gavinchou commented on code in PR #64381:
URL: https://github.com/apache/doris/pull/64381#discussion_r3880601627
##########
be/src/io/cache/lru_queue_recorder.cpp:
##########
@@ -137,4 +169,34 @@ void
LRUQueueRecorder::reset_lru_queue_update_cnt_from_last_dump(FileCacheType t
_lru_queue_update_cnt_from_last_dump[type] = 0;
}
+size_t LRUQueueRecorder::lru_log_queue_size(FileCacheType type) const {
+ return
_lru_log_queue_size[file_cache_type_index(type)].load(std::memory_order_relaxed);
+}
+
+bool LRUQueueRecorder::reserve_lru_log_queue_slot(FileCacheType type) {
+ int64_t queue_limit = config::file_cache_background_lru_log_queue_max_size;
+ if (queue_limit <= 0) {
+ return false;
+ }
+ auto& queue_size = _lru_log_queue_size[file_cache_type_index(type)];
+ size_t cur_size = queue_size.load(std::memory_order_relaxed);
+ while (cur_size < static_cast<size_t>(queue_limit)) {
+ if (queue_size.compare_exchange_weak(cur_size, cur_size + 1,
std::memory_order_relaxed)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+void LRUQueueRecorder::release_lru_log_queue_slot(FileCacheType type) {
+ auto& queue_size = _lru_log_queue_size[file_cache_type_index(type)];
+ size_t cur_size = queue_size.load(std::memory_order_relaxed);
+ while (true) {
+ DORIS_CHECK_GT(cur_size, 0);
+ if (queue_size.compare_exchange_weak(cur_size, cur_size - 1,
std::memory_order_relaxed)) {
+ return;
+ }
Review Comment:
queue_size.fetch_sub(1)
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