Set the correction factors in the sync_chain

[lttv.git] / lttv / lttv / sync / event_processing_lttng_standard.c

diff --git a/lttv/lttv/sync/event_processing_lttng_standard.c b/lttv/lttv/sync/event_processing_lttng_standard.c
index 99086fe5e68a7ec5b6f72e468750862574d821d2..02354043f78e8aa272017da8e01441794fc874b6 100644 (file)
--- a/lttv/lttv/sync/event_processing_lttng_standard.c
+++ b/lttv/lttv/sync/event_processing_lttng_standard.c
@@ -15,13 +15,10 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#define _ISOC99_SOURCE
-
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
 
-#include <math.h>
 #include <netinet/in.h>
 #include <stdarg.h>
 #include <stdint.h>
@@ -43,7 +40,7 @@
 static void initProcessingLTTVStandard(SyncState* const syncState, ...);
 static void destroyProcessingLTTVStandard(SyncState* const syncState);
 
-static void finalizeProcessingLTTVStandard(SyncState* const syncState);
+static GArray* finalizeProcessingLTTVStandard(SyncState* const syncState);
 static void printProcessingStatsLTTVStandard(SyncState* const syncState);
 static void writeProcessingGraphVariablesLTTVStandard(SyncState* const
        syncState, const unsigned int i);
@@ -166,83 +163,19 @@ static void initProcessingLTTVStandard(SyncState* const syncState, ...)
  *
  * Args:
  *   syncState     container for synchronization data.
+ *
+ * Returns:
+ *   Factors[traceNb] synchronization factors for each trace
  */
-static void finalizeProcessingLTTVStandard(SyncState* const syncState)
+static GArray* finalizeProcessingLTTVStandard(SyncState* const syncState)
 {
-       unsigned int i;
-       GArray* factors;
-       double minOffset, minDrift;
-       unsigned int refFreqTrace;
        ProcessingDataLTTVStandard* processingData;
 
        processingData= (ProcessingDataLTTVStandard*) syncState->processingData;
 
        partialDestroyProcessingLTTVStandard(syncState);
 
-       factors= syncState->matchingModule->finalizeMatching(syncState);
-
-       /* The offsets are adjusted so the lowest one is 0. This is done because
-        * of a Lttv specific limitation: events cannot have negative times. By
-        * having non-negative offsets, events cannot be moved backwards to
-        * negative times.
-        */
-       minOffset= 0;
-       for (i= 0; i < syncState->traceNb; i++)
-       {
-               minOffset= MIN(g_array_index(factors, Factors, i).offset, minOffset);
-       }
-
-       for (i= 0; i < syncState->traceNb; i++)
-       {
-               g_array_index(factors, Factors, i).offset-= minOffset;
-       }
-
-       /* Because the timestamps are corrected at the TSC level (not at the
-        * LttTime level) all trace frequencies must be made equal. We choose to
-        * use the frequency of the system with the lowest drift
-        */
-       minDrift= INFINITY;
-       refFreqTrace= 0;
-       for (i= 0; i < syncState->traceNb; i++)
-       {
-               if (g_array_index(factors, Factors, i).drift < minDrift)
-               {
-                       minDrift= g_array_index(factors, Factors, i).drift;
-                       refFreqTrace= i;
-               }
-       }
-       g_assert(syncState->traceNb == 0 || minDrift != INFINITY);
-
-       // Write the factors to the LttTrace structures
-       for (i= 0; i < syncState->traceNb; i++)
-       {
-               LttTrace* t;
-               Factors* traceFactors;
-
-               t= processingData->traceSetContext->traces[i]->t;
-               traceFactors= &g_array_index(factors, Factors, i);
-
-               t->drift= traceFactors->drift;
-               t->offset= traceFactors->offset;
-               t->start_freq=
-                       processingData->traceSetContext->traces[refFreqTrace]->t->start_freq;
-               t->freq_scale=
-                       processingData->traceSetContext->traces[refFreqTrace]->t->freq_scale;
-               t->start_time_from_tsc =
-                       ltt_time_from_uint64(tsc_to_uint64(t->freq_scale, t->start_freq,
-                                       t->drift * t->start_tsc + t->offset));
-       }
-
-       g_array_free(factors, TRUE);
-
-       lttv_traceset_context_compute_time_span(processingData->traceSetContext,
-               &processingData->traceSetContext->time_span);
-
-       g_debug("traceset start %ld.%09ld end %ld.%09ld",
-               processingData->traceSetContext->time_span.start_time.tv_sec,
-               processingData->traceSetContext->time_span.start_time.tv_nsec,
-               processingData->traceSetContext->time_span.end_time.tv_sec,
-               processingData->traceSetContext->time_span.end_time.tv_nsec);
+       return syncState->matchingModule->finalizeMatching(syncState);
 }