optimize get term

ehds · Feb 27, 2024 · b1dc17f · b1dc17f
1 parent b37c610
commit b1dc17f
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Showing 3 changed files with 13 additions and 6 deletions.
diff --git a/src/braft/log_manager.cpp b/src/braft/log_manager.cpp
@@ -132,7 +132,7 @@ void LogManager::clear_memory_logs(const LogId& id) {
             while (!_logs_in_memory.empty() 
                     && nentries < ARRAY_SIZE(entries_to_clear)) {
                 LogEntry* entry = _logs_in_memory.front();
-                if (entry->id > id) {
+                if (entry->id >= id) {
                     break;
                 }
                 entries_to_clear[nentries++] = entry;

diff --git a/src/braft/log_manager.h b/src/braft/log_manager.h
@@ -184,7 +184,7 @@ friend class AppendBatcher;
 
     void unsafe_truncate_suffix(const int64_t last_index_kept);
 
-    // Clear the logs in memory whose id <= the given |id|
+    // Clear the logs in memory whose id < the given |id|
     void clear_memory_logs(const LogId& id);
 
     int64_t unsafe_get_term(const int64_t index);

diff --git a/test/test_log_manager.cpp b/test/test_log_manager.cpp
@@ -110,10 +110,12 @@ TEST_F(LogManagerTest, get_should_be_ok_when_disk_thread_stucks) {
     lm->clear_memory_logs(braft::LogId(N, 1));
     // After clear all the memory logs, all the saved entries should have no
     // other reference
-    for (size_t i = 0; i < N; ++i) {
+    for (size_t i = 0; i < N - 1; ++i) {
         ASSERT_EQ(1u, saved_entries[i]->ref_count_);
         saved_entries[i]->Release();
     }
+    ASSERT_EQ(2u, saved_entries[N-1]->ref_count_);
+    saved_entries[N - 1]->Release();
 }
 
 TEST_F(LogManagerTest, configuration_changes) {
@@ -165,10 +167,12 @@ TEST_F(LogManagerTest, configuration_changes) {
     lm->clear_memory_logs(braft::LogId(N, 1));
     // After clear all the memory logs, all the saved entries should have no
     // other reference
-    for (size_t i = 0; i < N; ++i) {
+    for (size_t i = 0; i < N - 1; ++i) {
         ASSERT_EQ(1u, saved_entries[i]->ref_count_) << "i=" << i;
         saved_entries[i]->Release();
     }
+    ASSERT_EQ(2u, saved_entries[N-1]->ref_count_);
+    saved_entries[N - 1]->Release();
 }
 
 TEST_F(LogManagerTest, truncate_suffix_also_revert_configuration) {
@@ -321,8 +325,11 @@ TEST_F(LogManagerTest, append_with_the_same_index) {
     for (size_t i = 0; i < N; ++i) {
         ASSERT_EQ(1u, saved_entries0[i]->ref_count_);
         ASSERT_EQ(1u, saved_entries1[i]->ref_count_);
-        ASSERT_EQ(1u, saved_entries2[i]->ref_count_);
+        if (i != N - 1) {
+            ASSERT_EQ(1u, saved_entries2[i]->ref_count_);
+        }
     }
+    ASSERT_EQ(2u, saved_entries2[N-1]->ref_count_);
 
     for (size_t i = 0; i < N; ++i) {
         braft::LogEntry* entry = lm->get_entry(i + 1);
@@ -465,7 +472,7 @@ TEST_F(LogManagerTest, pipelined_append) {
     ASSERT_EQ(N * 2, lm->_logs_in_memory.size());
 
     lm->set_applied_id(braft::LogId(N * 2, 2));
-    ASSERT_EQ(0u, lm->_logs_in_memory.size())
+    ASSERT_EQ(1u, lm->_logs_in_memory.size())
          << "last_log_id=" << lm->last_log_id(true);
 
     // We can still get the right data from storage