replacing probably unused engineSnifferHisto with new perf_trace

firmware/controllers/engine_cycle/main_trigger_callback.cpp

@@ -5,7 +5,7 @@
  * See http://rusefi.com/docs/html/
  *
  * @date Feb 7, 2013
- * @author Andrey Belomutskiy, (c) 2012-2018
+ * @author Andrey Belomutskiy, (c) 2012-2019
  *
  * This file is part of rusEfi - see http://rusefi.com
  *
@@ -612,9 +612,6 @@ void updatePrimeInjectionPulseState(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 static void showTriggerHistogram(void) {
 	printAllCallbacksHistogram();
 	showMainHistogram();
-#if EFI_ENGINE_SNIFFER
-	showWaveChartHistogram();
-#endif
 }
 
 static void showMainInfo(Engine *engine) {

firmware/development/engine_sniffer.cpp

@@ -34,15 +34,10 @@
 #include "engine_configuration.h"
 #include "eficonsole.h"
 #include "status_loop.h"
+#include "perf_trace.h"
 
 #define CHART_DELIMETER	'!'
 
-#if EFI_HISTOGRAMS
-#include "os_util.h"
-#include "histogram.h"
-static histogram_s engineSnifferHisto;
-#endif /* EFI_HISTOGRAMS */
-
 EXTERN_ENGINE
 ;
 extern uint32_t maxLockedDuration;
@@ -165,6 +160,8 @@ void WaveChart::publish() {
  * @brief	Register an event for digital sniffer
  */
 void WaveChart::addEvent3(const char *name, const char * msg) {
+	ScopePerf perf(PE::EngineSniffer);
+
 	if (getTimeNowNt() < pauseEngineSnifferUntilNt) {
 		return;
 	}
@@ -195,9 +192,6 @@ void WaveChart::addEvent3(const char *name, const char * msg) {
 		return;
 	}
 
-#if EFI_HISTOGRAMS && EFI_PROD_CODE
-	int beforeCallback = hal_lld_get_counter_value();
-#endif
 
 	efitick_t nowNt = getTimeNowNt();
 
@@ -238,22 +232,9 @@ void WaveChart::addEvent3(const char *name, const char * msg) {
 	if (!alreadyLocked) {
 		unlockOutputBuffer();
 	}
-
-#if EFI_HISTOGRAMS && EFI_PROD_CODE
-	int64_t diff = hal_lld_get_counter_value() - beforeCallback;
-	if (diff > 0) {
-		hsAdd(&engineSnifferHisto, diff);
-	}
-#endif /* EFI_HISTOGRAMS */
 #endif /* EFI_TEXT_LOGGING */
 }
 
-void showWaveChartHistogram(void) {
-#if EFI_HISTOGRAMS && EFI_PROD_CODE
-	printHistogram(&logger, &engineSnifferHisto);
-#endif
-}
-
 void initWaveChart(WaveChart *chart) {
 	/**
 	 * constructor does not work because we need specific initialization order

firmware/development/engine_sniffer.h

@@ -44,7 +44,6 @@ private:
 };
 
 void initWaveChart(WaveChart *chart);
-void showWaveChartHistogram(void);
 void setChartSize(int newSize);
 
 #endif /* EFI_ENGINE_SNIFFER */

firmware/development/perf_trace.h

@@ -57,6 +57,7 @@ enum class PE : uint8_t {
 	Temporary2,
 	Temporary3,
 	Temporary4,
+	EngineSniffer,
 	// enum_end_tag
 	// The tag above is consumed by PerfTraceTool.java
 	// please note that the tool requires a comma at the end of last value