tracing: Added a macro to report the metric values from the sdk to the tracing framework.

src/app/clusters/wifi-network-diagnostics-server/wifi-network-diagnostics-server.cpp

@@ -163,6 +163,7 @@ CHIP_ERROR WiFiDiagosticsAttrAccess::ReadWiFiRssi(AttributeValueEncoder & aEncod
     {
         rssi.SetNonNull(value);
         ChipLogProgress(Zcl, "The current RSSI of the Node’s Wi-Fi radio in dB: %d", value);
+        MATTER_TRACE_METRIC("wifi_rssi", value);
     }
     else
     {

src/tracing/backend.h

@@ -64,6 +64,7 @@ class Backend : public ::chip::IntrusiveListNodeBase<>
     virtual void TraceInstant(const char * label, const char * group) {}
 
     virtual void TraceCounter(const char * label) {}
+    virtual void TraceMetric(const char * label, int32_t value) {}
     virtual void LogMessageSend(MessageSendInfo &) { TraceInstant("MessageSent", "Messaging"); }
     virtual void LogMessageReceived(MessageReceivedInfo &) { TraceInstant("MessageReceived", "Messaging"); }
 

src/tracing/esp32_trace/esp32_tracing.cpp

@@ -153,6 +153,19 @@ void ESP32Backend::TraceCounter(const char * label)
 {
     ::Insights::ESPInsightsCounter::GetInstance(label)->ReportMetrics();
 }
+
+void ESP32Backend::TraceMetric(const char * label, int32_t value)
+{
+    if (!mRegistered)
+    {
+        esp_diag_metrics_register("SYS_MTR" /*Tag of metrics */, label /* Unique key 8 */, label /* label displayed on dashboard */,
+                                  "insights.mtr" /* hierarchical path */, ESP_DIAG_DATA_TYPE_INT /* data_type */);
+        mRegistered = true;
+    }
+    ESP_LOGI("mtr", "The value of %s is %ld ", label, value);
+    esp_diag_metrics_add_int(label, value);
+}
+
 void ESP32Backend::TraceBegin(const char * label, const char * group)
 {
     HashValue hashValue = MurmurHash(group);

src/tracing/esp32_trace/esp32_tracing.h

@@ -29,13 +29,17 @@ class ESP32Backend : public ::chip::Tracing::Backend
     void TraceInstant(const char * label, const char * group) override;
 
     void TraceCounter(const char * label) override;
+    void TraceMetric(const char * label, int32_t value) override;
 
     void LogMessageSend(MessageSendInfo &) override;
     void LogMessageReceived(MessageReceivedInfo &) override;
 
     void LogNodeLookup(NodeLookupInfo &) override;
     void LogNodeDiscovered(NodeDiscoveredInfo &) override;
     void LogNodeDiscoveryFailed(NodeDiscoveryFailedInfo &) override;
+
+private:
+    bool mRegistered = false;
 };
 
 } // namespace Insights

src/tracing/esp32_trace/include/matter/tracing/macros_impl.h

@@ -29,6 +29,7 @@
 #define MATTER_TRACE_END(label, group) ::chip::Tracing::Internal::End(label, group)
 #define MATTER_TRACE_INSTANT(label, group) ::chip::Tracing::Internal::Instant(label, group)
 #define MATTER_TRACE_COUNTER(label) ::chip::Tracing::Internal::Counter(label)
+#define MATTER_TRACE_METRIC(label, value) ::chip::Tracing::Internal::Metric(label, value)
 
 namespace chip {
 namespace Tracing {

src/tracing/json/json_tracing.cpp

@@ -295,6 +295,15 @@ void JsonBackend::TraceCounter(const char * label)
     OutputValue(value);
 }
 
