X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=lttv%2Flttv%2Fsync%2Fevent_analysis_linreg.c;h=2ceecf3e13eed80a850664e92b06f92ed0d49827;hb=fafb0a2998296c564cbc26c2c0fa5142b181b332;hp=8a7bd22777b977708e8065797e9f480fcd62c7c9;hpb=70407e861d8430dbe06cc52e6fe4ed5c9cd0872a;p=lttv.git

diff --git a/lttv/lttv/sync/event_analysis_linreg.c b/lttv/lttv/sync/event_analysis_linreg.c
index 8a7bd227..2ceecf3e 100644
--- a/lttv/lttv/sync/event_analysis_linreg.c
+++ b/lttv/lttv/sync/event_analysis_linreg.c
@@ -32,21 +32,18 @@
 #include "event_analysis_linreg.h"
 
 
-#ifndef g_info
-#define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format)
-#endif
-
-
 // Functions common to all analysis modules
 static void initAnalysisLinReg(SyncState* const syncState);
 static void destroyAnalysisLinReg(SyncState* const syncState);
 
-static void analyzeExchangeLinReg(SyncState* const syncState, Packet* const packet);
+static void analyzeExchangeLinReg(SyncState* const syncState, Exchange* const exchange);
 static GArray* finalizeAnalysisLinReg(SyncState* const syncState);
 static void printAnalysisStatsLinReg(SyncState* const syncState);
+static void writeAnalysisGraphsPlotsLinReg(SyncState* const syncState, const
+	unsigned int i, const unsigned int j);
 
 // Functions specific to this module
-static void registerAnalysisLinReg() __attribute__((constructor (101)));
+static void registerAnalysisLinReg() __attribute__((constructor (102)));
 
 static void finalizeLSA(SyncState* const syncState);
 static void doGraphProcessing(SyncState* const syncState);
@@ -69,10 +66,12 @@ static AnalysisModule analysisModuleLinReg= {
 	.name= "linreg",
 	.initAnalysis= &initAnalysisLinReg,
 	.destroyAnalysis= &destroyAnalysisLinReg,
-	.analyzePacket= NULL,
 	.analyzeExchange= &analyzeExchangeLinReg,
 	.finalizeAnalysis= &finalizeAnalysisLinReg,
 	.printAnalysisStats= &printAnalysisStatsLinReg,
+	.graphFunctions= {
+		.writeTraceTraceForePlots= &writeAnalysisGraphsPlotsLinReg,
+	}
 };
 
 
@@ -166,47 +165,38 @@ static void destroyAnalysisLinReg(SyncState* const syncState)
 /*
  * Perform analysis on a series of event pairs.
  *
- * If one event pair is a packet, an exchange is composed of at least two
- * packets, one in each direction. There should be a non-negative minimum
- * "round trip time" (RTT) between the first and last event of the exchange.
- * This RTT should be as small as possible so these packets should be closely
- * related in time like a data packet and an acknowledgement packet. If the
- * events analyzed are such that the minimum RTT can be zero, there's nothing
- * gained in analyzing exchanges beyond what can already be figured out by
- * analyzing packets.
- *
- * An exchange can also consist of more than two packets, in case one packet
- * single handedly acknowledges many data packets.
- *
  * Args:
  *   syncState     container for synchronization data
- *   packet        structure containing the many events
+ *   exchange      structure containing the many events
  */
-static void analyzeExchangeLinReg(SyncState* const syncState, Packet* const packet)
+static void analyzeExchangeLinReg(SyncState* const syncState, Exchange* const exchange)
 {
 	unsigned int ni, nj;
 	double dji, eji;
 	double timoy;
 	Fit* fit;
-	Packet* ackedPacket;
+	Message* ackedMessage;
 	AnalysisDataLinReg* analysisData;
 
 	g_debug("Synchronization calculation, ");
 	g_debug("%d acked packets - using last one, ",
-		g_queue_get_length(packet->acks));
+		g_queue_get_length(exchange->acks));
 
 	analysisData= (AnalysisDataLinReg*) syncState->analysisData;
-	ackedPacket= g_queue_peek_tail(packet->acks);
+	ackedMessage= g_queue_peek_tail(exchange->acks);
 
 	// Calculate the intermediate values for the
 	// least-squares analysis
-	dji= ((double) ackedPacket->inE->tsc - (double) ackedPacket->outE->tsc +
-		(double) packet->outE->tsc - (double) packet->inE->tsc) / 2;
-	eji= fabs((double) ackedPacket->inE->tsc - (double) ackedPacket->outE->tsc
-		- (double) packet->outE->tsc + (double) packet->inE->tsc) / 2;
-	timoy= ((double) ackedPacket->outE->tsc + (double) packet->inE->tsc) / 2;
-	ni= ackedPacket->outE->traceNum;
-	nj= ackedPacket->inE->traceNum;
+	dji= ((double) ackedMessage->inE->cpuTime - (double) ackedMessage->outE->cpuTime
+		+ (double) exchange->message->outE->cpuTime - (double)
+		exchange->message->inE->cpuTime) / 2;
+	eji= fabs((double) ackedMessage->inE->cpuTime - (double)
+		ackedMessage->outE->cpuTime - (double) exchange->message->outE->cpuTime +
+		(double) exchange->message->inE->cpuTime) / 2;
+	timoy= ((double) ackedMessage->outE->cpuTime + (double)
+		exchange->message->inE->cpuTime) / 2;
+	ni= ackedMessage->outE->traceNum;
+	nj= ackedMessage->inE->traceNum;
 	fit= &analysisData->fitArray[nj][ni];
 
 	fit->n++;
@@ -483,6 +473,7 @@ static GArray* calculateFactors(SyncState* const syncState)
 	analysisData= (AnalysisDataLinReg*) syncState->analysisData;
 	factors= g_array_sized_new(FALSE, FALSE, sizeof(Factors),
 		syncState->traceNb);
+	g_array_set_size(factors, syncState->traceNb);
 
 	// Calculate the resulting offset and drift between each trace and its
 	// reference
@@ -743,3 +734,27 @@ static gint gcfGraphTraceCompare(gconstpointer a, gconstpointer b)
 	}
 }
 
+
+/*
+ * Write the analysis-specific graph lines in the gnuplot script.
+ *
+ * Args:
+ *   syncState:    container for synchronization data
+ *   i:            first trace number, on the x axis
+ *   j:            second trace number, garanteed to be larger than i
+ */
+void writeAnalysisGraphsPlotsLinReg(SyncState* const syncState, const unsigned
+	int i, const unsigned int j)
+{
+	AnalysisDataLinReg* analysisData;
+	Fit* fit;
+
+	analysisData= (AnalysisDataLinReg*) syncState->analysisData;
+	fit= &analysisData->fitArray[j][i];
+
+	fprintf(syncState->graphsStream,
+		"\t%7g + %7g * x "
+		"title \"Linreg conversion\" with lines "
+		"linecolor rgb \"gray60\" linetype 1, \\\n",
+		fit->d0, 1. + fit->x);
+}