add system config (l1/l2/l3 cache size) to utility

deps/oblib/src/lib/utility/utility.cpp

@@ -1940,5 +1940,54 @@ int is_dir_empty(const char *dirname, bool &is_empty)
   return ret;
 }
 
+static int64_t get_cpu_cache_size(int sysconf_name, const char *sysfs_path, int64_t default_value)
+{
+  int64_t cache_size = sysconf(sysconf_name);
+  if (OB_UNLIKELY(cache_size <= 0)) {
+    FILE *file = nullptr;
+    file = fopen(sysfs_path, "r");
+    if (file) {
+      fscanf(file, "%ld", &cache_size);
+      fclose(file);
+      cache_size *= 1024;
+    }
+    if (OB_UNLIKELY(nullptr == file || cache_size <= 0)) {
+      int ret = OB_ERR_UNEXPECTED;
+      COMMON_LOG(ERROR, "failed to read cpu cache size in file", KP(file), K(cache_size));
+      cache_size = default_value;
+    }
+  }
+  return cache_size;
+}
+
+int64_t get_level1_dcache_size()
+{
+  const char *path = "/sys/devices/system/cpu/cpu0/cache/index0/size";
+  static int64_t l1_dcache_size = get_cpu_cache_size(_SC_LEVEL1_DCACHE_SIZE, path, 32768/*default L1 dcache size : 32K*/);
+  return l1_dcache_size;
+}
+
+int64_t get_level1_icache_size()
+{
+  const char *path = "/sys/devices/system/cpu/cpu0/cache/index1/size";
+  static int64_t l1_icache_size = get_cpu_cache_size(_SC_LEVEL1_ICACHE_SIZE, path, 32768/*default L1 icache size : 32K*/);
+  return l1_icache_size;
+}
+
+int64_t get_level2_cache_size()
+{
+  const char *path = "/sys/devices/system/cpu/cpu0/cache/index2/size";
+  static int64_t l2_cache_size = get_cpu_cache_size(_SC_LEVEL2_CACHE_SIZE, path, 524288/*default L2 cache size : 512K*/);
+  return l2_cache_size;
+}
+
+int64_t get_level3_cache_size()
+{
+  const char *path = "/sys/devices/system/cpu/cpu0/cache/index3/size";
+  static int64_t l3_cache_size = get_cpu_cache_size(_SC_LEVEL3_CACHE_SIZE, path, 8388608/*default L3 cache size : 8192K*/);
+  return l3_cache_size;
+}
+
+
 } // end namespace common
 } // end namespace oceanbase

deps/oblib/src/lib/utility/utility.h

@@ -508,6 +508,14 @@ inline int64_t get_phy_mem_size()
   return page_size * phys_pages;
 }
 
+int64_t get_level1_dcache_size();
+
+int64_t get_level1_icache_size();
+
+int64_t get_level2_cache_size();
+
+int64_t get_level3_cache_size();
+
 inline bool is_cpu_support_sse42()
 {
  #if defined (__x86_64__)

src/sql/engine/aggregate/ob_adaptive_bypass_ctrl.h

@@ -21,8 +21,8 @@ namespace oceanbase
 namespace sql
 {
 
-const int64_t INIT_L2_CACHE_SIZE = sysconf(_SC_LEVEL2_CACHE_SIZE);
-const int64_t INIT_L3_CACHE_SIZE = sysconf(_SC_LEVEL3_CACHE_SIZE);
+const int64_t INIT_L2_CACHE_SIZE = get_level2_cache_size();
+const int64_t INIT_L3_CACHE_SIZE = get_level3_cache_size();
 const int64_t MAX_L3_CACHE_SIZE = 50 *1024 *1024; //50M
 const uint64_t FORCE_GPD = 0x100;
 const int64_t MAX_REBUILD_TIMES = 5;

src/sql/engine/join/ob_hash_join_op.h

@@ -21,6 +21,7 @@
 #include "lib/container/ob_2d_array.h"
 #include "sql/engine/aggregate/ob_exec_hash_struct.h"
 #include "lib/lock/ob_scond.h"
+#include "sql/engine/aggregate/ob_adaptive_bypass_ctrl.h"
 
 namespace oceanbase
 {
@@ -1108,7 +1109,6 @@ private:
   static const int64_t CACHE_AWARE_PART_CNT = 128;
   static const int64_t BATCH_RESULT_SIZE = 512;
   static const int64_t INIT_LTB_SIZE = 64;
-  static const int64_t INIT_L2_CACHE_SIZE = 1 * 1024 * 1024; // 1M
   static const int64_t MIN_PART_COUNT = 8;
   static const int64_t PAGE_SIZE = ObChunkDatumStore::BLOCK_SIZE;
   static const int64_t MIN_MEM_SIZE = (MIN_PART_COUNT + 1) * PAGE_SIZE;