[sairedis] Add knob to disable recording statistics API calls (sonic-net#547)

Author: kcudnik

lib/inc/sai_redis.h

@@ -65,6 +65,7 @@ extern volatile bool g_useTempView;
 extern volatile bool g_asicInitViewMode;
 extern volatile bool g_logrotate;
 extern volatile bool g_syncMode;
+extern volatile bool g_recordStats;
 
 extern sai_service_method_table_t                   g_services;
 extern std::shared_ptr<swss::ProducerTable>         g_asicState;

lib/inc/sairedis.h

@@ -111,6 +111,20 @@ typedef enum _sai_redis_switch_attr_t
      */
     SAI_REDIS_SWITCH_ATTR_SYNC_MODE,
 
+    /**
+     * @brief Record statistics counters API calls.
+     *
+     * Get statistic counters can be queried periodically and can produce a lot
+     * of logs in sairedis recording file. There are no OIDs retrieved in those
+     * APIs, so user can disable recording statistics calls by setting this
+     * attribute to false.
+     *
+     * @type bool
+     * @flags CREATE_AND_SET
+     * @default true
+     */
+    SAI_REDIS_SWITCH_ATTR_RECORD_STATS,
+
 } sai_redis_switch_attr_t;
 
 #endif // __SAIREDIS__

lib/src/sai_redis_generic_stats.cpp

@@ -1,6 +1,8 @@
 #include "sai_redis.h"
 #include "meta/sai_serialize.h"
 
+volatile bool g_recordStats = true;
+
 /*
  * Max number of counters used in 1 api call
  */
@@ -268,7 +270,7 @@ sai_status_t internal_redis_generic_get_stats(
 
     SWSS_LOG_DEBUG("generic get stats key: %s, fields: %lu", key.c_str(), entry.size());
 
-    if (g_record)
+    if (g_record && g_recordStats)
     {
         recordLine("m|" + key + "|" + joinFieldValues(entry));
     }
@@ -313,7 +315,7 @@ sai_status_t internal_redis_generic_get_stats(
                     counter_list,
                     kco);
 
-            if (g_record)
+            if (g_record && g_recordStats)
             {
                 const auto &str_status = kfvKey(kco);
                 const auto &values = kfvFieldsValues(kco);
@@ -331,7 +333,7 @@ sai_status_t internal_redis_generic_get_stats(
         break;
     }
 
-    if (g_record)
+    if (g_record && g_recordStats)
     {
         recordLine("M|SAI_STATUS_FAILURE");
     }
@@ -402,7 +404,7 @@ sai_status_t internal_redis_generic_clear_stats(
 
     SWSS_LOG_DEBUG("generic clear stats key: %s, fields: %lu", key.c_str(), fvTuples.size());
 
-    if (g_record)
+    if (g_record && g_recordStats)
     {
         recordLine("m|" + key + "|" + joinFieldValues(fvTuples));
     }
@@ -433,7 +435,7 @@ sai_status_t internal_redis_generic_clear_stats(
                 continue;
             }
 
-            if (g_record)
+            if (g_record && g_recordStats)
             {
                 const auto &respFvTuples = kfvFieldsValues(kco);
 
@@ -455,7 +457,7 @@ sai_status_t internal_redis_generic_clear_stats(
         break;
     }
 
-    if (g_record)
+    if (g_record && g_recordStats)
     {
         recordLine("M|SAI_STATUS_FAILURE");
     }

lib/src/sai_redis_switch.cpp

@@ -268,6 +268,10 @@ sai_status_t redis_set_switch_attribute(
                 g_useTempView = attr->value.booldata;
                 return SAI_STATUS_SUCCESS;
 
+            case SAI_REDIS_SWITCH_ATTR_RECORD_STATS:
+                g_recordStats = attr->value.booldata;
+                return SAI_STATUS_SUCCESS;
+
             case SAI_REDIS_SWITCH_ATTR_SYNC_MODE:
 
                 g_syncMode = attr->value.booldata;