)
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finally:
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with transaction.atomic():
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judge_server.release_judge_instance()
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self.release_judge_instance(judge_server.id)
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self.submission.judge_end_time = int(time.time() * 1000)
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self.submission.save(update_fields=["judge_start_time", "result", "info", "accepted_answer_time", "judge_end_time"])
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@ -111,32 +120,32 @@ class JudgeDispatcher(object):
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spj_version=waiting_submission.spj_version)
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def update_problem_status(self):
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problem = Problem.objects.get(id=self.submission.problem_id)
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with transaction.atomic():
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problem = Problem.objects.select_for_update().get(id=self.submission.problem_id)
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# 更新普通题目的计数器
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problem.add_submission_number()
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# 更新普通题目的计数器
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problem.add_submission_number()
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# 更新用户做题状态
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user = User.objects.select_for_update().get(id=self.submission.user_id)
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# 更新用户做题状态
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user = User.objects.get(id=self.submission.user_id)
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problems_status = user.problems_status
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if "problems" not in problems_status:
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problems_status["problems"] = {}
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problems_status = user.problems_status
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if "problems" not in problems_status:
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problems_status["problems"] = {}
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# 增加用户提交计数器
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user.userprofile.add_submission_number()
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# 增加用户提交计数器
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user.userprofile.add_submission_number()
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# 之前状态不是ac, 现在是ac了 需要更新用户ac题目数量计数器,这里需要判重
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if problems_status["problems"].get(str(problem.id), -1) != 1 and self.submission.result == result["accepted"]:
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user.userprofile.add_accepted_problem_number()
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# 之前状态不是ac, 现在是ac了 需要更新用户ac题目数量计数器,这里需要判重
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if problems_status["problems"].get(str(problem.id), -1) != 1 and self.submission.result == result["accepted"]:
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user.userprofile.add_accepted_problem_number()
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if self.submission.result == result["accepted"]:
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problem.add_ac_number()
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problems_status["problems"][str(problem.id)] = 1
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else:
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problems_status["problems"][str(problem.id)] = 2
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user.problems_status = problems_status
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user.save(update_fields=["problem_status"])
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if self.submission.result == result["accepted"]:
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problem.add_ac_number()
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problems_status["problems"][str(problem.id)] = 1
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else:
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problems_status["problems"][str(problem.id)] = 2
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user.problems_status = problems_status
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user.save(update_fields=["problems_status"])
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# 普通题目的话，到这里就结束了
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def update_contest_problem_status(self):
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@ -146,31 +155,32 @@ class JudgeDispatcher(object):
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logger.info("Contest debug mode, id: " + str(contest.id) + ", submission id: " + self.submission.id)
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return
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contest_problem = ContestProblem.objects.get(contest=contest, id=self.submission.problem_id)
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contest_problem.add_submission_number()
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with transaction.atomic():
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contest_problem = ContestProblem.objects.select_for_update().get(contest=contest, id=self.submission.problem_id)
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contest_problem.add_submission_number()
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user = User.objects.get(id=self.submission.user_id)
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problems_status = user.problems_status
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user = User.objects.select_for_update().get(id=self.submission.user_id)
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problems_status = user.problems_status
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if "contest_problems" not in problems_status:
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problems_status["contest_problems"] = {}
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if "contest_problems" not in problems_status:
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problems_status["contest_problems"] = {}
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# 增加用户提交计数器
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user.userprofile.add_submission_number()
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# 增加用户提交计数器
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user.userprofile.add_submission_number()
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# 之前状态不是ac, 现在是ac了 需要更新用户ac题目数量计数器,这里需要判重
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if problems_status["contest_problems"].get(str(contest_problem.id), -1) != 1 and \
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self.submission.result == result["accepted"]:
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user.userprofile.add_accepted_problem_number()
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# 之前状态不是ac, 现在是ac了 需要更新用户ac题目数量计数器,这里需要判重
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if problems_status["contest_problems"].get(str(contest_problem.id), -1) != 1 and \
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self.submission.result == result["accepted"]:
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user.userprofile.add_accepted_problem_number()
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if self.submission.result == result["accepted"]:
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contest_problem.add_ac_number()
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problems_status["contest_problems"][str(contest_problem.id)] = 1
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else:
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problems_status["contest_problems"][str(contest_problem.id)] = 2
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if self.submission.result == result["accepted"]:
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contest_problem.add_ac_number()
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problems_status["contest_problems"][str(contest_problem.id)] = 1
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else:
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problems_status["contest_problems"][str(contest_problem.id)] = 2
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user.problems_status = problems_status
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user.save(update_fields=["problem_status"])
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user.problems_status = problems_status
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user.save(update_fields=["problems_status"])
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self.update_contest_rank(contest)
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