+void JsonBackend::TraceMetric(const char * label, int32_t val)
+{
+    ::Json::Value value;
+    value["label"] = label;
+    value["value"] = val;
+
+    OutputValue(value);
+}
+
 void JsonBackend::LogMessageSend(MessageSendInfo & info)
 {
     ::Json::Value value;

src/tracing/json/json_tracing.h

@@ -52,6 +52,7 @@ class JsonBackend : public ::chip::Tracing::Backend
     void TraceEnd(const char * label, const char * group) override;
     void TraceInstant(const char * label, const char * group) override;
     void TraceCounter(const char * label) override;
+    void TraceMetric(const char * label, int32_t val) override;
     void LogMessageSend(MessageSendInfo &) override;
     void LogMessageReceived(MessageReceivedInfo &) override;
     void LogNodeLookup(NodeLookupInfo &) override;

src/tracing/macros.h

@@ -26,6 +26,14 @@
 //    MATTER_TRACE_END(label, group)
 //    MATTER_TRACE_INSTANT(label, group)
 //    MATTER_TRACE_SCOPE(label, group)
+
+// Tracing macro to trace monotonically increasing counter values.
+//  MATTER_TRACE_COUNTER(label)
+
+// Tracing macro to represent historical metric data i.e the data points which represent different
+// values at different point of time.
+//  MATTER_TRACE_METRIC(label, value)
+
 #include <matter/tracing/macros_impl.h>
 #include <tracing/log_declares.h>
 #include <tracing/registry.h>
@@ -79,6 +87,7 @@
 #define MATTER_TRACE_INSTANT(...) _MATTER_TRACE_DISABLE(__VA_ARGS__)
 #define MATTER_TRACE_SCOPE(...) _MATTER_TRACE_DISABLE(__VA_ARGS__)
 #define MATTER_TRACE_COUNTER(...) _MATTER_TRACE_DISABLE(__VA_ARGS__)
+#define MATTER_TRACE_METRIC(...) _MATTER_TRACE_DISABLE(__VA_ARGS__)
 
 #define MATTER_LOG_MESSAGE_SEND(...) _MATTER_TRACE_DISABLE(__VA_ARGS__)
 #define MATTER_LOG_MESSAGE_RECEIVED(...) _MATTER_TRACE_DISABLE(__VA_ARGS__)

src/tracing/multiplexed/include/matter/tracing/macros_impl.h

@@ -29,6 +29,7 @@
 #define MATTER_TRACE_END(label, group) ::chip::Tracing::Internal::End(label, group)
 #define MATTER_TRACE_INSTANT(label, group) ::chip::Tracing::Internal::Instant(label, group)
 #define MATTER_TRACE_COUNTER(label) ::chip::Tracing::Internal::Counter(label)
+#define MATTER_TRACE_METRIC(label, value) ::chip::Tracing::Internal::Metric(label, value)
 
 namespace chip {
 namespace Tracing {

src/tracing/none/include/matter/tracing/macros_impl.h

@@ -32,3 +32,4 @@
 #define MATTER_TRACE_INSTANT(...) _MATTER_TRACE_DISABLE(__VA_ARGS__)
 #define MATTER_TRACE_SCOPE(...) _MATTER_TRACE_DISABLE(__VA_ARGS__)
 #define MATTER_TRACE_COUNTER(...) _MATTER_TRACE_DISABLE(__VA_ARGS__)
+#define MATTER_TRACE_METRIC(...) _MATTER_TRACE_DISABLE(__VA_ARGS__)

src/tracing/perfetto/include/matter/tracing/macros_impl.h

@@ -37,3 +37,5 @@ PERFETTO_DEFINE_CATEGORIES(perfetto::Category("Matter").SetDescription("Matter t
         static int count##_label = 0;                                                                                              \
         TRACE_COUNTER("Matter", label, ++count##_label);                                                                           \
     } while (0)
+
+#define MATTER_TRACE_METRIC(label, value) TRACE_COUNTER("Matter", label, value)

src/tracing/registry.cpp

@@ -84,6 +84,14 @@ void Counter(const char * label)
     }
 }
 
+void Metric(const char * label, int32_t value)
+{
+    for (auto & backend : gTracingBackends)
+    {
+        backend.TraceMetric(label, value);
+    }
+}
+
 void LogMessageSend(::chip::Tracing::MessageSendInfo & info)
 {
     for (auto & backend : gTracingBackends)

src/tracing/registry.h

@@ -77,6 +77,7 @@ void Begin(const char * label, const char * group);
 void End(const char * label, const char * group);
 void Instant(const char * label, const char * group);
 void Counter(const char * label);
+void Metric(const char * label, int32_t value);
 
 void LogMessageSend(::chip::Tracing::MessageSendInfo & info);
 void LogMessageReceived(::chip::Tracing::MessageReceivedInfo & info);