* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#define _ISOC99_SOURCE
+
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <errno.h>
#include <fcntl.h>
+#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/resource.h>
#include "event_analysis_chull.h"
#include "event_analysis_linreg.h"
#include "event_analysis_eval.h"
+#include "factor_reduction_accuracy.h"
#include "sync_chain.h"
#include "sync_chain_lttv.h"
.hasArg= REQUIRED_ARG,
.optionHelp= "specify the algorithm to use for event analysis",
};
+static GString* reductionModulesNames;
+static ModuleOption optionSyncReduction= {
+ .longName= "sync-reduction",
+ .hasArg= REQUIRED_ARG,
+ .optionHelp= "specify the algorithm to use for factor reduction",
+};
static ModuleOption optionSyncGraphs= {
.longName= "sync-graphs",
.hasArg= NO_ARG,
static void init()
{
int retval;
+ unsigned int i;
+ const struct
+ {
+ GQueue* modules;
+ ModuleOption* option;
+ size_t nameOffset;
+ GString** names;
+ void (*gfAppendName)(gpointer data, gpointer user_data);
+ } loopValues[]= {
+ {&analysisModules, &optionSyncAnalysis, offsetof(AnalysisModule,
+ name), &analysisModulesNames, &gfAppendAnalysisName},
+ {&reductionModules, &optionSyncReduction, offsetof(ReductionModule,
+ name), &reductionModulesNames, &gfAppendReductionName},
+ };
g_debug("Sync init");
registerAnalysisLinReg();
registerAnalysisEval();
- g_assert(g_queue_get_length(&analysisModules) > 0);
- optionSyncAnalysis.arg= ((AnalysisModule*)
- g_queue_peek_head(&analysisModules))->name;
- analysisModulesNames= g_string_new("");
- g_queue_foreach(&analysisModules, &gfAppendAnalysisName,
- analysisModulesNames);
- // remove the last ", "
- g_string_truncate(analysisModulesNames, analysisModulesNames->len - 2);
- optionSyncAnalysis.argHelp= analysisModulesNames->str;
+ registerReductionAccuracy();
+
+ // Build module names lists for option and help string
+ for (i= 0; i < ARRAY_SIZE(loopValues); i++)
+ {
+ g_assert(g_queue_get_length(loopValues[i].modules) > 0);
+ loopValues[i].option->arg= (char*)(*(void**)
+ g_queue_peek_head(loopValues[i].modules) +
+ loopValues[i].nameOffset);
+ *loopValues[i].names= g_string_new("");
+ g_queue_foreach(loopValues[i].modules, loopValues[i].gfAppendName,
+ *loopValues[i].names);
+ // remove the last ", "
+ g_string_truncate(*loopValues[i].names, (*loopValues[i].names)->len -
+ 2);
+ loopValues[i].option->argHelp= (*loopValues[i].names)->str;
+ }
retval= snprintf(graphsDir, sizeof(graphsDir), "graphs-%d", getpid());
if (retval > sizeof(graphsDir) - 1)
g_queue_push_head(&moduleOptions, &optionSyncGraphsDir);
g_queue_push_head(&moduleOptions, &optionSyncGraphs);
+ g_queue_push_head(&moduleOptions, &optionSyncReduction);
g_queue_push_head(&moduleOptions, &optionSyncAnalysis);
g_queue_push_head(&moduleOptions, &optionSyncNull);
g_queue_push_head(&moduleOptions, &optionSyncStats);
g_queue_foreach(&moduleOptions, &gfRemoveModuleOption, NULL);
g_string_free(analysisModulesNames, TRUE);
+ g_string_free(reductionModulesNames, TRUE);
g_queue_clear(&processingModules);
g_queue_clear(&matchingModules);
g_queue_clear(&analysisModules);
+ g_queue_clear(&reductionModules);
g_queue_clear(&moduleOptions);
}
struct rusage startUsage, endUsage;
GList* result;
unsigned int i;
+ AllFactors* allFactors;
+ GArray* factors;
+ double minOffset, minDrift;
+ unsigned int refFreqTrace;
int retval;
if (!optionSync.present)
g_error("Analysis module '%s' not found", optionSyncAnalysis.arg);
}
+ syncState->reductionData= NULL;
+ result= g_queue_find_custom(&reductionModules, optionSyncReduction.arg,
+ &gcfCompareReduction);
+ if (result != NULL)
+ {
+ syncState->reductionModule= (ReductionModule*) result->data;
+ }
+ else
+ {
+ g_error("Reduction module '%s' not found", optionSyncReduction.arg);
+ }
+
syncState->processingModule->initProcessing(syncState, traceSetContext);
if (!optionSyncNull.present)
{
syncState->matchingModule->initMatching(syncState);
syncState->analysisModule->initAnalysis(syncState);
+ syncState->reductionModule->initReduction(syncState);
}
// Process traceset
G_MAXULONG, NULL);
lttv_process_traceset_seek_time(traceSetContext, ltt_time_zero);
- syncState->processingModule->finalizeProcessing(syncState);
+ // Obtain, reduce, adjust and set correction factors
+ allFactors= syncState->processingModule->finalizeProcessing(syncState);
+ factors= syncState->reductionModule->finalizeReduction(syncState,
+ allFactors);
+ freeAllFactors(allFactors, syncState->traceNb);
+
+ /* 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 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= traceSetContext->traces[i]->t;
+ traceFactors= &g_array_index(factors, Factors, i);
+
+ t->drift= traceFactors->drift;
+ t->offset= traceFactors->offset;
+ t->start_freq= traceSetContext->traces[refFreqTrace]->t->start_freq;
+ t->freq_scale= 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(traceSetContext,
+ &traceSetContext->time_span);
+
+ g_debug("traceset start %ld.%09ld end %ld.%09ld",
+ traceSetContext->time_span.start_time.tv_sec,
+ traceSetContext->time_span.start_time.tv_nsec,
+ traceSetContext->time_span.end_time.tv_sec,
+ traceSetContext->time_span.end_time.tv_nsec);
// Write graphs file
if (!optionSyncNull.present && optionSyncGraphs.present)
{
syncState->analysisModule->destroyAnalysis(syncState);
}
+ if (syncState->reductionModule != NULL)
+ {
+ syncState->reductionModule->destroyReduction(syncState);
+ }
free(syncState);
projects / lttv.git / blobdiff