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src/share/ob_task_define.cpp

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+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#include "ob_task_define.h"
+#include "lib/allocator/ob_malloc.h"
+#include "lib/utility/ob_simple_rate_limiter.h"
+#include "lib/oblog/ob_log.h"
+
+using namespace oceanbase::lib;
+using namespace oceanbase::common;
+
+namespace oceanbase {
+namespace share {
+
+class ObLogRateLimiter : public lib::ObSimpleRateLimiter {
+  friend class ObTaskController;
+
+  public:
+  bool is_force_allows() const override
+  {
+    return OB_UNLIKELY(allows_ > 0);
+  }
+  void reset_force_allows() override
+  {
+    if (is_force_allows()) {
+      allows_--;
+    }
+  }
+
+  private:
+  static RLOCAL(int64_t, allows_);
+};
+
+RLOCAL(int64_t, ObLogRateLimiter::allows_);
+
+// class ObTaskController
+ObTaskController ObTaskController::instance_;
+
+ObTaskController::ObTaskController() : limiters_(), rate_pctgs_(), log_rate_limit_(LOG_RATE_LIMIT)
+{}
+
+ObTaskController::~ObTaskController()
+{
+  destroy();
+}
+
+int ObTaskController::init()
+{
+  int ret = OB_SUCCESS;
+  for (int i = 0; OB_SUCC(ret) && i < MAX_TASK_ID; i++) {
+    limiters_[i] = OB_NEW(ObLogRateLimiter, ObModIds::OB_LOG);
+    if (nullptr == limiters_[i]) {
+      ret = OB_ALLOCATE_MEMORY_FAILED;
+      break;
+    }
+  }
+  if (OB_SUCC(ret)) {
+#define LOG_PCTG(ID, PCTG)          \
+  do {                              \
+    set_log_rate_pctg<ID>(PCTG);    \
+    get_limiter(ID)->set_name(#ID); \
+  } while (0)
+
+    // Set percentage of each task here.
+    // @NOTE: Inquire @ before any change.
+    LOG_PCTG(ObTaskType::GENERIC, 100.0);        // default limiter
+    LOG_PCTG(ObTaskType::USER_REQUEST, 100.0);   // default limiter
+    LOG_PCTG(ObTaskType::DATA_MAINTAIN, 100.0);  // default limiter
+    LOG_PCTG(ObTaskType::ROOT_SERVICE, 100.0);   // default limiter
+    LOG_PCTG(ObTaskType::SCHEMA, 100.0);         // default limiter
+
+#undef LOG_PCTG
+
+    calc_log_rate();
+    ObLogger::set_default_limiter(*limiters_[toUType(ObTaskType::GENERIC)]);
+    ObLogger::set_tl_type(0);
+  } else {
+    destroy();
+  }
+
+  return ret;
+}
+
+void ObTaskController::destroy()
+{
+  for (int i = 0; i < MAX_TASK_ID; i++) {
+    if (nullptr != limiters_[i]) {
+      ob_delete(limiters_[i]);
+      limiters_[i] = nullptr;
+    }
+  }
+}
+
+void ObTaskController::switch_task(ObTaskType task_id)
+{
+  ObLogger::set_tl_limiter(*limiters_[toUType(task_id)]);
+  ObLogger::set_tl_type(static_cast<int32_t>(toUType(task_id)));
+}
+
+void ObTaskController::allow_next_syslog(int64_t count)
+{
+  ObLogRateLimiter::allows_ += count;
+}
+
+void ObTaskController::set_log_rate_limit(int64_t limit)
+{
+  if (limit != log_rate_limit_) {
+    log_rate_limit_ = limit;
+    calc_log_rate();
+  }
+}
+
+void ObTaskController::calc_log_rate()
+{
+  const double total = std::accumulate(rate_pctgs_, rate_pctgs_ + MAX_TASK_ID, .0);
+  for (int i = 0; total != 0 && i < MAX_TASK_ID; i++) {
+    limiters_[i]->set_rate(static_cast<int64_t>(rate_pctgs_[i] / total * static_cast<double>(log_rate_limit_)));
+  }
+}
+
+ObTaskController& ObTaskController::get()
+{
+  return instance_;
+}
+
+}  // namespace share
+}  // namespace oceanbase